Phylogenetic Characterization of Resistant Salmonella Strains in Typhoid Fever Patients in Nigeria

Salmonella species are Enterobacteriaceae associated with typhoid fever. In this study, the distribution of broad-spectrum β-lactamase regulatory genes and genetic relatedness of isolates was determined. Stool samples (400) were collected from patients with fever in Dalhatu Araf Specialist Hospital (DASH), Lafia, Nigeria, between March 2020 and April 2021. Salmonella species were isolated and extended-spectrum β-lactamase distribution was determined among resistant isolates using polymerase chain reaction (PCR). Genetic relatedness of Salmonella species resistant to the 10 first-line antibiotics administered was determined among S typhi isolated. Of the 60 isolates that were confirmed to belong to the genus Salmonella, 12 (20.0%) isolates with bla SHV genes were the most prevalent, blaOXA-1 and blaCTX-M-9 were present in 5 isolates each, while blaCTX-M-4 and blaTEM genes with a prevalence of 1.7% each were the least obtained in the isolates. Two isolates had a multidrug-resistant index (MDRI) of 1, and 2 others were positive with the S typhi staG gene. Sequencing to determine their diversity showed that isolates ST36 and ST138, respectively, had MDRI = 1 and are clustered in a group with a similarity coefficient of 0.00634. The 2 isolates had the highest genetic similarity, which indicates that the genetic diversity between the isolates is low, while Salmonella strain ST313L2 had a high level of genetic distance from the other isolates. The most resistant isolates are closely related which calls for concern.

Motivational climate dimensions predict youth soccer players' psychosocial well-being over time

OBJECTIVES

This study tested a longitudinal model of relationships, based on self-determination theory, to determine whether motivational climate dimensions predicted young athletes' psychological need satisfaction and, in turn, personal and social responsibility.

DESIGN

We used a longitudinal design.

METHOD

Youth soccer players (N = 161; M = 10.8 years-old, SD = 1.0 year) completed a survey at two time points, spaced 4 months apart, on average.

RESULTS

Several significant direct effects emerged. First, greater perceptions that coaches punished for mistakes predicted decreases in relatedness with coaches and teammates. Second, greater perceptions of relatedness with coaches and teammates predicted increases in personal and social responsibility. Indirect effects also emerged: (a) punishment for mistakes predicted decreases in personal responsibility and social responsibility, and (b) cooperative learning predicted increases in social responsibility, through effects on coach and teammate relatedness.

CONCLUSIONS

Results suggest that coaches who provide opportunities for collaborative learning and minimize mistake-contingent punishment will foster athletes' sense of connection and enhance their psychosocial well-being.

SNP heterozygosity, relatedness and inbreeding of whole genomes from the isolated population of the Faroe Islands

BACKGROUND

The population of the Faroe Islands is an isolated population but very little is known about it from whole genome sequencing. The population of about 50000 people has a high incidence of rare diseases e.g., 1:300 for Primary Carnitine Deficiency. A screening programme was implemented, and eleven persons were also whole genome sequenced at x37 coverage for diagnostic purposes of those cases that were not affected by the known mutations. The purpose of our study is to utilize the high coverage data to explore the genomic variation and the ancestral history of the population. We study the SNP heterozygosity, the pairwise relatedness from kinship, the inbreeding from runs of homozygosity ROH, and we find the minor allele frequency distribution. We estimate the population ancestry and the timing of the founding event by using the whole genomes from eight consenting individuals.

RESULTS

We find the number of SNPs and the heterozygosity for the eight individual samples, and for merged samples, for which we also study the relatedness. We find close relatedness between the supposedly unrelated individuals. From ROH, we interpret the high relatedness as an ancient property of the isolated population. A bottleneck event is estimated starting between years [Formula: see text] with a maximum consanguineous population in year [Formula: see text] and similarly consanguineous between years [Formula: see text]. The ancestry analysis shows the population descends from founders of [Formula: see text] European and [Formula: see text] Admixed American ancestry. A distinct clustering near the central European and British populations of the 1000 Genome Project is likely the result of the population isolation and genetic drift. The minor allele frequency distribution suggests many rare variants.

CONCLUSIONS

The ancestry is mainly European while the inbreeding is higher compared to European populations and population isolates. The Faroese population has inbreeding more like ancient Europeans. We discovered a bottlenecked and consanguineous population event and estimated it starting in the 1st-4th century as compared to the oldest archaeological findings from the 4th-6th century.

The influence of methods of selecting concepts of an expository text on different reading representations' predictive ability

In this study, we compared two experimental methods of selecting terms in expository text to generate reading representations and tested how well these reading representations predicted reading comprehension. The two experimental methods were the traditional method of using all terms (all keywords) to create participants' representation networks, and the terms categorization (TC) method of using only important terms (core and branch words). Representation networks were assessed using participants' adjacency scores, ratings of relatedness in pairs of terms, and using summary (summary writing) by all turms. An in-subject design was performed in experiments 1 and 2, and an inter-subject design was performed in experiment 3 to test the hypothesis. With the same sample in exp1 and epx2, a different sample in each exp3. Experiment 1 showed that when using only the traditional way of selecting terms, adjacency was better than relatedness in predicting reading comprehension. Reading representations generated based on the summary method could not predict participants' reading comprehension ability, so this method was excluded from subsequent studies. Experiment 2 showed that the terms selected in Experiment 1 were stronger predictors of reading comprehension when the word pairs included a core term (central to understanding of full text) or a branch term (key to understanding paragraph), relative to a detail term (not affect the understanding full text). Experiment 3 found that whereas the two methods were equally effective in generating representations measured by adjacency, TC was superior in generating representations measured by relatedness. These conclusions have important implications for future research and application.

Parental care behaviour in response to perceived paternity is not mediated by 11-ketotestosterone in bluegill sunfish

Parental care is critical for the survival of many young animals, but parental care can be costly to the individual providing care. To balance this cost, parents can allocate their care to offspring based on their value, which can be dependent on the offspring's relatedness to the parent. Bluegill (Lepomis macrochirus) is a fish characterized by uniparental male care and high levels of cuckoldry. While parental males of this species have been shown to adaptively adjust their care in response to paternity, the mechanisms for this adjustment are not well understood. Androgens are steroid hormones that are associated with parental care behaviours in many species including bluegill. Here, we test the hypothesis that circulating androgen concentrations mediate the adjustment in care provided by bluegill parental males by manipulating perceived paternity and then measuring circulating 11-ketotestosterone concentration and parental care behaviour. We show that males with higher perceived paternity provide higher levels of nurturing and nest defense behaviour, but contrary to expectations, we found that these males had lower concentrations of 11-ketotestosterone. Furthermore, we found positive correlations between individual circulating plasma 11-ketotestosterone concentrations and nurturing behaviour, but not with the aggressive behaviours that differed between paternity treatments. While bluegill make behavioural changes in response to perceived paternity, these changes do not appear to be modulated by 11-ketotestosterone.

How changing needs change technological practices during a crisis: An explanation using practice theory

The COVID-19 pandemic as a global crisis has created an opportunity to examine the theoretical tenets of the technology as routine capability perspective, and its extensions. We argue that the pandemic acted as a crisis that shifted technology use patterns via changing daily routines, or patterns of what we practice, and how we communicate in the social context. Specifically, we focus on changes in human needs as the primary mechanism that mediate the impact of the pandemic crisis on changes in technology practices. We collected survey responses from 213 participants before COVID-19, and 447 after the rapid spread of COVID-19. Empirical results mostly confirmed our hypotheses, and revealed that the pandemic crisis created a significant shift in four practices: communication, browsing, information sourcing, and material sourcing. We also found that the human needs of autonomy and relatedness mediated this relationship between the pandemic crisis and technology practices. These findings provided support for our proposed mediating role of human needs in explaining how major shifts create technology change and extending the technology as routine capability perspective. We conclude with a discussion, implications, and directions for future researchers.

Web-based need-supportive parenting program to promote physical activity in secondary school students: a randomized controlled pilot trial

BACKGROUND

Current global trend of insufficient physical activity (PA) among children and adolescents highlights the necessity of finding effective ways to promote PA in childhood. Self-determination theory (SDT) has demonstrated efficacy as a conceptual framework for developing interventions aimed at promoting diverse health behaviours. Parents have potential to influence children's health behaviours to a great extent, which could be enhanced from an online, self-paced training to gain knowledge on how to support children's intrinsic motivation towards particular health behaviour. In this pilot study, we developed and tested an online SDT-informed need-supportive training for parents, enabling them to interact with their children in a way to support their intrinsic motivation towards leisure-time physical activity.

METHODS

Sixty eight students (Mage = 12.5 ± 0.72) and one parent for each child were randomly assigned to the 6-week intervention condition or control condition. Students completed psychological measures (i.e., perceptions of parents' need-supportive behaviours, basic psychological need satisfaction and frustration, autonomous and controlled forms of motivation, as well as social cognition beliefs towards leisure-time PA) and self-reported PA pre-intervention, post-intervention, and one-month after the intervention. Repeated measures ANOVAs were conducted to test the effects of the intervention condition and time.

RESULTS

While a statistically significant intervention effect on children's leisure-time PA was not found, students in the intervention group reported higher, albeit marginal, perceptions of intrinsic motivation (F(2, 84) = 3.095, p = 0.050) and lower perceptions of introjected regulation (F(2, 88) = 3.107, p = 0.050) and autonomy frustration (F(2, 84) = 2.987, p = 0.056) at follow-up. Contrary to expectations, children in the control group demonstrated higher perceptions of intention (F(2, 84) = 4.838, p = 0.010) and effort (F(2, 80) = 3.473, p = 0.036) towards leisure-time physical activity at follow-up. No significant changes were found in perceptions of need-supportive behaviour from parents, attitude, and perceived behavioural control.

CONCLUSIONS

Our pilot study highlights the importance of parental training and the potential for SDT-informed interventions to support children's intrinsic motivation towards physical activity. Further research is needed to test the intervention in other domains and combine interventions in several domains to have the highest impact.

TRIAL REGISTRATION

This pilot study is part of preparation for the main study, prospectively registered in ISRCTN registry as ISRCTN78373974 (15.12.2022). The current stage of the main study is 'recruiting'.

Inferring biological kinship in ancient datasets: comparing the response of ancient DNA-specific software packages to low coverage data

BACKGROUND

The inference of biological relations between individuals is fundamental to understanding past human societies. Caregiving, resource sharing and sexual behaviours are often mediated by biological kinship and yet the identification and interpretation of kin relationships in prehistoric human groups is difficult. In recent years, the advent of archaeogenetic techniques have offered a fresh approach, and when combined with more traditional osteological and interpretive archaeological methods, allows for improved interpretation of the burial practices, cultural behaviours, and societal stratification in ancient societies. Although archaeogenetic techniques are developing at pace, questions remain as to their accuracy, particularly when applied to the low coverage datasets that results from the sequencing of DNA derived from highly degraded ancient material.

RESULTS

The performance of six of the most commonly used kinship identifcation software methods was explored at a range of low and ultra low genome coverages. An asymmetrical response was observed across packages, with decreased genome coverage resulting in differences in both direction and degree of change of calculated kinship scores and thus pairwise relatedness estimates are dependant on both package used and genome coverage. Methods reliant upon genotype likelihoods methods (lcMLkin, NGSrelate and NGSremix) show a decreased level of prediction at coverage below 1x, although were consistent in the particular relationships identified at these coverages when compared to the pseudohaploid reliant methods tested (READ, the Kennett 2017 method and TKGWV2.0). The three pseudohaploid methods show predictive potential at coverages as low as 0.05x, although the accuracy of the relationships identified is questionable given the increase in the number of relationships identifIed at the low coverage (type I errors).

CONCLUSION

Two pseudohaploid methods (READ and Kennett 2017) show relatively consistent inference of kin relationships at low coverage (0.5x), with READ only showing a significant performance drop off at ultralow coverages (< 0.2x). More generally, our results reveal asymmetrical kinship classifications in some software packages even at high coverages, highlighting the importance of applying multiple methods to authenticate kin relationships in ancient material, along with the continuing need to develop laboratory methods that maximise data output for downstream analyses.

Effect of victim relatedness on cannibalistic behaviour of ladybird beetle, Cheilomenes sexmaculata Fabricius (Coleoptera: Coccinellidae)

Cannibalism is taxonomically widespread and has a large impact on the individuals' fitness and population dynamics. Thus, identifying how the rates of cannibalism are affected by different ecological cues is crucial for predicting species evolution and population dynamics. In current experiment, we investigated how victim relatedness affects the cannibalistic tendencies of different life stages of ladybird, Cheilomenes sexmaculata, which is highly cannibalistic. We provided larval instars and newly emerged adults of C. sexmaculata with a choice of sibling, half-sibling and non-sibling conspecific eggs as victim of cannibalism. First victim cannibalised and latency to cannibalise were observed along with total number of victims cannibalised after 24 h. First preference of victim did not differ with life stages of the cannibals though the number of victims cannibalized did increase with advancement in stage. Percent egg cannibalism also varied significantly with life stage and victim relatedness. First and second instars tend to cannibalise more percentage of sibling and non-sibling eggs while third instars cannibalised more percentage of non-sibling eggs; fourth instars and adults on the other hand cannibalised highest percentage of eggs irrespective of their relatedness. Insignificant effect of victim relatedness was observed on latency to cannibalise eggs, though it varied significantly with the cannibal's life stage. Shortest latency to cannibalise was recorded for first instars and longest for adults and second instars. In conclusion, kin recognition and avoidance of cannibalism is stage-specific, with fourth instar and newly emerged adults being less discriminatory as compared to early stages owing to increased evolutionary survival pressure.

Autonomy-relatedness Patterns and their Association with Academic and Psychological Adjustment among Chinese Adolescents

Establishing autonomy and maintaining relatedness with parents are two of the most crucial goals for adolescents and meeting these goals can be critical for academic and psychological adjustment. A two-dimensional framework was proposed for exploring the integrative synthesis of autonomy and relatedness, but its cultural applicability was limited. To better account for the situations associated with non-Western cultural context, this study extended the prior framework to three dimensions (volition, functional independence, and relatedness) and utilized latent profile analysis to explore the configurations and their concurrent and longitudinal (one year later) associations with adjustment (academic engagement, academic buoyancy, depressive symptoms, and externalizing problems). The study collected data from 3992 Chinese adolescents (51.33% girls, M_age = 15.41, SD = 0.55). Latent profile analyses identified five profiles: High, High Functional Independence, Moderate, Low Functional Independence, and Extremely Low Functional Independence. The High profile was the robust optimal pattern for academic and psychological adjustment, while the Low Functional Independence and Extremely Low Functional Independence were risk patterns over time. The High Functional Independence profile was only conducive to academic areas but not to psychological areas. Findings demonstrated the necessity of the three-dimensional framework in this field.

Development of a tool for quantifying need-supportive coaching in technology-mediated exercise classes

Technology-mediated interventions to promote physical activity are growing in popularity and appear to be effective for supporting continued adherence for some people. Some of this efficacy may be related to the cultivation of motivation that is self-determined (i.e., autonomous), which is posited to arise from the satisfaction of three basic psychological needs: competence, relatedness, and autonomy. We developed an observational coding tool for quantifying the frequency of needs-supportive and needs-indifferent coaching during technology-mediated exercise classes. The Peloton Instructor Needs-Supportive Coaching (PINC) tool shows evidence of reliability (average kappa = .91). We also demonstrated the utility of the PINC for characterizing needs-supportive coaching profiles across 4 different types of classes (Beginner, Power Zone, Groove, and High-Intensity Interval Training) and the construct validity of the PINC with respect to examining the relationship of needs-supportive coaching to intrinsic motivation. The PINC offers a useful tool with which future studies could evaluate whether and how instructor coaching impacts self-determined motivation to exercise within a technology-mediated context.

Sex ratio and relatedness in the Griffon vulture (Gyps fulvus) population of Serbia

Background

Once a widespread species across the region of Southeast Europe, the Griffon vulture is now confined to small and isolated populations across the Balkan Peninsula. The population from Serbia represents its biggest and most viable population that can serve as an important reservoir of genetic diversity from which the birds can be used for the region's reintroduction programmes. The available genetic data for this valuable population are scarce and as a protected species that belongs to the highly endangered vulture group, it needs to be well described so that it can be properly managed and used as a restocking population. Considering the serious recent bottleneck event that the Griffon vulture population from Serbia experienced we estimated the overall relatedness among the birds from this population. Sex ratio, another important parameter that shows the vitality and strength of the population was evaluated as well.

Methods

During the annual monitoring that was performed in the period from 2013-2021, we collected blood samples from individual birds that were marked in the nests. In total, 169 samples were collected and each was used for molecular sexing while 58 presumably unrelated birds from different nests were used for inbreeding and relatedness analyses. The relatedness was estimated using both biparentally (10 microsatellite loci) and uniparentally (Cytb and D-loop I of mitochondrial DNA) inherited markers.

Results

The level of inbreeding was relatively high and on average it was 8.3% while the mean number of relatives for each bird was close to three. The sex ratio was close to 1:1 and for the analysed period of 9 years, it didn't demonstrate a statistically significant deviation from the expected ratio of 1:1, suggesting that this is a stable and healthy population. Our data suggest that, even though a relatively high level of inbreeding can be detected among the individual birds, the Griffon vulture population from Serbia can be used as a source population for restocking and reintroduction programmes in the region. These data combined with previously observed genetic differentiation between the populations from the Iberian and Balkan Peninsulas suggest that the introduction of foreign birds should be avoided and that local birds should be used instead.

Freedom through constraint: Young women's embodiment, space and wellbeing during lockdown

Following the emergence of the COVID-19 pandemic and the associated lockdown restrictions in March 2020, young people were suddenly faced with a reduction and reconfiguration of the spaces in which they could 'be'. This paper explores how in this lockdown context, young women (aged 10-20) experienced their bodies and wellbeing, where traditional social connections (particularly school and physical connections) were not possible. Based on qualitative responses (n = 511) from an online, open-ended survey on wellbeing, physical activity, body image and social media usage, we explore how a reduction and reconfiguration of space, understood relationally, contributes to an individual's wellbeing. Using abductive reasoning and taking a phenomenological approach, we concentrate on the embodied experience of wellbeing and how this links to the spaces in which the body is lived. We suggest that the removal of spaces during lockdown, which on the one hand can be seen as problematic for maintaining wellbeing, also enabled many young women to experience new connections - with their bodies, family, and the environment and nature, that supplemented previous connections and fostered positive relationships and wellbeing. The removal of specific performative modes of judgement associated with the school environment was a positive influence on many young women's relationships with their own bodies and their wider construction of wellbeing, but increased use of social media spaces were found to reconstitute these performative experiences. The benefits of the specific and newly delimited freedoms associated with the forced lockdown have implications for an understanding of embodied wellbeing that is not individual, instead embedded inextricably in relations of connectedness with others in space and the nature of these intersubjective experiences.

The role of students' relational identity and autotelic experience for their innovative and continuous use of e-learning

Over the last decades, using e-learning systems as an alternative format of education for traditional classroom has been growing in higher education and due to COVID-19 pandemic, this transition has been unprecedently accelerated. Although there is a large body of research on e-learning, little is known about the extent to which innovative and continuous use of e-learning systems can be influenced by students' social and motivational factors especially their relational identity and autotelic experience. This study collected data from 400 higher education students through a survey to explore the role of students' relational identity and autotelic experiences regarding their innovative and continuous use of e-learning systems while considering the mediating role of students' perception of relatedness. Collected data were analyzed using the structural equation modeling method. The results showed that students' relational identity and autotelic experience significantly influence the innovative and continuous use of e-learning. The results showed that relational identity and autotelic experience positivly associatewith innovative (β = 0.190, t = 3.544; β = 0.405, t = 7.973) and continuous use of e-learning (β = 0.188, t = 3.115; β = 0.344, t = 7.459) and relatedness plays a moderating role between relational identity and continuous use (β = 0.194, t = 4.500, p = 0.000). Relatedness weakens the relationship between relational identity and innovative use of e-learning. However, it reinforces the relationship between relational identity and the continuous use of e-learning. It was found that relatedness strengthens the relationship between autotelic experience with innovative and continuous use of e-learning. The results of this study provide evidence of how students' social and motivational factors can influence their approaches to the innovative and continuous use of e-learning systems. We discuss these results and provide agenda for future practical and professional work.

Cooperation enhances motor learning

Relatedness represents the need to experience satisfaction from interpersonal acceptance and closeness with others and is considered a basic psychological human need. Studies testing the effects of supporting the learners' need for relatedness in motor learning (e.g., Gonzalez & Chiviacowsky, 2018) have manipulated relatedness basically by instructions from the experimenter and using practice and learning at an individual level. A different form of supporting the need for relatedness is through cooperative learning. In different domains, contexts involving cooperative effort strategies and goals were observed to result in greater positive interpersonal relationship and higher goal achievement in relation to individual efforts or competitive conditions. In this experiment, the effects of practice structured in cooperative or competitive ways on the learning of hitting a ball with a racket toward a target was tested. Adolescents practiced in pairs and were assigned to three experimental groups. In the cooperation group, the participants practiced in a cooperative condition while in the competitive group, the participants practiced in a competitive condition. Participants in a control group also practiced in the presence of another participant but were not induced at cooperative or competitive conditions. In the next day all groups performed retention and transfer tests. Questionnaires measured the participants' motivational and affective levels. The results show that cooperation increases intrinsic motivation, positive affect, self-efficacy, and task learning relative to individual efforts or competitive practice. Competition decreases perceived relatedness. The findings add to a growing body of evidence showing the importance of social relatedness for motor performance and learning. They also indicate a positive influential role of cooperation in motor learning.

A vector-based semantic relatedness measure using multiple relations within SNOMED CT and UMLS

OBJECTIVE

To propose a new vector-based relatedness metric that derives word vectors from the intrinsic structure of biomedical ontologies, without consulting external resources such as large-scale biomedical corpora.

MATERIALS AND METHODS

SNOMED CT on the mapping layer of UMLS was used as a testbed ontology. Vectors were created for every concept at the end of all semantic relations-attribute-value relations and descendants as well as is_a relation-of the defining concept. The cosine similarity between the averages of those vectors with respect to each defining concept was computed to produce a final semantic relatedness.

RESULTS

Two benchmark sets that include a total of 62 biomedical term pairs were used for evaluation. Spearman's rank coefficient of the current method was 0.655, 0.744, and 0.742 with the relatedness rated by physicians, coders, and medical experts, respectively. The proposed method was comparable to a word-embedding method and outperformed path-based, information content-based, and another multiple relation-based relatedness metrics.

DISCUSSION

The current study demonstrated that the addition of attribute relations to the is_a hierarchy of SNOMED CT better conforms to the human sense of relatedness than models based on taxonomic relations. The current approach also showed that it is robust to the design inconsistency of ontologies.

CONCLUSION

Unlike the previous vector-based approach, the current study exploited the intrinsic semantic structure of an ontology, precluding the need for external textual resources to obtain context information of defining terms. Future research is recommended to prove the validity of the current method with other biomedical ontologies.

When body positivity falls flat: Divergent effects of body acceptance messages that support vs. undermine basic psychological needs

Although women now have access to messaging about body acceptance, the risks and benefits of such messaging are not well-researched. Using a self-determination theory framework, we contrasted need-supportive versus need-undermining messages about body acceptance. One message supported the basic psychological need for autonomy (i.e., personal agency to accept one's body); one targeted the basic need for body acceptance from others; and one used pressure to elicit body positivity - a need-undermining strategy. We contrasted these messages with one another and with a typical message of thinness idealization. In Experiments 1-4, we found that pressuring pro-body messages were more harmful to body image than messages that used autonomy support and acceptance from others. That is, they produced more pressure, less agency, and lower acceptance. Moreover, Experiments 2-4 showed that need-supportive messages increased state self-esteem from baseline, whereas pressuring body positivity did not. In Experiment 3 message-related self-perceptions mediated the effect of need-supportive messages on state self-esteem. In Experiment 4, need-supportive body acceptance messages reduced body shame and body surveillance, whereas pressure to be body positive did not - and this effect was mediated by body satisfaction induced by the message. We highlight the important difference between need-supportive and need-undermining body positivity.

A team level participatory approach aimed at improving sustainable employability of long-term care workers: a study protocol of a randomised controlled trial

Background

Staff currently working in long-term care experience several difficulties. Shortage of staff and poor working conditions are amongst the most prominent, which pose a threat to staff’s sustainable employability. To improve their sustainable employability it is important to create working conditions that fulfil workers’ basic psychological need for autonomy, relatedness and competence in line with Self-Determination Theory. Since many long-term care organisations work with self-managing teams, challenges exist at team level. Therefore, there is a need to implement an intervention aimed at maintaining and improving the sustainable employability of staff on team level.

Methods

We developed a participatory workplace intervention, the Healthy Working Approach. In this intervention teams will uncover what problems they face related to autonomy, relatedness and competence in their team, come up with solutions for those problems and evaluate the effects of these solutions. We will evaluate this intervention by means of a two-arm randomized controlled trial with a follow-up of one year. One arm includes the intervention group and one includes the waitlist control group, each consisting of about 100 participants. The primary outcome is need for recovery as proxy for sustainable employability. Intervention effects will be analysed by linear mixed model analyses. A process evaluation with key figures will provide insight into barriers and facilitators of the intervention implementation. The Ethical Committee Social Sciences of the Radboud University approved the study.

Discussion

This study will provide insight in both the effectiveness, and the barriers/facilitators of the implementation process of the Healthy Working Approach. The approach is co-created with long-term care workers, focuses on team-specific challenges, and is rooted in the evidence-based participatory workplace approach and Self-Determination Theory. First results are expected in 2022.

Trial registration

Netherlands Trial Register, NL9627. Registered 29 July 2021 - Retrospectively registered.

The opposite of a step parent - The genetics without any of the emotion: 'sperm donors' reflections on identity-release donation and relatedness

This paper draws upon data from an online survey with closed- and open-ended questions completed by 168 identity-release sperm donors who had all donated in the UK between 2010 and 2016. Paying particular attention to the qualitative data obtained from the donors' responses to the open-ended questions, this paper explores the sperm donors' thoughts and feelings about being an identity-release donor and about future information exchange and contact with offspring conceived with their gametes. It shows that the majority of donors regarded identity-release donation as their preferred method of donation, supported the removal of anonymity, did not have concerns about being an identity-release donor and indeed saw positives for both the donor-conceived offspring and themselves. However, it also highlights that the donors' thoughts and feelings about being an identity-release sperm donor, how they saw themselves in relation to the individual conceived with their donation, and their preferences for information exchange and contact, varied greatly. The paper explores how identity-release donation is surrounding by many unknowns and consequentially sperm donors struggle to conceptualize what it means to be an identity-release sperm donor. As well as adding to the literature on donor conception, relatedness and kinship, by giving voice to sperm donors' own views and experience of the identity-release regulatory context, and their thoughts and feelings about future information exchange, this paper will help policy makers and clinicians prepare for the imminent time when donor-conceived individuals in the UK can start requesting their donor's identity.

Teen reactions to a self-representational avatar: A qualitative exploration

PURPOSE

This research presents findings from a qualitative exploration of the reactions of adolescents (12-14 years old) to navigating an exergame with an avatar created from multiple scans of the player (referred to as a self-representational avatar).

METHODS

Post-gameplay interviews were conducted with adolescents following participation in a 20-min laboratory session (21.2 ± 0.8 min, mean ± SD) where the self-representational avatar was navigated through an exergame. Verbatim transcripts (n = 40) were coded and analyzed by 2 independent coders using hybrid thematic analysis for this secondary data analysis. Codes were reviewed to identify themes representing adolescents' reactions.

RESULTS

Four themes emerged. Adolescents connected with their avatars and felt protective toward them, which influenced their actions in the exergame and contributed to their overall game enjoyment.

CONCLUSION

Creating exergames navigated by a self-representational avatar was an enjoyable experience and influenced gameplay. Future research should explore the effect of this approach on gameplay frequency and intensity over time.

Drivers of gut microbiome variation within and between groups of a wild Malagasy primate

BACKGROUND

Various aspects of sociality can benefit individuals' health. The host social environment and its relative contributions to the host-microbiome relationship have emerged as key topics in microbial research. Yet, understanding the mechanisms that lead to structural variation in the social microbiome, the collective microbial metacommunity of an animal's social network, remains difficult since multiple processes operate simultaneously within and among animal social networks. Here, we examined the potential drivers of the convergence of the gut microbiome on multiple scales among and within seven neighbouring groups of wild Verreaux's sifakas (Propithecus verreauxi) - a folivorous primate of Madagascar.

RESULTS

Over four field seasons, we collected 519 faecal samples of 41 animals and determined gut communities via 16S and 18S rRNA gene amplicon analyses. First, we examined whether group members share more similar gut microbiota and if diet, home range overlap, or habitat similarity drive between-group variation in gut communities, accounting for seasonality. Next, we examined within-group variation in gut microbiota by examining the potential effects of social contact rates, male rank, and maternal relatedness. To explore the host intrinsic effects on the gut community structure, we investigated age, sex, faecal glucocorticoid metabolites, and female reproductive state. We found that group members share more similar gut microbiota and differ in alpha diversity, while none of the environmental predictors explained the patterns of between-group variation. Maternal relatedness played an important role in within-group microbial homogeneity and may also explain why adult group members shared the least similar gut microbiota. Also, dominant males differed in their bacterial composition from their group mates, which might be driven by rank-related differences in physiology and scent-marking behaviours. Links to sex, female reproductive state, or faecal glucocorticoid metabolites were not detected.

CONCLUSIONS

Environmental factors define the general set-up of population-specific gut microbiota, but intrinsic and social factors have a stronger impact on gut microbiome variation in this primate species. Video abstract.

Performance comparison of gel and capillary electrophoresis-based microsatellite genotyping strategies in a population research and kinship testing framework

OBJECTIVE

The advancement of molecular techniques in an era in which high-throughput sequencing has revolutionized biology renders old-fashioned alternatives to high-throughput methods obsolete. Such advanced molecular techniques, however, are not yet accessible to economically disadvantaged region-based laboratories that still obtain DNA profiles using gel-based techniques. To explore whether cost-efficient techniques can produce results that are as robust as those obtained using high-throughput methods, we compared the performance of polyacrylamide gel electrophoresis (PAGE)- and capillary electrophoresis (CE)-derived genomic data in estimating genetic diversity and inferring relatedness using 70 individuals of fine flounder (Paralichthys adspersus) selected from a hatchery population and genotyped for five microsatellite loci.

RESULTS

Here, we show that PAGE- and CE-derived genomic datasets yield comparable genetic diversity levels regarding allelic diversity measures and heterozygosity. However, relatedness inferred from each dataset showed that the categorization of dyads in the different relationship categories strongly differed. This suggests that while scientists can reliably use PAGE-derived genomic data to estimate genetic diversity, they cannot use the same for parentage testing. The findings could help laboratories committed to population research not be discouraged from using the PAGE system if high-throughput technologies are unavailable and the method is adequate to address the biological question.

Psychological benefits of using social virtual reality platforms during the covid-19 pandemic: The role of social and spatial presence

Social virtual reality (VR) platforms are an emergent phenomenon, with growing numbers of users utilizing them to connect with others while experiencing feelings of presence (“being there”). This article examines the associations between feelings of presence and the activities performed by users, and the psychological benefits obtained in terms of relatedness, self-expansion, and enjoyment, in the context of the covid-19 pandemic. The results of a survey conducted among users (N = 220) indicate that feelings of spatial presence predict these three outcomes, while social presence predicts relatedness and enjoyment, but not self-expansion. Socialization activities like meeting friends in VR are associated with relatedness and enjoyment, while playful and creative activities allow for self-expansion. Moreover, the perceived impact of social distancing measures was associated with an increase in use, suggesting the utility of these platforms to help users meeting particularly frustrated psychological needs. These results provide a first quantitative account of the potential positive effects of social VR platforms on users’ wellbeing and encourage further research on the topic.

Inclusive fitness and Hamilton's rule in a stochastic environment

The evolution of cooperation in Prisoner's Dilemmas with additive random cost and benefit for cooperation cannot be accounted for by Hamilton's rule based on mean effects transferred from recipients to donors weighted by coefficients of relatedness, which defines inclusive fitness in a constant environment. Extensions that involve higher moments of stochastic effects are possible, however, and these are connected to a concept of random inclusive fitness that is frequency-dependent. This is shown in the setting of pairwise interactions in a haploid population with the same coefficient of relatedness between interacting players. In an infinite population, fixation of cooperation is stochastically stable if a mean geometric inclusive fitness of defection when rare is negative, while fixation of defection is stochastically unstable if a mean geometric inclusive fitness of cooperation when rare is positive, and these conditions are generally not equivalent. In a finite population, the probability for cooperation to ultimately fix when represented once exceeds the probability under neutrality or the corresponding probability for defection if the mean inclusive fitness of cooperation when its frequency is 1/3 or 1/2, respectively, exceeds 1. All these results rely on the simplifying assumption of a linear fitness function. It is argued that meaningful applications of random inclusive fitness in complex settings (multi-player game, diploidy, population structure) would generally require conditions of weak selection and additive gene action.

The Utility of Self-Determination Theory in Predicting Transition Readiness in Adolescents With Special Healthcare Needs

PURPOSE

Adolescents and young adults with chronic health conditions must learn skills to successfully manage their health as they prepare to transition into adult-based care. Self-determination theory (SDT), an empirically based theory of human motivation, posits that competence (feeling effective), autonomy (volition to perform behaviors), and relatedness (support for autonomy from others) influence behavioral change. This study evaluates the utility of SDT constructs in predicting transition readiness among adolescents and young adults recruited into an intervention to promote successful healthcare transition.

METHODS

Baseline assessments were completed by 137 patients aged 17-23 years recruited from pediatric renal, gastroenterology, or rheumatology clinical services. Surveys measured transition readiness (Transition Readiness Assessment Questionnaire) as well as SDT constructs, including competence (Patient Activation Measure); provider relatedness and parent autonomy support (Health Care Climate Questionnaire); and health care-related autonomy (Treatment Self-Regulation Questionnaire). Relationships between SDT constructs and transition readiness were evaluated using linear regression.

RESULTS

Between 44 and 48 participants were recruited from each service. Bivariate correlation coefficients between transition readiness and SDT constructs were competence (r = .44), autonomous autonomy (r = .34), controlled autonomy (r = .27), provider relatedness (r = .46), and parental autonomy support (r = .35) (p < .01). Age positively correlated with transition readiness (r = .47, p < .001). After controlling for age, gender, and clinical service, competence (p < .001) and provider relatedness (p = .008) successfully predicted transition readiness (R² = .423; F change; p < .001).

CONCLUSIONS

Findings from this cross-sectional study support the utility of SDT constructs in promoting transition readiness among adolescents and young adults with chronic conditions, underscoring the importance of building competence and provider support for autonomy during this critical period.

Metacommunities, fitness and gradual evolution

We analyze the evolution of a multidimensional quantitative trait in a class-structured focal species interacting with other species in a wider metacommunity. The evolutionary dynamics in the focal species as well as the ecological dynamics of the whole metacommunity is described as a continuous-time process with birth, physiological development, dispersal, and death given as rates that can depend on the state of the whole metacommunity. This can accommodate complex local community and global metacommunity environmental feedbacks owing to inter- and intra-specific interactions, as well as local environmental stochastic fluctuations. For the focal species, we derive a fitness measure for a mutant allele affecting class-specific trait expression. Using classical results from geometric singular perturbation theory, we provide a detailed proof that if the effect of the mutation on phenotypic expression is small ("weak selection"), the large system of dynamical equations needed to describe selection on the mutant allele in the metacommunity can be reduced to a single ordinary differential equation on the arithmetic mean mutant allele frequency that is of constant sign. This invariance on allele frequency entails the mutant either dies out or will out-compete the ancestral resident (or wild) type. Moreover, the directional selection coefficient driving arithmetic mean allele frequency can be expressed as an inclusive fitness effect calculated from the resident metacommunity alone, and depends, as expected, on individual fitness differentials, relatedness, and reproductive values. This formalizes the Darwinian process of gradual evolution driven by random mutation and natural selection in spatially and physiologically class-structured metacommunities.

Distributional Models of Category Concepts Based on Names of Category Members

Cognitive scientists have long used distributional semantic representations of categories. The predominant approach uses distributional representations of category-denoting nouns, such as "city" for the category city. We propose a novel scheme that represents categories as prototypes over representations of names of its members, such as "Barcelona," "Mumbai," and "Wuhan" for the category city. This name-based representation empirically outperforms the noun-based representation on two experiments (modeling human judgments of category relatedness and predicting category membership) with particular improvements for ambiguous nouns. We discuss the model complexity of both classes of models and argue that the name-based model has superior explanatory potential with regard to concept acquisition.

Phylogenetic distance and resource availability mediate direction and strength of plant interactions in a competition experiment

Phylogenetic ecology uses evolutionary history to improve understanding of plant interactions. Phylogenetic distance can mediate plant interactions such as competition (e.g., via limiting similarity) and facilitation (e.g., via niche complementarity), influencing community assembly patterns. Previous research has found evidence both for and against a relationship between phylogenetic distance and the strength of plant interactions, and has found that other factors, such as trait differences, may be more influential. In addition to phylogenetic distance and species' traits, environmental conditions can also influence competition, with facilitative interactions-particularly among distantly related species-potentially becoming more pronounced under stressful, resource-limited conditions. We tested the prediction that greater phylogenetic distance is associated with decreased competition in a greenhouse experiment using plant species of the North American tallgrass prairie. We calculated the Relative Interaction Index for 81 species pairs using plant height, leaf length, and biomass as indicators of performance. We found that phylogenetic distance alone did not significantly affect competition. However, the interaction between phylogenetic distance and stressful conditions (sandier soils with low nutrient availability and water retention vs. resource-rich potting soil) altered plant traits and competition. Under stressful conditions, more distantly related species competed more strongly, leading to smaller plants. Conversely, under benign conditions more distantly related species pairs competed less and were larger. These results were contrary to our expectations that distant relatives would compete less under stressful conditions. Our experiment provides evidence that, while relatedness alone may not drive competition, phylogenetic distance can nonetheless be influential through interactions with environmental conditions.

"It's harder for the likes of us": racially minoritised stem cell donation as ethico-racial imperative

How best are we to understand appeals to participate in a biomedical project that are based both on invoking shared racial identity, and on framing engagement as the clear moral course of action? Stem cell donor recruitment, which often focuses on engaging racially minoritised communities, provides useful insight into this question. This article proposes that it is not an essential mutual racial identity between the person asking and the person asked at play. Rather, it is the creative 'doing' of relatedness between people at the scale of race as well as family that coalesces into powerful appeals to participate. Through analysis of ethnographic, documentary and social media data, the paper argues that this work relies at least partly on framing donation as a duty of being part of a racialised community, which I describe here as an ethico-racial imperative, in which both race and responsibility become intertwined to compel participation in the biomedical project of donor registration.

Supplementary Information

The online version contains supplementary material available at 10.1057/s41292-021-00241-9.

NGSremix: A software tool for estimating pairwise relatedness between admixed individuals from next-generation sequencing data

Estimation of relatedness between pairs of individuals is important in many genetic research areas. When estimating relatedness, it is important to account for admixture if this is present. However, the methods that can account for admixture are all based on genotype data as input, which is a problem for low-depth next-generation sequencing (NGS) data from which genotypes are called with high uncertainty. Here, we present a software tool, NGSremix, for maximum likelihood estimation of relatedness between pairs of admixed individuals from low-depth NGS data, which takes the uncertainty of the genotypes into account via genotype likelihoods. Using both simulated and real NGS data for admixed individuals with an average depth of 4x or below we show that our method works well and clearly outperforms all the commonly used state-of-the-art relatedness estimation methods PLINK, KING, relateAdmix, and ngsRelate that all perform quite poorly. Hence, NGSremix is a useful new tool for estimating relatedness in admixed populations from low-depth NGS data. NGSremix is implemented in C/C++ in a multi-threaded software and is freely available on Github https://github.com/KHanghoj/NGSremix.

The impact of an autonomy-supportive yoga intervention on self-determination in adults with intellectual and developmental disabilities

The aim of this study was to examine the impact of an autonomy-supportive yoga intervention on the self-determination of adults with intellectual and developmental disabilities. Research supports the use of autonomy-supportive interventions to increase positive health outcomes with this population. The present study utilized a qualitative approach with eight subjects participating in semi-structured qualitative interviews. Content analysis identified support for three themes related to the impact of yoga: autonomy, relatedness, competence. The results suggested that the yoga intervention may support self-determination for adults with IDD, as the participants' responses demonstrated increased feelings of autonomy, competence, and relatedness. The results also indicated that an autonomy-supportive yoga intervention can be achieved with adults with intellectual and developmental disabilities by targeting the key constructs of autonomy, relatedness, and competence.

The Development of Health Self-Management Among Adolescents With Chronic Conditions: An Application of Self-Determination Theory

PURPOSE

The purpose of the study was to better understand the progressive development of health self-management among adolescents and emerging adults (AEAs) with chronic medical conditions in order to identify opportunities to prepare AEA for transition to adult-based care.

METHODS

Twenty-three AEA aged 17-20 years with renal, inflammatory bowel, or rheumatologic diseases, and their parents, completed individual semistructured interviews describing each AEA's health self-management. Self-Determination Theory was used to frame interview questions, including the constructs of competence, autonomy, and autonomy support. Transcripts were analyzed using directed content analysis.

RESULTS

Four themes emerged: Development of Competence in Self-Management; Autonomy: Motivations to Self-Manage; Ways Important Others Support or Hinder Independence; and Normal Adolescent Development. AEA's competency and autonomy increased as they progressed from lack of knowledge about self-management to having knowledge without doing tasks, and, ultimately, to independent completion of tasks. Motivations to self-manage included avoiding sickness/weakness and wanting to engage in activities. Parents and providers supported AEA's autonomy through teaching and transferring responsibility. Parental fear/lack of trust in AEA's ability to self-manage hindered development of AEA's autonomy, producing anxiety. Normal adolescent development impacted timing of self-management task mastery.

CONCLUSIONS

As AEA gain competence in increasingly complex self-management tasks, they assume greater responsibility for managing their health. Competence and autonomy are facilitated by a feedback loop: AEA successful self-management increased parent trust, enabling the parent to transfer responsibility for more complex tasks. Conversely, parents' fear of the AEA doing wrong hinders transfer of responsibility, limiting competence and autonomy. Health-care providers play an important role in fostering autonomy.

Cross-species extrapolation of chemical sensitivity

Ecosystems are usually populated by many species. Each of these species carries the potential to show a different sensitivity towards all of the numerous chemical compounds that can be present in their environment. Since experimentally testing all possible species-chemical combinations is impossible, the ecological risk assessment of chemicals largely depends on cross-species extrapolation approaches. This review overviews currently existing cross-species extrapolation methodologies, and discusses i) how species sensitivity could be described, ii) which predictors might be useful for explaining differences in species sensitivity, and iii) which statistical considerations are important. We argue that risk assessment can benefit most from modelling approaches when sensitivity is described based on ecologically relevant and robust effects. Additionally, specific attention should be paid to heterogeneity of the training data (e.g. exposure duration, pH, temperature), since this strongly influences the reliability of the resulting models. Regarding which predictors are useful for explaining differences in species sensitivity, we review interspecies-correlation, relatedness-based, traits-based, and genomic-based extrapolation methods, describing the amount of mechanistic information the predictors contain, the amount of input data the models require, and the extent to which the different methods provide protection for ecological entities. We develop a conceptual framework, incorporating the strengths of each of the methods described. Finally, the discussion of statistical considerations reveals that regardless of the method used, statistically significant models can be found, although the usefulness, applicability, and understanding of these models varies considerably. We therefore recommend publication of scientific code along with scientific studies to simultaneously clarify modelling choices and enable elaboration on existing work. In general, this review specifies the data requirements of different cross-species extrapolation methods, aiming to make regulators and publishers more aware that access to raw- and meta-data needs to be improved to make future cross-species extrapolation efforts successful, enabling their integration into the regulatory environment.

Social purpose in an organization from the perspective of an employee: a self-determination outlook on the meaning of work

Objective

Advancing social purpose in organizations is usually studied from the macro perspective, i.e., how it benefits organizational business goals or society more broadly. In this paper, we focus on social purpose from the perspective of the employee and propose that advancing social purpose in an organization allows individuals to fulfil an important human need for the meaning of work (MW). This study’s objective was to assess whether a volunteering Corporate Social Responsibility (CSR) program in a manufacturing company allows employees to fulfil their basic psychological needs for relatedness, competence, and autonomy. The data was collected through in-depth interviews with 15 employees and an analysis of artifacts.

Results

In the analysis, three main themes describing different aspects of voluntary work at the company were identified. We found that across all groups of interviewed employees the voluntary activities served the needs of (1) relatedness, (2) competence, and (3) autonomy. We conclude that CSR programs have the most positive impact on MW when they allow employees to engage in prosocial actions and satisfy those needs.

Facebook and older adults: Fulfilling psychological needs?

Self-determination theory posits that feeling related, competent, and autonomous is central to wellbeing. However, meeting these psychological needs can become difficult as adults age. Facebook use has been associated with enhanced relatedness, competence, and autonomy in a student population, but the effect of Facebook use on the psychological needs in older adults has yet to be investigated. Drawing from self-determination theory, we investigated whether Facebook use facilitated older adults' relatedness, competence, and autonomy needs, and the relationship between these psychological needs and levels of mobility. One hundred and twenty-seven adults (Mage = 71), completed an online survey that measured Facebook use, relatedness, competence, autonomy, and levels of mobility. More frequent Facebook users reported significantly higher levels of relatedness compared to less frequent Facebook users, and less mobile participants reported significantly lower levels of autonomy and used Facebook significantly more frequently than more mobile participants. The potential of Facebook as a tool to help older adults meet their relatedness needs is discussed.

Population Genetic and Social Structure Survey of Solenopsis geminata in Thailand

Fire ants have long been known to be a major pest and have recently attracted renewed widespread attention due to the invasion of Solenopsis species, especially S. invicta, into many countries in Asia and Australia. Here, we surveyed fire ant specimens in Thailand with the aims of studying their colony biology and population structure. We sampled 38 colonies distributed in agricultural and urban areas throughout Thailand for species identification and found that all were S. geminata. We further genotyped 13 microsatellite loci from 576 workers from 23 of these colonies. Analysis of these genetic data revealed that all colonies were polygynous with only a few queens. Queens from the same colonies were highly genetically related. Population structure was partitioned into two clusters. Pairwise F _ST values revealed very high genetic differentiation between colonies suggesting low gene flow among populations. This result suggests that queens were locally mated and founded colonies by a budding strategy. Isolation-by-distance among local populations was not significant.

Family matters: skin microbiome reflects the social group and spatial proximity in wild zebra finches

Background

So far, large numbers of studies investigating the microbiome have focused on gut microbiota and less have addressed the microbiome of the skin. Especially in avian taxa our understanding of the ecology and function of these bacteria remains incomplete. The involvement of skin bacteria in intra-specific communication has recently received attention, and has highlighted the need to understand what information is potentially being encoded in bacterial communities. Using next generation sequencing techniques, we characterised the skin microbiome of wild zebra finches, aiming to understand the impact of sex, age and group composition on skin bacteria communities. For this purpose, we sampled skin swabs from both sexes and two age classes (adults and nestlings) of 12 different zebra finch families and analysed the bacterial communities.

Results

Using 16S rRNA sequencing we found no effect of age, sex and family on bacterial diversity (alpha diversity). However, when comparing the composition (beta diversity), we found that animals of social groups (families) harbour highly similar bacterial communities on their skin with respect to community composition. Within families, closely related individuals shared significantly more bacterial taxa than non-related animals. In addition, we found that age (adults vs. nestlings) affected bacterial composition. Finally, we found that spatial proximity of nest sites, and therefore individuals, correlated with the skin microbiota similarity.

Conclusions

Birds harbour very diverse and complex bacterial assemblages on their skin. These bacterial communities are distinguishable and characteristic for intraspecific social groups. Our findings are indicative for a family-specific skin microbiome in wild zebra finches. Genetics and the (social) environment seem to be the influential factors shaping the complex bacterial communities. Bacterial communities associated with the skin have a potential to emit volatiles and therefore these communities may play a role in intraspecific social communication, e.g. via signalling social group membership.

Concept Analysis of Relatedness in Physical Activity Among Adolescents

AIM

This analysis seeks to clarify the concept of relatedness in physical activity (PA) among adolescents.

BACKGROUND

Health-related behavior research highlights the importance of focusing on individual psychological needs such as relatedness in PA to improve adolescents' motivation toward PA. Although relatedness in PA has been associated with PA participation among adolescents, a thorough analysis of the concept is lacking. Conceptual clarification of relatedness in the context of PA is needed for promoting consistency between conceptual and operational definitions and refining empirical measurement.

DESIGN

The 6-steps of Rodgers' (2000) evolutionary method of concept analysis was used to analyze the data and identify attributes, surrogate/related terms, antecedents, and consequences of the relatedness concept.

METHOD

Several databases were used to extract relevant articles. A total of 113 were identified. Forty articles met the inclusion criteria. In addition, twenty-six articles were included through other sources. The review process yielded a final set of 66 articles.

RESULT

A refined definition of relatedness in PA is an adolescent's perception of feeling socially connected with significant people in a reciprocal, caring, and trusting relationship that is a self-system process and promotes a sense of belonging and internalization within PA contexts. Attributes, surrogate/related terms, antecedents and consequences of relatedness in PA were identified from extant literature.

CONCLUSION

This comprehensive analysis provides a clarification of the conceptual definition of relatedness in PA among adolescents. The concept can guide nurses in designing interventions to improve health behavior or promoting changes in health policy. Future research is needed to refine operational definitions of relatedness so that they represent the defining attributes of the concept.

Pedigree analysis of pre-breeding efforts in Trifolium spp. germplasm in New Zealand

Background

Prebreeding in plants is the activity designed to identify useful characteristics from wild germplasm and its integration in breeding programs. Prebreeding aims to introduce new variation into the populations of a species of interest. Pedigree analysis is a valuable tool for evaluation of variation in genebanks where pedigree maps are used to visualize and describe population structure and variation within these populations. Margot Forde Germplasm Centre (MFGC) is New Zealand’s national forage genebank and holds a collection of ~ 75 species of the genus Trifolium, of which only a dozen have been taken through prebreeding programs. The main objective of this study was to construct pedigree maps and analyse patterns of relatedness for seven minor Trifolium species accessions contained at the MFGC. These species are Trifolium ambiguum, Trifolium arvense, Trifolium dubium, Trifolium hybridum, Trifolium medium, Trifolium subterraneum and the Trifolium repens x Trifolium occidentale interspecific hybrids. We present a history of Trifolium spp. prebreeding in New Zealand and inform breeders of possible alternative forage species to use.

Results

Pedigree data from accessions introduced between 1950 and 2016 were used and filtered based on breeding activity. Kinship levels among Trifolium spp. remained below 8% and no inbreeding was found. Influential ancestors that contributed largely to populations structure were identified. The Australian cultivar ‘Monaro’ had a strong influence over the whole population of accessions in T. ambiguum. T. subterraneum and T. repens x T. occidentale had the largest number of generations (3). T. ambiguum and T. medium had the highest cumulative kinship across the decades.

Conclusions

We conclude that there are high levels of diversity in the seven Trifolium spp. studied. However, collection and prebreeding efforts must be strengthened to maximize utilization and bring useful genetic variation.

Investigation of mechanisms underlying chaotic genetic patchiness in the intertidal marbled crab Pachygrapsus marmoratus (Brachyura: Grapsidae) across the Ligurian Sea

Background

Studies on marine community dynamics and population structures are limited by the lack of exhaustive knowledge on the larval dispersal component of connectivity. Genetic data represents a powerful tool in understanding such processes in the marine realm. When dealing with dispersion and connectivity in marine ecosystems, many evidences show patterns of genetic structure that cannot be explained by any clear geographic trend and may show temporal instability. This scenario is usually referred to as chaotic genetic patchiness, whose driving mechanisms are recognized to be selection, temporal shifts in local population dynamics, sweepstakes reproductive success and collective dispersal.

In this study we focused on the marbled crab Pachygrapsus marmoratus that inhabits the rocky shores of the Mediterranean Sea, Black Sea and East Atlantic Ocean, and disperses through planktonic larvae for about 1 month. P. marmoratus exhibits unexpectedly low connectivity levels at local scale, although well-defined phylogeographic patterns across the species’ distribution range were described. This has been explained as an effect of subtle geographic barriers or due to sweepstake reproductive success. In order to verify a chaotic genetic patchiness scenario, and to explore mechanisms underlying it, we planned our investigation within the Ligurian Sea, an isolated basin of the western Mediterranean Sea, and we genotyped 321 individuals at 11 microsatellite loci.

Results

We recorded genetic heterogeneity among our Ligurian Sea samples with the occurrence of genetic clusters not matching the original populations and a slight inter-population divergence, with the geographically most distant populations being the genetically most similar ones. Moreover, individuals from each site were assigned to all the genetic clusters. We also recorded evidences of self-recruitment and a higher than expected within-site kinship.

Conclusions

Overall, our results suggest that the chaotic genetic patchiness we found in P. marmoratus Ligurian Sea populations is the result of a combination of differences in reproductive success, en masse larval dispersion and local larval retention. This study defines P. marmoratus as an example of marine spawner whose genetic pool is not homogenous at population level, but rather split in a chaotic mosaic of slightly differentiated genetic patches derived from complex and dynamic ecological processes.

Autonomy is not but competence and relatedness are associated with physical activity among colorectal cancer survivors

PURPOSE

The main objective of this study was to use the framework of the self-determination theory, incorporating both internal and external sources of motivation, to identify factors influencing physical activity among colorectal cancer survivors (CRC-S) in Korea.

METHOD

In total, 242 patients at a university-affiliated hospital in Seoul, Korea, responded to a descriptive survey, which comprised questionnaire sets including the Global Physical Activity Questionnaire and the Patient Health Questionnaire. Motivation was then assessed on three scales: the Treatment Self-Regulation (autonomy), Perceived Competence (competence), and the multidimensional Scale of Perceived Social Support (relatedness). Logistic regression analysis was then used to identify factors associated with physical activity.

RESULT

The mean physical activity score was 16.07 metabolic equivalent hours per week, and only 23.3% of patients had an appropriate level of exercise. In the logistic regression analysis, physical activity was associated with competence (odds ratio (OR) = 1.36, 95% confidence interval (CI): 1.06-1.74), relatedness (OR = 1.11, 95% CI: 1.04-1.18), depression (OR = 0.84, 95% CI: 0.75-0.94), and stage I or II disease (OR = 3.33, 95% CI: 1.28-1.86). This study indicated that competence, relatedness, depression, and the disease stage contributed to physical activity among these subjects while autonomy did not.

CONCLUSION

Future interventions to achieve the recommended levels of physical activity among CRC-S could benefit from taking into account the disease stage as well as psychosocial factors including motivation and depression.

Human-Genetic Ancestry Inference and False Positives in Forensic Familial Searching

In forensic familial search methods, a query DNA profile is tested against a database to determine if the query profile represents a close relative of a database entrant. One challenge for familial search is that the calculations may require specification of allele frequencies for the unknown population from which the query profile has originated. The choice of allele frequencies affects the rate at which non-relatives are erroneously classified as relatives, and allele-frequency misspecification can substantially inflate false positive rates compared to use of allele frequencies drawn from the same population as the query profile. Here, we use ancestry inference on the query profile to circumvent the high false positive rates that result from highly misspecified allele frequencies. In particular, we perform ancestry inference on the query profile and make use of allele frequencies based on its inferred genetic ancestry. In a test for sibling matches on profiles that represent unrelated individuals, we demonstrate that false positive rates for familial search with use of ancestry inference to specify the allele frequencies are similar to those seen when allele frequencies align with the population of origin of a profile. Because ancestry inference is possible to perform on query profiles, the extreme allele-frequency misspecifications that produce the highest false positive rates can be avoided. We discuss the implications of the results in the context of concerns about the forensic use of familial searching.

Relatedness coefficients in pedigrees with inbred founders

We study an extension of the standard framework for pedigree analysis, in which we allow pedigree founders to be inbred. This solves a number of practical challenges in calculating coefficients of relatedness, including condensed identity coefficients. As a consequence we expand considerably the class of pedigrees for which such coefficients may be efficiently computed. An application of this is the modelling of background inbreeding as a continuous effect. We also use inbred founders to shed new light on constructibility of relatedness coefficients, i.e., the problem of finding a genealogy yielding a given set of coefficients. In particular, we show that any theoretically admissible coefficients for a pair of noninbred individuals can be produced by a finite pedigree with inbred founders. Coupled with our computational methods, implemented in the R package ribd, this allows for the first time computer analysis of general constructibility solutions, thus making them accessible for practical use.

Combining spatial analysis and host population genetics to gain insights into the mode of transmission of a pathogen: The example of Toxoplasma gondii in mice

Toxoplasma gondii is a ubiquitous highly prevalent zoonotic protozoan. Cats are the definitive hosts, while all other warm-blooded animals are intermediate hosts for this parasite. Commensal rodents, being the main prey of cats, are probably the major reservoir for T. gondii in the domestic environment. Rodents can acquire infection after ingestion of oocysts that have sporulated in the environment. However, experimental evidence shows that vertical transmission can be sufficient for the perpetuation of transmission between generations of mice. In natural settings, the relative epidemiological importance of vertical transmission over oral transmission is a matter of debate and raises the question of the possibility of a T. gondii cycle in the absence of cats. In the present study, we took advantage of an extensive survey of commensal rodents in Dakar, Senegal, where the house mouse is the predominant putative reservoir of T. gondii. Mice genotypes and spatial location through GPS referencing of all trapping localizations were investigated in relation to T. gondii infection in eight sites of the city of Dakar and on Goree Island. In each sampling site, the occurrence of over-prevalence zones of T. gondii infection was investigated through Kulldorf's statistic using SaTScan software. Genetic structure and relatedness between mice were investigated within each over-prevalence zone, in order to find clues of transmission between related mice. Within each of the four over-prevalence zones identified across nine sites, infected mice belonged to more than one genetic group. No association between the degree of relatedness and the occurrence of T. gondii infection could be detected. These findings suggest an environmental source of infection for mice associated with localized putative foci of environmental contamination and support an oral route of infection for mice from Dakar rather than a cycle based on vertical transmission. However, further investigations based on a denser sampling in different epidemiological contexts are recommended.

Mechanisms underpinning the association between physical activity and mental health in adolescence: a 6-year study

BACKGROUND

Physical activity (PA) can promote mental health, but the mechanisms underpinning this association are not well-established. This study examined if perceptions of three basic psychological needs (autonomy, competence, relatedness) and moderate-to-vigorous physical activity (MVPA) mediate the association between number of years participating in PA and mental health in adolescence.

METHODS

Participants included 937 children (55% female) age 10-11 at inception of the longitudinal MATCH study, who provided data every 4 months over 6 years. Mediation analyses were used to assess the natural direct effect of number of years of PA participation (cycles 1-15) during late childhood and adolescence on later mental health (cycle 16), measured with the Mental Health Continuum-Short Form (MHC-SF), and the natural indirect effect through each of self-perceived autonomy, competence and relatedness, and self-report MVPA (cycle 15).

RESULTS

In single mediator models, indirect effects of autonomy, competence, relatedness and self-report MVPA were statistically significant. In joint mediation models (each of three models including one basic psychological need and MVPA), autonomy, competence and relatedness mediated 71, 27, and 51% of the association respectively; MVPA mediated 27-31% of the association. In the mediation model including all four mediators, relatedness mediated the largest proportion of the association, followed by autonomy and MVPA.

CONCLUSION

Results support developing strategies to encourage adolescents to engage and remain involved in PA. This could foster perceptions of autonomy, competence, and relatedness as well as MVPA, which in turn may enhance mental health.

Must the random man be unrelated? A lingering misconception in forensic genetics

A nearly universal practice among forensic DNA scientists includes mentioning an unrelated person as the possible alternative source of a DNA stain, when one in fact refers to an unknown person. Hence, experts typically express their conclusions with statements like: “The probability of the DNA evidence is X times higher if the suspect is the source of the trace than if another person unrelated to the suspect is the source of the trace.” Published forensic guidelines encourage such allusions to the unrelated person. However, as the authors show here, rational reasoning and population genetic principles do not require the conditioning of the evidential value on the unrelatedness between the unknown individual and the person of interest (e.g., a suspect). Surprisingly, this important semantic issue has been overlooked for decades, despite its potential to mislead the interpretation of DNA evidence by criminal justice system stakeholders.

Kin-dependent dispersal influences relatedness and genetic structuring in a lek system

Kin selection and dispersal play a critical role in the evolution of cooperative breeding systems. Limited dispersal increases relatedness in spatially structured populations (population viscosity), with the result that neighbours tend to be genealogical relatives. Yet the increase in neighbours' fitness-related performance through altruistic interaction may also result in habitat saturation and thus exacerbate local competition between kin. Our goal was to detect the footprint of kin selection and competition by examining the spatial structure of relatedness and by comparing non-effective and effective dispersal in a population of a lekking bird, Tetrao urogallus. For this purpose, we analysed capture-recapture and genetic data collected over a 6-year period on a spatially structured population of T. urogallus in France. Our findings revealed a strong spatial structure of relatedness in males. They also indicated that the population viscosity could allow male cooperation through two non-exclusive mechanisms. First, at their first lek attendance, males aggregate in a lek composed of relatives. Second, the distance corresponding to non-effective dispersal dramatically outweighed effective dispersal distance, which suggests that dispersers incur high post-settlement costs. These two mechanisms result in strong population genetic structuring in males. In females, our findings revealed a lower level of spatial structure of relatedness and genetic structure in respect to males. Additionally, non-effective dispersal and effective dispersal distances in females were highly similar, which suggests limited post-settlement costs. These results indicate that kin-dependent dispersal decisions and costs have a genetic footprint in wild populations and are factors that may be involved in the evolution of cooperative courtship.

Genetic mating system, population genetics and effective size of Saffron Finches breeding in southern South America

Thraupidae (Tanagers and allies) show a remarkable array of behaviors, ecologies, morphologies and plumage colors, offering a great opportunity to investigate the evolution of avian mating strategies. We characterize the population genetics and mating system of Sicalis flaveola pelzelni, a socially monogamous Neotropical songbird with biparental care. We found moderate to high levels of neutral genetic variation, similar across three breeding seasons, consistent with large and stable populations, and no temporal genetic structure. Parentage analyses of 114 adults and 198 nestlings (54 nests) revealed 31.8% of extra-pair offspring (EPO) and 51.8% of broods with at least one extra-pair chick. Extra-pair paternity (EPP) rates varied across seasons and were significantly higher in 2014/2015. Neither breeding synchrony nor pair genetic relatedness was significantly associated to EPP rates. Males paired with females in nests with and without EPO were equally heterozygous, and EPO were significantly less heterozygous than within-pair offspring, not supporting the 'indirect genetic benefits' hypotheses. Females were more related to their extra-pair mates than to their social mates, not supporting the 'inbreeding avoidance' hypothesis. The non-monogamous genetic mating system uncovered here seems not to lower the effective size of the population, which was higher than the sample size of adult breeders. We report and discuss possible cases of quasi-parasitism, as indicated by maternity exclusion patterns. We contribute novel information to expand the knowledge about the largely unexplored genetic mating systems of Thraupidae. Our findings also set the stage for further studies examining if plumage coloration or song traits predict paternity gain or loss in Saffron Finches.

The hidden costs of living in a transformed habitat: Ecological and evolutionary consequences in a tripartite mutualistic system with a keystone mistletoe

Land use change is one of the most important anthropogenic drivers of biodiversity loss. Nevertheless, the ecological and evolutionary consequences of habitat transformation remain less understood than those from habitat fragmentation. Transformed habitats are structurally simpler, altering species composition and their ecological interactions, potentially compromising gene flow and genetic diversity. We focused on a tripartite mutualistic system composed of a mistletoe (Tristerix corymbosus), its pollinator (Sephanoides sephaniodes) and its seed disperser (Dromiciops gliroides) to assess changes in their ecological and evolutionary dynamics as a result of habitat transformation. We used eight microsatellite markers to compare genetic diversity, relatedness and gene flow among five mistletoe groups inhabiting native and transformed habitats (abandoned Eucalyptus globulus plantations). We found that these groups were genetically structured, with greater allelic richness and genetic diversity in their native habitat. Also, we found higher relatedness among mistletoe individuals in transformed habitats, which varied as a function of the geographic distance among plants, probably as a result of larger resource availability, which influenced mutualist visitation rates. We did not find differences in the current migration patterns, which suggests that Tristerix corymbosus may be resilient to habitat transformation. Yet, its highly specialized interactions along with changes in its spatial configuration depict a more complex scenario, which probably impose a cost in terms of lower genetic diversity and increased relatedness that might compromise its long-term viability.