1
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Gomez-Maldonado S, Calleros A, Salazar-Rueda I, Camacho-Cervantes M. The invasive twospot livebearer's biology, and its current and potential global distribution. JOURNAL OF FISH BIOLOGY 2023; 103:854-863. [PMID: 37321972 DOI: 10.1111/jfb.15483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 06/15/2023] [Indexed: 06/17/2023]
Abstract
Poeciliids are widely recognized as successful invaders, possessing traits associated with invasion success. Native to Central America and south-eastern Mexico, the twospot livebearer (Pseudoxiphophorus bimaculatus) is a species recently recognized as invasive in both Central and northern Mexico. Despite its invasive status, limited research exists on its invasion process and the potential threats it poses to native species. In this study, we conducted a comprehensive review of the current knowledge on the twospot livebearer and mapped its current and potential distribution worldwide. The twospot livebearer shares similar traits with other successful invaders within the same family. Notably, it exhibits high fecundity throughout the year and demonstrates resilience to highly polluted and oxygen-deprived water conditions. This fish serves as a host for several parasites, including generalists, and has been extensively translocated for commercial purposes. Recently, it has also been used for biocontrol within its native range. Apart from existing outside its native range, the twospot livebearer, under current climate conditions and if transported there, could readily colonize biodiversity hotspots in tropical zones worldwide, including the Caribbean Islands, the Horn of Africa, North of Madagascar Island, south-eastern Brazil, and others located in southern and eastern Asia. Given that this fish is highly plastic and our Species Distribution Model, we consider that all areas with a habitat suitability >0.2 should prevent its arrival and establishment. Our findings underscore the urgent need to recognize this species as a threat to freshwater native topminnows and prevent its introduction and spread.
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Affiliation(s)
- Sebastian Gomez-Maldonado
- Instituto de Ciencias del Mar y Limnologia, Universidad Nacional Autonoma de Mexico, Ciudad Universitaria, Mexico City, Mexico
| | - Adrian Calleros
- Escuela Nacional de Estudios Superiores Unidad Morelia, Universidad Nacional Autonoma de Mexico, Morelia, Mexico
| | - Isabel Salazar-Rueda
- Instituto de Ciencias del Mar y Limnologia, Universidad Nacional Autonoma de Mexico, Ciudad Universitaria, Mexico City, Mexico
| | - Morelia Camacho-Cervantes
- Instituto de Ciencias del Mar y Limnologia, Universidad Nacional Autonoma de Mexico, Ciudad Universitaria, Mexico City, Mexico
- School of Biological Sciences, Monash University, Melbourne, Victoria, Australia
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2
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Seebacher F, Bamford SM, Le Roy A. Sex-specific transgenerational plasticity: developmental temperatures of mothers and fathers have different effects on sons and daughters. J Exp Biol 2023; 226:jeb245798. [PMID: 37293931 DOI: 10.1242/jeb.245798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2023] [Accepted: 06/01/2023] [Indexed: 06/10/2023]
Abstract
Each parent can influence offspring phenotype via provisioning of the zygote or sex-specific DNA methylation. Transgenerational plasticity may therefore depend on the environmental conditions experienced by each parent. We tested this hypothesis by conducting a fully factorial experiment across three generations of guppies (Poecilia reticulata), determining the effects of warm (28°C) and cold (21°C) thermal backgrounds of mothers and fathers on mass and length, and thermal performance (sustained and sprint swimming speeds, citrate synthase and lactate dehydrogenase activities; 18, 24, 28, 32 and 36°C test temperatures) of sons and daughters. Offspring sex was significant for all traits except for sprint speed. Warmer mothers produced sons and daughters with reduced mass and length, and warmer fathers produced shorter sons. Sustained swimming speed (Ucrit) of male offspring was greatest when both parents were raised at 28°C, and warmer fathers produced daughters with greater Ucrit. Similarly, warmer fathers produced sons and daughters with greater metabolic capacity. We show that the thermal variation experienced by parents can modify offspring phenotype, and that predicting the impacts of environmental change on populations would require knowledge of the thermal background of each mother and father, particularly where sexes are spatially segregated.
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Affiliation(s)
- Frank Seebacher
- School of Life and Environmental Sciences, Heydon-Laurence Building A08, University of Sydney, Sydney, NSW 2006, Australia
| | - Stephanie M Bamford
- School of Life and Environmental Sciences, Heydon-Laurence Building A08, University of Sydney, Sydney, NSW 2006, Australia
| | - Amelie Le Roy
- School of Life and Environmental Sciences, Heydon-Laurence Building A08, University of Sydney, Sydney, NSW 2006, Australia
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3
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Allibhai I, Zanghi C, How MJ, Ioannou CC. Increased water temperature and turbidity act independently to alter social behavior in guppies (
Poecilia reticulata
). Ecol Evol 2023; 13:e9958. [PMID: 37006888 PMCID: PMC10049887 DOI: 10.1002/ece3.9958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 03/04/2023] [Accepted: 03/13/2023] [Indexed: 03/30/2023] Open
Abstract
Changes in environmental conditions can shift the costs and benefits of aggregation or interfere with the sensory perception of near neighbors. This affects group cohesion with potential impacts on the benefits of collective behavior such as reduced predation risk. Organisms are rarely exposed to one stressor in isolation, yet there are only a few studies exploring the interactions between multiple stressors and their effects on social behavior. Here, we tested the effects of increased water temperature and turbidity on refuge use and three measures of aggregation in guppies (Poecilia reticulata), increasing temperature and turbidity in isolation or in combination. When stressors were elevated in isolation, the distribution of fish within the arena as measured by the index of dispersion became more aggregated at higher temperatures but less aggregated when turbidity was increased. Another measure of cohesion at the global scale, the mean inter-individual distance, also indicated that fish were less aggregated in turbid water. This is likely due to turbidity acting as a visual constraint, as there was no evidence of a change in risk perception as refuge use was not affected by turbidity. Fish decreased refuge use and were closer to their nearest neighbor at higher temperatures. However, the nearest neighbor distance was not affected by turbidity, suggesting that local-scale interactions can be robust to the moderate increase in turbidity used here (5 NTU) compared with other studies that show a decline in shoal cohesion at higher turbidity (>100 NTU). We did not observe any significant interaction terms between the two stressors, indicating no synergistic or antagonistic effects. Our study suggests that the effects of environmental stressors on social behavior may be unpredictable and dependent on the metric used to measure cohesion, highlighting the need for mechanistic studies to link behavior to the physiology and sensory effects of environmental stressors.
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Affiliation(s)
| | | | - Martin J. How
- School of Biological SciencesUniversity of BristolBristolUK
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4
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Jessop A, Deacon A, Barbosa M. The effect of phenotypic heterogeneity on behaviours linked to invasive success. Ethology 2023. [DOI: 10.1111/eth.13356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Aaron Jessop
- Centre for Biological Diversity, School of Biology University of St Andrews St Andrews UK
| | - Amy Deacon
- Department of Life Sciences The University of West Indies St Augustine Trinidad and Tobago
| | - Miguel Barbosa
- Centre for Biological Diversity, School of Biology University of St Andrews St Andrews UK
- Department of Biology & CESAM University of Aveiro Aveiro Portugal
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5
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Effect of a temperature gradient on the behaviour of an endangered Mexican topminnow and an invasive freshwater fish. Sci Rep 2022; 12:20584. [PMID: 36446867 PMCID: PMC9709034 DOI: 10.1038/s41598-022-24755-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 11/21/2022] [Indexed: 12/03/2022] Open
Abstract
Climate change and biological invasions are two of the major threats to biodiversity. They could act synergistically to the detriment of natives as non-native species may be more plastic and resilient when facing changing environments. The twoline skiffia (Skiffia bilineata) is an endangered Mexican topminnow that cohabits with invasive guppies (Poecilia reticulata) in some areas in central Mexico. Guppies have been found to take advantage from associating with the twoline skiffia and are considered partially responsible for the decline of its populations. Refuge use and exploratory behaviours are trade-offs between being safe from the unknown and the opportunity to explore novel areas in search for better resources or to disperse. The aim of this study is to investigate how a change in temperature affects the refuge use and exploratory behaviours for both species. We found that temperature affects the refuge use of twoline skiffias, and the swimming activity of both species. Skiffias explored the rock more than guppies regardless of the temperature scenario. Also, smaller fish spent more time performing exploratory behaviours than bigger ones. Our study is the first to test the effect of temperature on the refuge use and exploratory behaviour of a goodeid species, and our results contribute to the idea that some natives could be more affected by climate change than some invaders.
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6
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Coexistence with an invasive species in the context of global warming lead to behavioural changes via both hereditary and ontogenetic adjustments to minimise conflict. Acta Ethol 2022. [DOI: 10.1007/s10211-022-00402-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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7
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Auer SK, Agreda E, Chen AH, Irshad M, Solowey J. Late-stage pregnancy reduces upper thermal tolerance in a live-bearing fish. J Therm Biol 2021; 99:103022. [PMID: 34420649 DOI: 10.1016/j.jtherbio.2021.103022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 04/23/2021] [Accepted: 05/30/2021] [Indexed: 10/21/2022]
Abstract
Upper thermal limits are considered a key determinant of a population's ability to persist in the face of extreme heat events. However, these limits differ considerably among individuals within a population, and the mechanisms underlying this differential sensitivity are not well understood. Upper thermal tolerance in aquatic ectotherms is thought to be determined by a mismatch between oxygen supply and the increased metabolic demands associated with warmer waters. As such, tolerance is expected to decline during reproduction given the heightened oxygen demand for gamete production and maintenance. Among live-bearing species, upper thermal tolerance of reproductive adults may decline even further after fertilization due to the cost of meeting the increasing oxygen demands of developing embryos. We examined the upper thermal tolerance of live-bearing female Trinidadian guppies at different stages of reproduction and found that critical thermal maximum was similar during the egg yolking and early embryos stage but then declined by almost 0.5 °C during late pregnancy when oxygen demands are the greatest. These results are consistent with the hypothesis that oxygen limitation sets thermal limits and show that reproduction is associated with a decline in upper thermal tolerance.
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8
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Santiago-Arellano A, Palomera-Hernandez V, Camacho-Cervantes M. Con- and Heterospecific Shoaling Makes Invasive Guppies More Risk Taking. Front Ecol Evol 2021. [DOI: 10.3389/fevo.2021.624245] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Invasive species are one of the greatest threats to biodiversity. Behavioral traits are recognized as key to promote individual’s survival in changing conditions. For social species being part of a group is key to carry out vital activities. Heterospecific social environments could provide exotic species with the opportunity to join groups and gain the advantages of being part of a larger population. Short latency to exit a refuge is a behavioral response that could be linked to invasion success as it increases the chances of individuals to locate food sources and other resources in novel environments. The guppy (Poecilia reticulata), a successful invader, has been found to take advantage of the presence of native species to reduce its refuge emergence latency and acquire information. The research was carried out in Mexico, we investigated the effect of heterospecific social contexts that include natives and other invasive viviparous fishes on guppies’ refuge emergence latency. We found that guppies’ emergence latency was shorter when accompanied by another guppy than when alone. Their latency was also shorter when with other invaders and when with native goodeids, but with one of the invaders (Pseudoxiphophorus bimaculatus) and with goodeids (Skiffia bilineata) latency reduction was not as high as when with conspecifics or with the invader Poecilia gracilis. Our experiment supports both the idea that already established invaders could provide benefits to new ones, and that native species also provide benefits but less than invaders. Increasing our knowledge about conspecific and heterospecific social interactions that could make an exotic species become invasive is key to assess the invasion risk of a community.
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9
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Wiles SC, Bertram MG, Martin JM, Tan H, Lehtonen TK, Wong BBM. Long-Term Pharmaceutical Contamination and Temperature Stress Disrupt Fish Behavior. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:8072-8082. [PMID: 32551542 DOI: 10.1021/acs.est.0c01625] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Natural environments are subject to a range of anthropogenic stressors, with pharmaceutical pollution being among the fastest-growing agents of global change. However, despite wild animals living in complex multi-stressor environments, interactions between pharmaceutical exposure and other stressors remain poorly understood. Accordingly, we investigated effects of long-term exposure to the pervasive pharmaceutical contaminant fluoxetine (Prozac) and acute temperature stress on reproductive behaviors and activity levels in the guppy (Poecilia reticulata). Fish were exposed to environmentally realistic fluoxetine concentrations (measured average: 38 or 312 ng/L) or a solvent control for 15 months using a mesocosm system. Additionally, fish were subjected to one of three acute (24 h) temperature treatments: cold stress (18 °C), heat stress (32 °C), or a control (24 °C). We found no evidence for interactive effects of fluoxetine exposure and temperature stress on guppy behavior. However, both stressors had independent impacts. Fluoxetine exposure resulted in increased male coercive copulatory behavior, while fish activity levels were unaffected. Under cold-temperature stress, both sexes were less active and males exhibited less frequent reproductive behaviors. Our results demonstrate that long-term exposure to a common pharmaceutical pollutant and acute temperature stress alter fundamental fitness-related behaviors in fish, potentially shifting population dynamics in contaminated ecosystems.
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Affiliation(s)
- Sarah C Wiles
- School of Biological Sciences, Monash University, Melbourne, Victoria 3800, Australia
| | - Michael G Bertram
- School of Biological Sciences, Monash University, Melbourne, Victoria 3800, Australia
- Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, Umeå, 901 83, Sweden
| | - Jake M Martin
- School of Biological Sciences, Monash University, Melbourne, Victoria 3800, Australia
| | - Hung Tan
- School of Biological Sciences, Monash University, Melbourne, Victoria 3800, Australia
| | - Topi K Lehtonen
- School of Biological Sciences, Monash University, Melbourne, Victoria 3800, Australia
- Ecology and Genetics Research Unit, Faculty of Science, University of Oulu, Oulu, 90570, Finland
| | - Bob B M Wong
- School of Biological Sciences, Monash University, Melbourne, Victoria 3800, Australia
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10
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Grinder RM, Bassar RD, Auer SK. Upper thermal limits are repeatable in Trinidadian guppies. J Therm Biol 2020; 90:102597. [DOI: 10.1016/j.jtherbio.2020.102597] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 04/09/2020] [Accepted: 04/13/2020] [Indexed: 10/24/2022]
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11
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Manfredini F, Arbetman M, Toth AL. A Potential Role for Phenotypic Plasticity in Invasions and Declines of Social Insects. Front Ecol Evol 2019. [DOI: 10.3389/fevo.2019.00375] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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12
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Sibeaux A, Cole GL, Endler JA. Success of the receptor noise model in predicting colour discrimination in guppies depends upon the colours tested. Vision Res 2019; 159:86-95. [PMID: 30981675 DOI: 10.1016/j.visres.2019.04.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 03/30/2019] [Accepted: 04/01/2019] [Indexed: 02/04/2023]
Abstract
Accurate knowledge of species colour discrimination is fundamental to explain colour based behaviours and the evolution of colour patterns. We tested how the receptor noise limited model, widely used in behavioural ecology, matched actual colour discrimination thresholds obtained using behavioural tests. Guppies (Poecilia reticulata) were first trained to push a target coloured disk placed among eight grey disks of various luminances on a grey plate. Guppies were then tested to find target disks, which varied in colour contrast from the plate. The target disks followed a gradient going from high contrast to inconspicuous against the grey background. We plotted the percentage of correct choices of each colour in the gradient against the model prediction and determined the discrimination thresholds using the inflection point of the fitted sigmoid curve. We performed the experiment on six colour gradients: red, orange, yellow, green, blue and purple. Four colour gradients: red, orange, green and blue, showed a discrimination threshold that matched the model predictions. However, deviations of the model for the yellow and purple gradients suggest that ecological relevance of some colours could affect decision-making in behavioural tests and that we can no longer assume that the rules for colour discrimination are independent of colours.
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Affiliation(s)
- Adélaïde Sibeaux
- Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Waurn Ponds, VIC 3216, Australia.
| | - Gemma L Cole
- Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Waurn Ponds, VIC 3216, Australia
| | - John A Endler
- Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Waurn Ponds, VIC 3216, Australia
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13
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Órfão I, Barbosa M, Ojanguren AF, Vicente L, Varela SAM, Magurran AE. Me against who? Male guppies adjust mating behaviour according to their rival’s presence and attractiveness. Ethology 2019. [DOI: 10.1111/eth.12864] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Inês Órfão
- CFCUL – Centro de Filosofia das Ciências da Universidade de Lisboa, Faculdade de Ciências Universidade de Lisboa Lisboa Portugal
- cE3c – Centre for Ecology, Evolution and Environmental Changes, Faculdade de Ciências Universidade de Lisboa Lisboa Portugal
- Centre for Biological Diversity, School of Biology University of St Andrews St Andrews UK
| | - Miguel Barbosa
- Centre for Biological Diversity, School of Biology University of St Andrews St Andrews UK
- CESAM – Centro de Estudos do Ambiente e do Mar Universidade de Aveiro Aveiro Portugal
| | - Alfredo F. Ojanguren
- Centre for Biological Diversity, School of Biology University of St Andrews St Andrews UK
| | - Luís Vicente
- CFCUL – Centro de Filosofia das Ciências da Universidade de Lisboa, Faculdade de Ciências Universidade de Lisboa Lisboa Portugal
| | - Susana A. M. Varela
- cE3c – Centre for Ecology, Evolution and Environmental Changes, Faculdade de Ciências Universidade de Lisboa Lisboa Portugal
- IGC – Instituto Gulbenkian de Ciência Oeiras Portugal
| | - Anne E. Magurran
- Centre for Biological Diversity, School of Biology University of St Andrews St Andrews UK
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14
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Órfão I, Ojanguren AF, Barbosa M, Vicente L, Varela SA, Magurran AE. How pre- and postcopulatory sexual selection influence male mating decisions in a promiscuous species. Anim Behav 2018. [DOI: 10.1016/j.anbehav.2017.12.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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15
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Characterization and spatial relationships of the hepatic vascular–biliary tracts, and their associated pancreocytes and macrophages, in the model fish guppy ( Poecilia reticulata ): A study of serial sections by light microscopy. Tissue Cell 2018; 50:104-113. [DOI: 10.1016/j.tice.2017.12.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Revised: 12/17/2017] [Accepted: 12/27/2017] [Indexed: 12/23/2022]
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16
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Mohammed RS, Reynolds M, James J, Williams C, Mohammed A, Ramsubhag A, van Oosterhout C, Cable J. Getting into hot water: sick guppies frequent warmer thermal conditions. Oecologia 2016; 181:911-7. [PMID: 26965895 PMCID: PMC4912592 DOI: 10.1007/s00442-016-3598-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2015] [Accepted: 02/28/2016] [Indexed: 12/24/2022]
Abstract
Ectotherms depend on the environmental temperature for thermoregulation and exploit thermal regimes that optimise physiological functioning. They may also frequent warmer conditions to up-regulate their immune response against parasite infection and/or impede parasite development. This adaptive response, known as 'behavioural fever', has been documented in various taxa including insects, reptiles and fish, but only in response to endoparasite infections. Here, a choice chamber experiment was used to investigate the thermal preferences of a tropical freshwater fish, the Trinidadian guppy (Poecilia reticulata), when infected with a common helminth ectoparasite Gyrodactylus turnbulli, in female-only and mixed-sex shoals. The temperature tolerance of G. turnbulli was also investigated by monitoring parasite population trajectories on guppies maintained at a continuous 18, 24 or 32 °C. Regardless of shoal composition, infected fish frequented the 32 °C choice chamber more often than when uninfected, significantly increasing their mean temperature preference. Parasites maintained continuously at 32 °C decreased to extinction within 3 days, whereas mean parasite abundance increased on hosts incubated at 18 and 24 °C. We show for the first time that gyrodactylid-infected fish have a preference for warmer waters and speculate that sick fish exploit the upper thermal tolerances of their parasites to self medicate.
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Affiliation(s)
- Ryan S Mohammed
- School of Biosciences, Cardiff University, Cardiff, CF10 3TL, UK.,Department of Life Sciences, Faculty of Science and Technology, University of the West Indies, Mona, Trinidad and Tobago
| | - Michael Reynolds
- School of Biosciences, Cardiff University, Cardiff, CF10 3TL, UK
| | - Joanna James
- School of Biosciences, Cardiff University, Cardiff, CF10 3TL, UK
| | - Chris Williams
- National Fisheries Services, Environment Agency, Brampton, Cambridgeshire, PE28 4NE, UK
| | - Azad Mohammed
- Department of Life Sciences, Faculty of Science and Technology, University of the West Indies, Mona, Trinidad and Tobago
| | - Adesh Ramsubhag
- Department of Life Sciences, Faculty of Science and Technology, University of the West Indies, Mona, Trinidad and Tobago
| | - Cock van Oosterhout
- School of Environmental Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - Jo Cable
- School of Biosciences, Cardiff University, Cardiff, CF10 3TL, UK.
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17
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Kent M, Ojanguren AF. The effect of water temperature on routine swimming behaviour of new born guppies (Poecilia reticulata). Biol Open 2015; 4:547-52. [PMID: 25750437 PMCID: PMC4400596 DOI: 10.1242/bio.20149829] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Accepted: 11/27/2014] [Indexed: 11/30/2022] Open
Abstract
Guppies have successfully established populations in places with thermal regimes very different from the Tropical conditions in their native range. This indicates a remarkable capacity for thermal adaptation. Given their vulnerability to predation as juveniles, acute changes in temperature, which can alter predator-prey relationships, can impact juvenile survival and have amplified consequences at the population level. To understand how temperature may impact juvenile survival and gain insight into their success as an invasive species, we researched the effect of acute temperature changes on the routine swimming behaviour of juvenile guppies. Using a novel 3-dimensional tracking technique, we calculated 4 routine swimming parameters, speed, depth, and variation in speed or depth, at 6 different test temperatures (17, 20, 23, 26, 29, or 32°C). These temperatures cover their natural thermal range and also extended past it in order to include upper and lower thermal limits. Using model selection, we found that body length and temperature had a significant positive relationship with speed. Variation in speed decreased with rising temperatures and fish swam slightly closer to the bottom at higher temperatures. All juveniles increased variation in depth at higher temperatures, though larger individuals maintained slightly more consistent depths. Our results indicate that guppies have a large thermal range and show substantial plasticity in routine swimming behaviours, which may account for their success as an invasive species.
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Affiliation(s)
- Maud Kent
- Centre for Biological Diversity, Scottish Oceans Institute, University of St Andrews, KY16 8LB, Scotland, UK
| | - Alfredo F Ojanguren
- Centre for Biological Diversity, Scottish Oceans Institute, University of St Andrews, KY16 8LB, Scotland, UK
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18
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Kolluru GR, Walz J, Hanninen AF, Downey K, Kalbach B, Gupta S, Earley RL. Exploring behavioral and hormonal flexibility across light environments in guppies from low-predation populations. BEHAVIOUR 2015. [DOI: 10.1163/1568539x-00003264] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Phenotypic flexibility is essential for organisms to respond to changing environments. Guppies experience light environments that alter their visibility to conspecifics and predators. We used guppies from populations with low rates of predation by fish, but which may be subject to avian predators, to test the hypotheses that conspicuous behaviors and the androgens that mediate them are reduced under high light, and that cortisol levels are increased under high light because the perceived risk is stressful. We found reduced courtship, potentially driven by the reduced female response to courtship, under high light. Aggression and testosterone levels were higher in the absence of females. We found elevated androgen and decreased cortisol levels following social interactions, but no relationship between hormones and behavior, and no influence of light level on hormones. We forward explanations for these results and advocate understanding the flexible response to light environments in a range of guppy populations.
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Affiliation(s)
- Gita R. Kolluru
- aBiological Sciences Department, California Polytechnic State University, San Luis Obispo, CA 93407, USA
| | - Julia Walz
- aBiological Sciences Department, California Polytechnic State University, San Luis Obispo, CA 93407, USA
| | - Amanda F. Hanninen
- bDepartment of Biological Sciences, University of Alabama, Tuscaloosa, AL, USA
- cDepartment of Biology, University of Virginia, Charlottesville, VA, USA
| | - Kate Downey
- aBiological Sciences Department, California Polytechnic State University, San Luis Obispo, CA 93407, USA
| | - Brandy Kalbach
- aBiological Sciences Department, California Polytechnic State University, San Luis Obispo, CA 93407, USA
| | - Shelly Gupta
- aBiological Sciences Department, California Polytechnic State University, San Luis Obispo, CA 93407, USA
| | - Ryan L. Earley
- bDepartment of Biological Sciences, University of Alabama, Tuscaloosa, AL, USA
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