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Cigler P, Moré G, Bize P, Meier CM, Frey CF, Basso W, Keller S. Trypanosomiasis: An emerging disease in Alpine swift ( Tachymarptis melba) nestlings in Switzerland? Int J Parasitol Parasites Wildl 2024; 23:100895. [PMID: 38187443 PMCID: PMC10767487 DOI: 10.1016/j.ijppaw.2023.100895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 12/05/2023] [Accepted: 12/06/2023] [Indexed: 01/09/2024]
Abstract
Alpine swifts (Tachymarptis melba) are sub-Saharan migratory birds, which, in Switzerland, nest in colonies that have been continuously monitored for over 40 years. In the summer of 2022, despite favourable environmental conditions, an unexpectedly high number of sudden mortalities (30-80%) occurred in 20 to 45-day-old nestlings from several nesting sites, of which 3 were monitored in detail. Nestlings submitted for post-mortem analysis (n = 5) were in good body condition but exhibited extensive subcutaneous haematomas (n = 5), myocardial petechiae (n = 2) and stunted growth of primary feathers (n = 1). In all birds, 4-5 μm large, amastigote-like protozoans were identified in skeletal and cardiac muscle sections. These tissues tested positive in a PCR targeting the 18S-rRNA gene of Trypanosoma spp. Amplified sequences showed 99.63% identity with sequences of Trypanosoma corvi (JN006854 and AY461665) and Trypanosoma sp. (AJ620557, JN006841). 72 blood smears of 45-day-old nestlings from two colonies were assessed, of which 20 contained trypomastigote forms, some with high parasitaemia (highest average of 56.4 in 10 high power fields, 400x magnification). Trypomastigote morphometrics (n = 36; mean total length = 30.0 μm; length of free flagellum = 5.8 μm) were consistent with those of T. bouffardi. These findings suggest that an avian trypanosomiasis causing mass nestling mortality could be an emerging disease in Swiss Alpine swift populations.
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Affiliation(s)
- P Cigler
- Institute for Fish and Wildlife Health, University of Bern, Länggassstrasse 122, 3012 Bern, Switzerland
| | - G Moré
- Institute of Parasitology, University of Bern, Länggassstrasse 122, 3012 Bern, Switzerland
| | - P Bize
- Swiss Ornithological Institute, Seerose 1, 6204 Sempach, Switzerland
| | - C M Meier
- Swiss Ornithological Institute, Seerose 1, 6204 Sempach, Switzerland
| | - C F Frey
- Institute of Parasitology, University of Bern, Länggassstrasse 122, 3012 Bern, Switzerland
| | - W Basso
- Institute of Parasitology, University of Bern, Länggassstrasse 122, 3012 Bern, Switzerland
| | - S Keller
- Institute for Fish and Wildlife Health, University of Bern, Länggassstrasse 122, 3012 Bern, Switzerland
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2
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Hufkens K, Meier CM, Evens R, Paredes JA, Karaardiç H, Vercauteren S, Van Gysel A, Fox JW, Pacheco CM, da Silva LP, Fernandes S, Henriques P, Elias G, Costa LT, Poot M, Kearsley L. Evaluating the effects of moonlight on the vertical flight profiles of three western palaearctic swifts. Proc Biol Sci 2023; 290:20230957. [PMID: 37909073 PMCID: PMC10618867 DOI: 10.1098/rspb.2023.0957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 10/09/2023] [Indexed: 11/02/2023] Open
Abstract
Recent studies have suggested the presence of moonlight mediated behaviour in avian aerial insectivores, such as swifts. Here, we use the combined analysis of state-of-the-art activity logger data across three swift species, the common, pallid and alpine swifts, to quantify flight height and activity in responses to moonlight-driven crepuscular and nocturnal light conditions. Our results show a significant response in flight heights to moonlight illuminance for common and pallid swifts, i.e. when moon illuminance increased flight height also increased, while a moonlight-driven response is absent in alpine swifts. We show a weak relationship between night-time illuminance-driven responses and twilight ascending behaviour, suggesting a decoupling of both crepuscular and night-time behaviour. We suggest that swifts optimize their flight behaviour to adapt to favourable night-time light conditions, driven by light-responsive and size-dependent vertical insect stratification and weather conditions.
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Affiliation(s)
- Koen Hufkens
- BlueGreen Labs (bv), Kloetstraat 48, 9120 Melsele, Belgium
| | | | - Ruben Evens
- Department of Biology, Behavioural Ecology and Ecophysiology Group, University of Antwerp, Wilrijk, Belgium
| | - Josefa Arán Paredes
- Institute of Geography, University of Bern, Hallestrasse 12, 3012 Bern, Switzerland
- Oeschger Centre for Climate Change Research, University of Bern, Falkenplatz 16, 3012 Bern, Switzerland
| | - Hakan Karaardiç
- Education Faculty, Math and Science Education Department, Alanya Alaaddin Keykubat University, Alanya, Turkey
| | | | | | | | - Carlos Miguel Pacheco
- Centro de Investigação em Biodiversidade e Recursos Genéticos (CIBIO), InBIO Laboratório Associado, Universidade do Porto, 4485-661 Vairão, Portugal
| | - Luis P. da Silva
- Centro de Investigação em Biodiversidade e Recursos Genéticos (CIBIO), InBIO Laboratório Associado, Universidade do Porto, 4485-661 Vairão, Portugal
- BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, 4485-661 Vairão, Portugal
| | - Sandra Fernandes
- Department of Biology, Faculty of Sciences, Universidade do Porto, 4099-002 Porto, Portugal
| | | | - Gonçalo Elias
- 44 Rua de São Pedro, Castelo de Vide 7320-163, Portugal
| | - Luís T. Costa
- Nature Returns, Av D Sebastião 101, 2825-408 Costa da Caparica, Portugal
| | - Martin Poot
- Martin Poot Ecology, Culemborg, The Netherlands
| | - Lyndon Kearsley
- BlueGreen Labs (bv), Kloetstraat 48, 9120 Melsele, Belgium
- Belgian Ornithological Research Association, Steenweg Hulst-Lessen 29, 9140 Temse, Belgium
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3
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Ilahiane L, Colominas-Ciurò R, Bize P, Boano G, Cucco M, Ferri M, Masoero G, Meier CM, Pavia M, Ramello G, Voelker G, Pellegrino I. Molecular investigation on infection by haemosporidians in three Western Palearctic species of swift (Apodidae) and their ectoparasitic louse flies. Parasitol Res 2023:10.1007/s00436-023-07874-8. [PMID: 37233815 DOI: 10.1007/s00436-023-07874-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 05/10/2023] [Indexed: 05/27/2023]
Abstract
Swifts (Apodidae) are an unusual group of birds that spend most of their lives in flight, landing only when breeding. Although this aerial lifestyle greatly reduces their likelihood of being bitten by vectors and infected by vector-born parasites, swifts can still be heavily infested during breeding by nest-based vectors such as louse flies (Hippoboscidae). Here, we investigated host, vector, and vector-borne parasite relationships in the three most widespread swift species in the Western Palearctic (WP): common swifts (Apus apus), pallid swifts (A. pallidus), and alpine swifts (Tachymarptis melba), their nest-based louse flies (Crataerina pallida and C. melbae) and avian haemosporidians (genera Haemoproteus, Plasmodium, and Leucocytozoon). Studies of haemosporidian infections in Apodidae remain limited, with clear evidence of infection found to date in just four Neotropical and one Australasian species. The possible role of louse flies in transmitting haemosporidian infections has never been tested in swifts. We assessed the occurrence of haemosporidian infection by PCR screenings of DNA from blood samples from 34 common swifts and 44 pallid swifts from Italy, and 45 alpine swifts from Switzerland. We also screened 20 ectoparasitic louse flies present on 20 birds and identified them by both morphological features and cytochrome oxidase subunit 1 (COI) barcodes. Our results provide no evidence of haemosporidian infection in the 123 swifts tested or in the two louse fly species we identified. Our findings are consistent with available knowledge showing no haemosporidian occurrence in WP swift species and that the most likely infection route for these highly aerial species (via louse fly ectoparasites during nesting) is unlikely.
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Affiliation(s)
- Luca Ilahiane
- Dipartimento per lo Sviluppo Sostenibile e la Transizione Ecologica, University of Piemonte Orientale, Vercelli, Italy.
| | - Roger Colominas-Ciurò
- Department Ecology, Physiology & Ethology, CNRS, Institut Pluridisciplinaire Hubert Curien, University of Strasbourg, UMR, 7178, Strasbourg, France
| | - Pierre Bize
- Swiss Ornithological Institute, Sempach, Switzerland
| | - Giovanni Boano
- Museo Civico di Storia Naturale di Carmagnola, Carmagnola, Italy
| | - Marco Cucco
- Dipartimento per lo Sviluppo Sostenibile e la Transizione Ecologica, University of Piemonte Orientale, Vercelli, Italy.
| | - Mauro Ferri
- AsOER - Associazione Ornitologi Emilia-Romagna, Bologna, Italy
| | - Giulia Masoero
- Department of Biology, University of Ottawa, Ottawa, Canada
| | | | - Marco Pavia
- Museo di Geologia e Paleontologia, Dipartimento di Scienze della Terra, University of Torino, Torino, Italy
| | - Gloria Ramello
- Museo Civico di Storia Naturale di Carmagnola, Carmagnola, Italy
- Natural History Museum of Denmark, University of Copenhagen, Copenhagen, Denmark
| | - Gary Voelker
- Department of Ecology and Conservation Biology, Biodiversity Research and Teaching Collections, Texas A&M University, College Station, TX, USA
| | - Irene Pellegrino
- Dipartimento per lo Sviluppo Sostenibile e la Transizione Ecologica, University of Piemonte Orientale, Vercelli, Italy
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Müller TM, Meier CM, Knaus F, Korner P, Helm B, Amrhein V, Rime Y. Finding food in a changing world: Small-scale foraging habitat preferences of an insectivorous passerine in the Alps. Ecol Evol 2023; 13:e10084. [PMID: 37214613 PMCID: PMC10191804 DOI: 10.1002/ece3.10084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 04/20/2023] [Accepted: 04/27/2023] [Indexed: 05/24/2023] Open
Abstract
Organisms living in high-elevation habitats are usually habitat specialists who occupy a narrow ecological niche. To envision the response of alpine species to a changing environment, it is fundamental to understand their habitat preferences on multiple spatial and temporal scales. However, information on small-scale habitat use is still widely lacking. We investigated the foraging habitat preferences of the migratory northern wheatear Oenanthe oenanthe during the entire presence at a breeding site in the central Alps. We repeatedly observed 121 adult and juvenile individuals. We applied Bayesian logistic regression models to investigate which habitat characteristics influenced foraging habitat selection on a fine spatial scale, and how habitat use varied temporally. Throughout their presence on the breeding grounds, northern wheatears showed a consistent preference for a mosaic of stones and bare ground patches with slow-growing, short vegetation. The proximity of marmot burrows was preferred, whereas dense and low woody vegetation was avoided. After arrival at the breeding site, short vegetation, preferably close to the snow, was favored. The preference for open habitat patches that provide access to prey underlines the critical role of small-scale habitat heterogeneity for northern wheatears. The strong and consistent preference for a habitat that is under pressure from land-use and climate change suggests that this alpine bird species may be sensitive to habitat loss, leading to a potential range contraction. We highlight the need to conserve habitat diversity on a small spatial scale to ensure the long-term availability of suitable habitat for northern wheatears in the Alps.
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Affiliation(s)
- Thomas M. Müller
- Swiss Ornithological InstituteSempachSwitzerland
- Department of Environmental Systems SciencesSwiss Federal Institute of Technology Zurich (ETH Zurich)ZurichSwitzerland
| | | | - Florian Knaus
- Department of Environmental Systems SciencesSwiss Federal Institute of Technology Zurich (ETH Zurich)ZurichSwitzerland
| | - Pius Korner
- Swiss Ornithological InstituteSempachSwitzerland
| | - Barbara Helm
- Swiss Ornithological InstituteSempachSwitzerland
| | - Valentin Amrhein
- Swiss Ornithological InstituteSempachSwitzerland
- Department of Environmental Sciences, ZoologyUniversity of BaselBaselSwitzerland
| | - Yann Rime
- Swiss Ornithological InstituteSempachSwitzerland
- Department of Environmental Sciences, ZoologyUniversity of BaselBaselSwitzerland
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5
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Rime Y, Nussbaumer R, Briedis M, Sander MM, Chamberlain D, Amrhein V, Helm B, Liechti F, Meier CM. Multi-sensor geolocators unveil global and local movements in an Alpine-breeding long-distance migrant. Mov Ecol 2023; 11:19. [PMID: 37020307 PMCID: PMC10074645 DOI: 10.1186/s40462-023-00381-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 03/20/2023] [Indexed: 05/30/2023]
Abstract
BACKGROUND To understand the ecology of long-distance migrant bird species, it is necessary to study their full annual cycle, including migratory routes and stopovers. This is especially important for species in high-elevation habitats that are particularly vulnerable to environmental change. Here, we investigated both local and global movements during all parts of the annual cycle in a small trans-Saharan migratory bird breeding at high elevation. METHODS Recently, multi-sensor geolocators have opened new research opportunities in small-sized migratory organisms. We tagged Northern Wheatears Oenanthe oenanthe from the central-European Alpine population with loggers recording atmospheric pressure and light intensity. We modelled migration routes and identified stopover and non-breeding sites by correlating the atmospheric pressure measured on the birds with global atmospheric pressure data. Furthermore, we compared barrier-crossing flights with other migratory flights and studied the movement behaviour throughout the annual cycle. RESULTS All eight tracked individuals crossed the Mediterranean Sea, using islands for short stops, and made longer stopovers in the Atlas highlands. Single non-breeding sites were used during the entire boreal winter and were all located in the same region of the Sahel. Spring migration was recorded for four individuals with similar or slightly different routes compared to autumn. Migratory flights were typically nocturnal and characterized by fluctuating altitudes, frequently reaching 2000 to 4000 m a.s.l, with a maximum of up to 5150 m. Barrier-crossing flights, i.e., over the sea and the Sahara, were longer, higher, and faster compared to flights above favourable stopover habitat. In addition, we detected two types of altitudinal movements at the breeding site. Unexpected regular diel uphill movements were undertaken from the breeding territories towards nearby roosting sites at cliffs, while regional scale movements took place in response to local meteorological conditions during the pre-breeding period. CONCLUSION Our data inform on both local and global scale movements, providing new insights into migratory behaviour and local movements in small songbirds. This calls for a wider use of multi-sensor loggers in songbird migration research, especially for investigating both local and global movements in the same individuals.
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Affiliation(s)
- Yann Rime
- Department of Bird Migration, Swiss Ornithological Institute, Seerose 1, Sempach, CH-6204, Switzerland.
- Department of Environmental Sciences, Zoology, University of Basel, Basel, CH-4051, Switzerland.
| | | | - Martins Briedis
- Department of Bird Migration, Swiss Ornithological Institute, Seerose 1, Sempach, CH-6204, Switzerland
- Institute of Biology, University of Latvia, Riga, LV-1004, Latvia
| | - Martha Maria Sander
- Department of Life Sciences and Systems Biology, University of Turin, Via Accademia Albertina 13, Turin, IT-10123, Italy
| | - Dan Chamberlain
- Department of Life Sciences and Systems Biology, University of Turin, Via Accademia Albertina 13, Turin, IT-10123, Italy
| | - Valentin Amrhein
- Department of Environmental Sciences, Zoology, University of Basel, Basel, CH-4051, Switzerland
| | - Barbara Helm
- Department of Bird Migration, Swiss Ornithological Institute, Seerose 1, Sempach, CH-6204, Switzerland
| | - Felix Liechti
- Department of Bird Migration, Swiss Ornithological Institute, Seerose 1, Sempach, CH-6204, Switzerland
| | - Christoph M Meier
- Department of Bird Migration, Swiss Ornithological Institute, Seerose 1, Sempach, CH-6204, Switzerland
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6
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Kearsley L, Ranc N, Meier CM, Pacheco CM, Henriques P, Elias G, Poot M, Williams A, Costa LT, Helsen P, Hufkens K. The aeroecology of atmospheric convergence zones: the case of pallid swifts. OIKOS 2022. [DOI: 10.1111/oik.08594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lyndon Kearsley
- Belgian Ornithological Research Association Temse Belgium
- BlueGreen Labs Melsele Belgium
| | - Nathan Ranc
- Univ. de Toulouse, INRAE, CEFS Castanet‐Tolosan France
| | | | - Carlos Miguel Pacheco
- Research Center in Biodiversity and Genetic Resources, Univ. do Porto Vairão Portugal
| | | | | | - Martin Poot
- Martin Poot Ecology Culemborg the Netherlands
| | | | | | - Philippe Helsen
- Centre for Research and Conservation, Royal Zoological Society of Antwerp Antwerp Belgium
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7
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Mohammed TA, Meier CM, Kalvoda T, Kalt M, Rulíšek L, Shoshan MS. Potent Cyclic Tetrapeptide for Lead Detoxification. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202103217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Tagwa A. Mohammed
- Department of Chemistry University of Zurich Winterthurerstrasse 190 8057 Zurich Switzerland
| | - Christoph M. Meier
- Department of Chemistry University of Zurich Winterthurerstrasse 190 8057 Zurich Switzerland
| | - Tadeáš Kalvoda
- Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences Flemingovo náměstí 2 16610 Praha 6 Czech Republic
| | - Martina Kalt
- Department of Chemistry University of Zurich Winterthurerstrasse 190 8057 Zurich Switzerland
| | - Lubomír Rulíšek
- Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences Flemingovo náměstí 2 16610 Praha 6 Czech Republic
| | - Michal S. Shoshan
- Department of Chemistry University of Zurich Winterthurerstrasse 190 8057 Zurich Switzerland
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Mohammed TA, Meier CM, Kalvoda T, Kalt M, Rulíšek L, Shoshan MS. Potent Cyclic Tetrapeptide for Lead Detoxification. Angew Chem Int Ed Engl 2021; 60:12381-12385. [PMID: 33759306 DOI: 10.1002/anie.202103217] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Indexed: 11/05/2022]
Abstract
Lead (Pb) is a ubiquitous poisonous metal, affecting the health of vast populations worldwide. Medications to treat Pb poisoning suffer from various limitations and are often toxic owing to insufficient metal selectivity. Here, we report a cyclic tetrapeptide that selectively binds Pb and eradicates its toxic effect on the cellular level, with superior potency than state-of-the-art drugs. The Pb-peptide complex is remarkably strong and was characterized experimentally and computationally. Accompanied by the lack of toxicity and enhanced stability of this peptide, these qualities indicate its merit as a potential remedy for Pb poisoning.
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Affiliation(s)
- Tagwa A Mohammed
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Christoph M Meier
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Tadeáš Kalvoda
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo náměstí 2, 16610, Praha 6, Czech Republic
| | - Martina Kalt
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Lubomír Rulíšek
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo náměstí 2, 16610, Praha 6, Czech Republic
| | - Michal S Shoshan
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
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9
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Robinson RA, Meier CM, Witvliet W, Kéry M, Schaub M. Survival varies seasonally in a migratory bird: Linkages between breeding and non-breeding periods. J Anim Ecol 2020; 89:2111-2121. [PMID: 32383289 DOI: 10.1111/1365-2656.13250] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Accepted: 04/27/2020] [Indexed: 11/29/2022]
Abstract
Migratory species form an important component of biodiversity; they link ecosystems across the globe, but are increasingly threatened by global environmental change. Understanding and mitigating threats requires knowledge of how demographic processes operate throughout the annual cycle, but this can be difficult to achieve when breeding and non-breeding grounds are widely separated. Our goal is to quantify the importance of variability in survival during the breeding and non-breeding seasons in determining variation in annual survival using a single population and, more broadly, the extent to which annual survival across species reflects variation in probability of surviving the migratory period. We use a 25-year dataset in which individuals of a long-distance migratory bird, the alpine swift Tachymarptis melba, were captured towards the beginning and end of each breeding season to estimate age- and season-specific survival probabilities and incorporate explicit estimation of the correlations in survival between age-classes and seasons. Monthly survival was higher during the breeding period than during the rest of the year and strongly affected by conditions in the breeding season; effects that remained apparent in the following non-breeding season, but not subsequently. Recruitment of juveniles was dependent on the timing of breeding, being higher if egg-laying commenced before the median date, and substantially lower if not. Across migratory bird species, variation in annual survival largely reflects variation in the probability of surviving the migratory period. Using a double-capture approach, even within a single season, provides valuable insights into the demography of migratory species, which will help understand the extent and impacts of the threats they face in a changing world.
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Affiliation(s)
- Robert A Robinson
- Swiss Ornithological Institute, Sempach, Switzerland.,British Trust for Ornithology, Thetford, UK
| | | | | | - Marc Kéry
- Swiss Ornithological Institute, Sempach, Switzerland
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10
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Lisovski S, Bauer S, Briedis M, Davidson SC, Dhanjal-Adams KL, Hallworth MT, Karagicheva J, Meier CM, Merkel B, Ouwehand J, Pedersen L, Rakhimberdiev E, Roberto-Charron A, Seavy NE, Sumner MD, Taylor CM, Wotherspoon SJ, Bridge ES. Light-level geolocator analyses: A user's guide. J Anim Ecol 2019; 89:221-236. [PMID: 31190329 DOI: 10.1111/1365-2656.13036] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 03/30/2019] [Indexed: 11/26/2022]
Abstract
Light-level geolocator tags use ambient light recordings to estimate the whereabouts of an individual over the time it carried the device. Over the past decade, these tags have emerged as an important tool and have been used extensively for tracking animal migrations, most commonly small birds. Analysing geolocator data can be daunting to new and experienced scientists alike. Over the past decades, several methods with fundamental differences in the analytical approach have been developed to cope with the various caveats and the often complicated data. Here, we explain the concepts behind the analyses of geolocator data and provide a practical guide for the common steps encompassing most analyses - annotation of twilights, calibration, estimating and refining locations, and extraction of movement patterns - describing good practices and common pitfalls for each step. We discuss criteria for deciding whether or not geolocators can answer proposed research questions, provide guidance in choosing an appropriate analysis method and introduce key features of the newest open-source analysis tools. We provide advice for how to interpret and report results, highlighting parameters that should be reported in publications and included in data archiving. Finally, we introduce a comprehensive supplementary online manual that applies the concepts to several datasets, demonstrates the use of open-source analysis tools with step-by-step instructions and code and details our recommendations for interpreting, reporting and archiving.
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Affiliation(s)
- Simeon Lisovski
- Department of Bird Migration, Swiss Ornithological Institute, Sempach, Switzerland
| | - Silke Bauer
- Department of Bird Migration, Swiss Ornithological Institute, Sempach, Switzerland
| | - Martins Briedis
- Department of Bird Migration, Swiss Ornithological Institute, Sempach, Switzerland
| | - Sarah C Davidson
- Department of Migration, Max Planck Institute for Animal Behavior, Radolfzell, Germany.,Department of Civil, Environmental and Geodetic Engineering, The Ohio State University, Columbus, Ohio, USA.,Centre for the Advanced Study of Collective Behaviour, University of Konstanz, Konstanz, Germany.,Department of Biology, University of Konstanz, Konstanz, Germany
| | | | - Michael T Hallworth
- Migratory Bird Center, Smithsonian Conservation Biology Institute, Washington, District of Columbia, USA
| | - Julia Karagicheva
- Department of Coastal Systems, NIOZ, Royal Netherlands Institute for Sea Research, Utrecht University, Texel, The Netherlands
| | - Christoph M Meier
- Department of Bird Migration, Swiss Ornithological Institute, Sempach, Switzerland
| | - Benjamin Merkel
- Norwegian Polar Institute, Fram Centre, Tromsø, Norway, Department of Arctic and Marine Biology, University of Tromsø - The Arctic University of Norway, Tromsø, Norway
| | - Janne Ouwehand
- Conservation Ecology Group, Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, The Netherlands
| | - Lykke Pedersen
- Center for Macroecology, Evolution and Climate, Natural History Museum of Denmark, University of Copenhagen, Copenhagen, Denmark
| | - Eldar Rakhimberdiev
- Conservation Ecology Group, Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, The Netherlands.,Department of Vertebrate Zoology, Lomonosov Moscow State University, Moscow, Russia
| | | | | | | | - Caz M Taylor
- Ecology and Evolutionary Biology, Tulane University, New Orleans, Louisiana, USA
| | - Simon J Wotherspoon
- Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tasmania, Australia
| | - Eli S Bridge
- Oklahoma Biological Survey, University of Oklahoma, Norman, Oklahoma, USA
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Brlík V, Koleček J, Burgess M, Hahn S, Humple D, Krist M, Ouwehand J, Weiser EL, Adamík P, Alves JA, Arlt D, Barišić S, Becker D, Belda EJ, Beran V, Both C, Bravo SP, Briedis M, Chutný B, Ćiković D, Cooper NW, Costa JS, Cueto VR, Emmenegger T, Fraser K, Gilg O, Guerrero M, Hallworth MT, Hewson C, Jiguet F, Johnson JA, Kelly T, Kishkinev D, Leconte M, Lislevand T, Lisovski S, López C, McFarland KP, Marra PP, Matsuoka SM, Matyjasiak P, Meier CM, Metzger B, Monrós JS, Neumann R, Newman A, Norris R, Pärt T, Pavel V, Perlut N, Piha M, Reneerkens J, Rimmer CC, Roberto-Charron A, Scandolara C, Sokolova N, Takenaka M, Tolkmitt D, van Oosten H, Wellbrock AHJ, Wheeler H, van der Winden J, Witte K, Woodworth BK, Procházka P. Weak effects of geolocators on small birds: A meta-analysis controlled for phylogeny and publication bias. J Anim Ecol 2019; 89:207-220. [PMID: 30771254 DOI: 10.1111/1365-2656.12962] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 01/03/2019] [Indexed: 10/27/2022]
Abstract
Currently, the deployment of tracking devices is one of the most frequently used approaches to study movement ecology of birds. Recent miniaturization of light-level geolocators enabled studying small bird species whose migratory patterns were widely unknown. However, geolocators may reduce vital rates in tagged birds and may bias obtained movement data. There is a need for a thorough assessment of the potential tag effects on small birds, as previous meta-analyses did not evaluate unpublished data and impact of multiple life-history traits, focused mainly on large species and the number of published studies tagging small birds has increased substantially. We quantitatively reviewed 549 records extracted from 74 published and 48 unpublished studies on over 7,800 tagged and 17,800 control individuals to examine the effects of geolocator tagging on small bird species (body mass <100 g). We calculated the effect of tagging on apparent survival, condition, phenology and breeding performance and identified the most important predictors of the magnitude of effect sizes. Even though the effects were not statistically significant in phylogenetically controlled models, we found a weak negative impact of geolocators on apparent survival. The negative effect on apparent survival was stronger with increasing relative load of the device and with geolocators attached using elastic harnesses. Moreover, tagging effects were stronger in smaller species. In conclusion, we found a weak effect on apparent survival of tagged birds and managed to pinpoint key aspects and drivers of tagging effects. We provide recommendations for establishing matched control group for proper effect size assessment in future studies and outline various aspects of tagging that need further investigation. Finally, our results encourage further use of geolocators on small bird species but the ethical aspects and scientific benefits should always be considered.
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Affiliation(s)
- Vojtěch Brlík
- Institute of Vertebrate Biology, The Czech Academy of Sciences, Brno, Czech Republic.,Department of Ecology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Jaroslav Koleček
- Institute of Vertebrate Biology, The Czech Academy of Sciences, Brno, Czech Republic
| | - Malcolm Burgess
- Royal Society for the Protection of Birds-Centre for Conservation Science, The Lodge, Sandy, UK
| | - Steffen Hahn
- Bird Migration Department, Swiss Ornithological Institute, Sempach, Switzerland
| | - Diana Humple
- Point Blue Conservation Science, Petaluma, California
| | - Miloš Krist
- Department of Zoology, Faculty of Science, Palacký University, Olomouc, Czech Republic
| | - Janne Ouwehand
- Conservation Ecology Group, Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, The Netherlands
| | - Emily L Weiser
- Division of Biology, Kansas State University, Manhattan, Kansas.,U.S. Geological Survey, Upper Midwest Environmental Sciences Center, La Crosse, Wisconsin
| | - Peter Adamík
- Department of Zoology, Faculty of Science, Palacký University, Olomouc, Czech Republic.,Museum of Natural History, Olomouc, Czech Republic
| | - José A Alves
- Department of Biology and Centre for Environmental and Marine Studies, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal.,South Iceland Research Centre, University of Iceland, Laugarvatn, Iceland
| | - Debora Arlt
- Department of Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Sanja Barišić
- Institute of Ornithology, Croatian Academy of Sciences and Arts, Zagreb, Croatia
| | | | | | - Václav Beran
- Department of Zoology, Faculty of Science, Palacký University, Olomouc, Czech Republic.,Municipal Museum of Ústí nad Labem, Ústí nad Labem, Czech Republic.,ALKA Wildlife o.p.s., Dačice, Czech Republic
| | - Christiaan Both
- Conservation Ecology Group, Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, The Netherlands
| | | | - Martins Briedis
- Bird Migration Department, Swiss Ornithological Institute, Sempach, Switzerland
| | | | - Davor Ćiković
- Institute of Ornithology, Croatian Academy of Sciences and Arts, Zagreb, Croatia
| | - Nathan W Cooper
- Migratory Bird Center, Smithsonian Conservation Biology Institute, National Zoological Park, Washington, District of Columbia
| | - Joana S Costa
- Department of Biology and Centre for Environmental and Marine Studies, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
| | | | - Tamara Emmenegger
- Bird Migration Department, Swiss Ornithological Institute, Sempach, Switzerland
| | - Kevin Fraser
- Avian Behaviour and Conservation Lab, Department of Biological Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Olivier Gilg
- UMR 6249 Chrono-Environnement, Université de Bourgogne Franche-Comté, Besançon, France.,Groupe de recherche en Ecologie Arctique, Francheville, France
| | - Marina Guerrero
- Servicio de Jardines, Bosques y Huertas, Patronato de la Alhambra y el Generalife, Granada, Spain
| | - Michael T Hallworth
- Migratory Bird Center-Smithsonian Conservation Biology Institute, National Zoological Park, Washington, District of Columbia
| | - Chris Hewson
- British Trust for Ornithology, The Nunnery, Thetford, UK
| | - Frédéric Jiguet
- UMR7204 CESCO, MNHN-CNRS-Sorbonne Université, CP135, Paris, France
| | - James A Johnson
- U.S. Fish and Wildlife Service, Migratory Bird Management, Anchorage, Alaska
| | - Tosha Kelly
- Advanced Facility for Avian Research, Western University, London, Ontario, Canada
| | - Dmitry Kishkinev
- School of Natural Sciences, Bangor University, Bangor, UK.,Biological station Rybachy, Zoological Institute of Russian Academy of Sciences, Rybachy, Russia
| | | | - Terje Lislevand
- Department of Natural History, University Museum of Bergen, University of Bergen, Bergen, Norway
| | - Simeon Lisovski
- Bird Migration Department, Swiss Ornithological Institute, Sempach, Switzerland
| | - Cosme López
- Department of Zoology, Faculty of Biology, Universidad de Sevilla, Seville, Spain
| | | | - Peter P Marra
- Migratory Bird Center-Smithsonian Conservation Biology Institute, National Zoological Park, Washington, District of Columbia
| | - Steven M Matsuoka
- U.S. Fish and Wildlife Service, Migratory Bird Management, Anchorage, Alaska.,U.S. Geological Survey Alaska Science Center, Anchorage, Alaska
| | - Piotr Matyjasiak
- Department of Evolutionary Biology, Faculty of Biology and Environmental Sciences, Cardinal Stefan Wyszyński University in Warsaw, Warsaw, Poland
| | - Christoph M Meier
- Bird Migration Department, Swiss Ornithological Institute, Sempach, Switzerland
| | | | - Juan S Monrós
- Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, Paterna, València, Spain
| | | | - Amy Newman
- Department of Integrative Biology, University of Guelph, Guelph, Ontario, Canada
| | - Ryan Norris
- Department of Integrative Biology, University of Guelph, Guelph, Ontario, Canada
| | - Tomas Pärt
- Department of Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Václav Pavel
- Department of Zoology, Faculty of Science, Palacký University, Olomouc, Czech Republic.,Centre for Polar Ecology, University of South Bohemia, České Budějovice, Czech Republic
| | - Noah Perlut
- Department of Environmental Studies, University of New England, Biddeford, Maine
| | - Markus Piha
- Finnish Museum of Natural History LUOMUS, University of Helsinki, Helsinki, Finland
| | - Jeroen Reneerkens
- Conservation Ecology Group, Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, The Netherlands
| | | | - Amélie Roberto-Charron
- Avian Behaviour and Conservation Lab, Department of Biological Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Chiara Scandolara
- Bird Migration Department, Swiss Ornithological Institute, Sempach, Switzerland
| | - Natalia Sokolova
- Arctic Research Station of Institute of Plant and Animal Ecology, Ural Branch Russian Academy of Sciences, Labytnangi, Russia.,Arctic Research Center of Yamal-Nenets Autonomous District, Salekhard, Russia
| | | | | | - Herman van Oosten
- Oenanthe Ecologie, Wageningen, The Netherlands.,Institute for Water and Wetland Research, Animal Ecology, Physiology and Experimental Plant Ecology, Radboud University, Nijmegen, The Netherlands
| | - Arndt H J Wellbrock
- Institute of Biology, Department of Chemistry-Biology, Faculty of Science and Technology, University of Siegen, Siegen, Germany
| | - Hazel Wheeler
- Wildlife Preservation Canada, Guelph, Ontario, Canada
| | | | - Klaudia Witte
- Institute of Biology, Department of Chemistry-Biology, Faculty of Science and Technology, University of Siegen, Siegen, Germany
| | - Bradley K Woodworth
- School of Biological Sciences, The University of Queensland, Brisbane, Queensland, Australia
| | - Petr Procházka
- Institute of Vertebrate Biology, The Czech Academy of Sciences, Brno, Czech Republic
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Briedis M, Bauer S, Adamík P, Alves JA, Costa JS, Emmenegger T, Gustafsson L, Koleček J, Liechti F, Meier CM, Procházka P, Hahn S. A full annual perspective on sex-biased migration timing in long-distance migratory birds. Proc Biol Sci 2019; 286:20182821. [PMID: 30963841 PMCID: PMC6408886 DOI: 10.1098/rspb.2018.2821] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 01/29/2019] [Indexed: 11/12/2022] Open
Abstract
In many taxa, the most common form of sex-biased migration timing is protandry-the earlier arrival of males at breeding areas. Here we test this concept across the annual cycle of long-distance migratory birds. Using more than 350 migration tracks of small-bodied trans-Saharan migrants, we quantify differences in male and female migration schedules and test for proximate determinants of sex-specific timing. In autumn, males started migration about 2 days earlier, but this difference did not carry over to arrival at the non-breeding sites. In spring, males on average departed from the African non-breeding sites about 3 days earlier and reached breeding sites ca 4 days ahead of females. A cross-species comparison revealed large variation in the level of protandry and protogyny across the annual cycle. While we found tight links between individual timing of departure and arrival within each migration season, only for males the timing of spring migration was linked to the timing of previous autumn migration. In conclusion, our results demonstrate that protandry is not exclusively a reproductive strategy but rather occurs year-round and the two main proximate determinants for the magnitude of sex-biased arrival times in autumn and spring are sex-specific differences in departure timing and migration duration.
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Affiliation(s)
- Martins Briedis
- Department of Bird Migration, Swiss Ornithological Institute, Sempach, Switzerland
| | - Silke Bauer
- Department of Bird Migration, Swiss Ornithological Institute, Sempach, Switzerland
| | - Peter Adamík
- Department of Zoology, Palacký University, Olomouc, Czech Republic
- Museum of Natural History, Olomouc, Czech Republic
| | - José A. Alves
- Department of Biology and Centre for Environmental and Marine Studies (CESAM), University of Aveiro, Aveiro, Portugal
- South Iceland Research Centre, University of Iceland, Laugarvatn, Iceland
| | - Joana S. Costa
- Department of Biology and Centre for Environmental and Marine Studies (CESAM), University of Aveiro, Aveiro, Portugal
| | - Tamara Emmenegger
- Department of Bird Migration, Swiss Ornithological Institute, Sempach, Switzerland
| | - Lars Gustafsson
- Department of Animal Ecology/Ecology and Genetics, Uppsala University, Uppsala, Sweden
| | - Jaroslav Koleček
- Institute of Vertebrate Biology, The Czech Academy of Sciences, Brno, Czech Republic
| | - Felix Liechti
- Department of Bird Migration, Swiss Ornithological Institute, Sempach, Switzerland
| | - Christoph M. Meier
- Department of Bird Migration, Swiss Ornithological Institute, Sempach, Switzerland
| | - Petr Procházka
- Institute of Vertebrate Biology, The Czech Academy of Sciences, Brno, Czech Republic
| | - Steffen Hahn
- Department of Bird Migration, Swiss Ornithological Institute, Sempach, Switzerland
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13
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Meier CM, Karaardıç H, Aymí R, Peev SG, Bächler E, Weber R, Witvliet W, Liechti F. What makes Alpine swift ascend at twilight? Novel geolocators reveal year-round flight behaviour. Behav Ecol Sociobiol 2018; 72:45. [PMID: 29568149 PMCID: PMC5847200 DOI: 10.1007/s00265-017-2438-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 12/21/2017] [Accepted: 12/23/2017] [Indexed: 11/27/2022]
Abstract
Abstract Studying individual flight behaviour throughout the year is indispensable to understand the ecology of a bird species. Recent development in technology allows now to track flight behaviour of small long-distance bird migrants throughout its annual cycle. The specific flight behaviour of twilight ascents in birds has been documented in a few studies, but only during a short period of the year, and never quantified on the individual level. It has been suggested that twilight ascents might be a role in orientation and navigation. Previous studies had reported the behaviour only near the breeding site and during migration. We investigated year-round flight behaviour of 34 individual Alpine swifts (Apus melba) of four different populations in relation to twilight ascents. We recorded twilight ascents all around the year and found a twofold higher frequency in ascents during the non-breeding residence phase in Africa compared to all other phases of the year. Dawn ascents were twice as common as dusk ascents and occurred mainly when atmospheric conditions remained stable over a 24-h period. We found no conclusive support that twilight ascents are essential for recalibration of compass cues and landmarks. Data on the wing flapping intensity revealed that high activity at twilight occurred more regularly than the ascents. We therefore conclude that alpine swift generally increase flight activity—also horizontal flight—during the twilight period and we suppose that this increased flight activity, including ascents, might be part of social interactions between individuals. Significance statement Year-round flight altitude tracking with a light-weight multi-sensor tag reveals that Alpine swifts ascend several hundred meters high at twilight regularly. The reason for this behaviour remains unclear and the low-light conditions at this time of the day preclude foraging as a possibility. The frequency and altitude of twilight ascents were highest during the non-breeding period, intermediate during migration and low for active breeders during the breeding phase. We discuss our findings in the context of existing hypotheses on twilight ascent and we propose an additional hypothesis which links twilight ascent with social interaction between flock members. Our study highlights how flight behaviour of individuals of a migratory bird species can be studied even during the sparsely documented non-breeding period. Electronic supplementary material The online version of this article (10.1007/s00265-017-2438-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Christoph M Meier
- 1Swiss Ornithological Institute, Seerose 1, 6204 Sempach, Switzerland
| | - Hakan Karaardıç
- Elementary Science Education Department, Education Faculty, Alanya Alaaddin Keykubat University, 07400 Alanya, Turkey
| | - Raül Aymí
- Catalan Ornithological Institute, Museu de Ciències Naturals de Barcelona, Pl. Leonardo da Vinci, 4-5, 08019 Barcelona, Spain
| | - Strahil G Peev
- 4Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, 2, Gagarin Street, 1113 Sofia, Bulgaria
| | - Erich Bächler
- 1Swiss Ornithological Institute, Seerose 1, 6204 Sempach, Switzerland
| | - Roger Weber
- 5Bern University of Applied Sciences Engineering and Information Technology, Jlcoweg 1, 3400 Burgdorf, Switzerland
| | - Willem Witvliet
- Willem Witvliet, Zuidersloot 16, 1741 Broek op Langedijk, HL Netherlands
| | - Felix Liechti
- 1Swiss Ornithological Institute, Seerose 1, 6204 Sempach, Switzerland
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14
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Weiss K, Simon A, Graf N, Schöpe J, Meier CM. Clinical Practice Audit: Perioperative Antibiotic Prophylaxis in Paediatric Cancer Patients with Broviac Catheter Implantation. Klin Padiatr 2016; 228:139-44. [PMID: 27096303 DOI: 10.1055/s-0042-104415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
BACKGROUND Perioperative antimicrobial prophylaxis (PAP) is an important target for internal audits, concerning the judicious use of antibiotics. Paediatric oncology patients face an increased risk of surgical site infection (SSI) after implantation of long term central venous catheters (CVAD). PATIENTS All PATIENTS<18 years admitted to the paediatric oncology centre (POC) with implantation of a CVAD. METHODS Systematic audit in 2 groups: retrospective (Jan 01, 2012 - March 31, 2014) and prospective (April 01, 2014 - March 31, 2015) referring to an internal PAP guideline, invented in Jan 2014. Surveillance of SSI up to 30 days after the operation. RESULTS In total, 97 CVAD implantations were analysed in 89 paediatric oncology patients (Broviac in 94%). The detailed analysis of PAP revealed lower Cefuroxim doses than requested (30 vs. 50 mg/kg). In addition, Cefotaxim was used in 1 case and in 3 cases Clindamycin was given without a medical history of Penicillin hypersensitivity. In the retrospective audit group PAP was administered in 22% for≤24 h); this was the case in 91% of the prospective group (p<0.001). No SSI was detected. CONCLUSION This first comprehensive audit of PAP in a German POC outlines significant opportunities for improvement in terms of correct dosing, correct choice of the antibiotic, and shorter duration of PAP. In addition our results illustrate the challenges of optimising standard workflows in clinical practice.
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Affiliation(s)
- K Weiss
- Paediatric Hematology and Oncology, Children's Hospital Medical Center, Homburg, Germany
| | - A Simon
- Paediatric Hematology and Oncology, Children's Hospital Medical Center, Homburg, Germany
| | - N Graf
- Paediatric Hematology and Oncology, Children's Hospital Medical Center, Homburg, Germany
| | - J Schöpe
- Institute for Medical Biometry, Epidemiology and Medical Informatics, Univeristy Hospital Saarland, Homburg, Germany
| | - C M Meier
- Pediatric Surgery, Medical School of the Saarland University, Homburg, Germany
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15
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Abstract
Invasive parasites are of great global concern. Understanding the factors influencing the spread of invading pest species is a first step in developing effective countermeasures. Growing empirical evidence suggests that spread rates are essentially influenced by spatiotemporal dynamics of host-parasite interactions, yet approaches modelling spread rate have typically assumed static environmental conditions. We analysed invasion history of the deer ked (Lipoptena cervi) in Finland with a diffusion-reaction model, which assumed either the movement rate, the population growth rate, or both rates may depend on spatial and temporal distribution of moose (Alces alces), the main host of deer ked. We fitted the model to the data in a Bayesian framework, and used the Bayesian information criterion to show that accounting for the variation in local moose density improved the model's ability to describe the pattern of the invasion. The highest ranked model predicted higher movement rate and growth rate of deer ked with increasing moose density. Our results suggest that the historic increase in host density has facilitated the spread of the deer ked. Our approach illustrates how information about the ecology of an invasive species can be extracted from the spatial pattern of spread even with rather limited data.
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Affiliation(s)
- C M Meier
- Swiss Ornithological Institute, Seerose 1, CH-6204 Sempach, Switzerland
| | - D Bonte
- Terrestrial Ecology Unit, Department of Biology, Ghent University, K.L. Ledeganckstraat 35, 9000 Gent, Belgium
| | - A Kaitala
- Animal Ecology, Department of Biology, University of Oulu, P.O. Box 3000, 90014, Finland
| | - O Ovaskainen
- Metapopulation Research Group, Department of Biosciences, University of Helsinki, PO Box 65, 00014, Finland
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Molinger EL, Meier CM, Schilling MK, Kollmar O. Resection of choledochal cysts - as early as possible? Klin Padiatr 2011; 224:92-3. [PMID: 22170167 DOI: 10.1055/s-0031-1297950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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17
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Bonte D, Van Dyck H, Bullock JM, Coulon A, Delgado M, Gibbs M, Lehouck V, Matthysen E, Mustin K, Saastamoinen M, Schtickzelle N, Stevens VM, Vandewoestijne S, Baguette M, Barton K, Benton TG, Chaput-Bardy A, Clobert J, Dytham C, Hovestadt T, Meier CM, Palmer SCF, Turlure C, Travis JMJ. Costs of dispersal. Biol Rev Camb Philos Soc 2011; 87:290-312. [DOI: 10.1111/j.1469-185x.2011.00201.x] [Citation(s) in RCA: 840] [Impact Index Per Article: 64.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Blanckenhorn WU, Birrer M, Meier CM, Reim C, Teuschl Y, Weibel D. Size-Dependent Mating Success at Various Nutritional States in the Yellow Dung Fly. Ethology 2008. [DOI: 10.1111/j.1439-0310.2008.01521.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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20
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Meier CM, Tsokas J, Willital GH. [Electron microscopy assessment of the effectiveness of intraoperative laser in reoperation of juvenile bone cysts]. Langenbecks Arch Chir Suppl Kongressbd 1999; 115:1163-4. [PMID: 9931823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
The application of the ND-YAG-Laser in juvenile bone cysts prevents recurrencies. That can be put down to the fact that the laser has a deep action which destroys the organells of the cystic tissue up to 2-4 mm irreversibly. By this the whole cystic tissue is being destroyed and recurrencies are being prevented.
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Affiliation(s)
- C M Meier
- Klinik und Poliklinik für Kinder- und Neugeborenenchirurgie, Westfälische Wilhelms-Universität, Münster
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21
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Stevenson M, Haggerty S, Lamonica CA, Meier CM, Welch SK, Wasiak AJ. Integration is not necessary for expression of human immunodeficiency virus type 1 protein products. J Virol 1990; 64:2421-5. [PMID: 2157898 PMCID: PMC249408 DOI: 10.1128/jvi.64.5.2421-2425.1990] [Citation(s) in RCA: 157] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
A common feature in the life cycle of cytocidal retroviruses, including human immunodeficiency virus type 1 (HIV-1), is the accumulation of large amounts of unintegrated viral DNA. As yet, the role of unintegrated viral DNA in the cytopathogenesis of cytocidal retrovirus infections remains unresolved. HIV-1 mutants which were deleted in the integrase/endonuclease gene and which were unable to establish an integrated form of the virus were constructed. Despite an inability to integrate, these mutants were fully competent templates for HIV-1 core and envelope antigen production. HIV-1 antigen could be detected in the supernatants of lymphocyte cultures infected with HIV-1 integrase mutants. However, an inability to rescue infectious virus from these cultures indicated that HIV-1 integration was required for the production of infectious HIV-1. On the basis of the ability of unintegrated HIV-1 DNA to serve as a template for HIV-1 antigen production, it is plausible that unintegrated viral DNA can contribute to the HIV-1 antigen pool during HIV-1 replication.
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Affiliation(s)
- M Stevenson
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha 68105-1065
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