1
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Gunnarsson TG, Alves JA, Gilroy JJ, Þórisson B, Sutherland WJ, Potts PM, Gill JA. Movement of juvenile migratory birds from settlement to adulthood across the non-breeding range. J Anim Ecol 2024. [PMID: 38946701 DOI: 10.1111/1365-2656.14138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Accepted: 05/07/2024] [Indexed: 07/02/2024]
Abstract
Among migratory vertebrates, high levels of fidelity to non-breeding sites during adulthood are common. If occupied sites vary in quality, strong site fidelity can have profound consequences for individual fitness and population demography. Given the prevalence of adult site fidelity, the regions of the non-breeding range to which juveniles first migrate, and the scale of any subsequent movements, are likely to be pivotal in shaping distributions and demographic processes across population ranges. However, inherent difficulties in tracking migratory individuals through early life mean that opportunities to quantify juvenile settlement and movements across non-breeding ranges, and the mechanisms involved, are extremely rare. Through long-term, range-wide resightings of hundreds of colour-marked individuals from their first migration to adulthood and the application of state-space models, we quantify levels of juvenile and adult regional-scale movements and distances at different life stages across the whole non-breeding distribution range in a migratory shorebird, the Black-tailed Godwit (Limosa limosa islandica). We show that the probability of individuals changing non-breeding regions (seven historical wintering regions spanning the Western Europe range) at all ages is very low (mean movement probability = 10.9% from first to subsequent winter, and 8.3% from first adult winter to later winters). Movement between regions was also low between autumn and winter of the same year for both juveniles (mean movement probability = 17.0%) and adults (10.4%). The great majority of non-breeding movements from the first autumn to adulthood were within regions and less than 100 km. The scarcity of regional-scale non-breeding movements from the first autumn to adulthood means that the factors influencing where juveniles settle will be key determinants of non-breeding distributions and of the rate and direction of changes in distributions.
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Affiliation(s)
| | - José A Alves
- South Iceland Research Centre, University of Iceland, Laugarvatn, Iceland
- Department of Biology & CESAM-Centre for Environmental and Marine Studies, University of Aveiro, Aveiro, Portugal
| | - James J Gilroy
- School of Biological Sciences, University of East Anglia, Norwich, UK
- School of Environmental Sciences, University of East Anglia, Norwich, UK
| | - Böðvar Þórisson
- South Iceland Research Centre, University of Iceland, Laugarvatn, Iceland
| | | | | | - Jennifer A Gill
- School of Biological Sciences, University of East Anglia, Norwich, UK
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2
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Green Ii DA. Tracking technologies: advances driving new insights into monarch migration. CURRENT OPINION IN INSECT SCIENCE 2023; 60:101111. [PMID: 37678709 DOI: 10.1016/j.cois.2023.101111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 09/01/2023] [Accepted: 09/02/2023] [Indexed: 09/09/2023]
Abstract
Understanding the rules of how monarch butterflies complete their annual North American migration will be clarified by studying them within a movement ecology framework. Insect movement ecology is growing at a rapid pace due to the development of novel monitoring systems that allow ever-smaller animals to be tracked at higher spatiotemporal resolution for longer periods of time. New innovations in tracking hardware and associated software, including miniaturization, energy autonomy, data management, and wireless communication, are reducing the size and increasing the capability of next-generation tracking technologies, bringing the goal of tracking monarchs over their entire migration closer within reach. These tools are beginning to be leveraged to provide insight into different aspects of monarch biology and ecology, and to contribute to a growing capacity to understand insect movement ecology more broadly and its impact on human life.
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Affiliation(s)
- Delbert A Green Ii
- Department of Ecology and Evolutionary Biology, University of Michigan, 1105 N University Ave, Ann Arbor, MI 48109, USA.
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3
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Nussbaumer R, Gravey M, Briedis M, Liechti F, Sheldon D. Reconstructing bird trajectories from pressure and wind data using a highly optimized hidden Markov model. Methods Ecol Evol 2023. [DOI: 10.1111/2041-210x.14082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
Affiliation(s)
- Raphaël Nussbaumer
- Cornell Lab of Ornithology Ithaca New York USA
- Swiss Ornithological Institute Sempach Switzerland
| | - Mathieu Gravey
- Department of Physical Geography, Faculty of Geosciences Utrecht University Utrecht Netherlands
| | - Martins Briedis
- Swiss Ornithological Institute Sempach Switzerland
- Lab of Ornithology Institute of Biology, University of Latvia Riga Latvia
| | - Felix Liechti
- Swiss Ornithological Institute Sempach Switzerland
- Swiss Birdradar Solutions AG Winterthur Switzerland
| | - Daniel Sheldon
- University of Massachusetts Amherst Amherst Massachusetts USA
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4
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Nussbaumer R, Gravey M, Briedis M, Liechti F. Global positioning with animal‐borne pressure sensors. Methods Ecol Evol 2023. [DOI: 10.1111/2041-210x.14043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Raphaël Nussbaumer
- Cornell Lab of Ornithology Ithaca New York USA
- Swiss Ornithological Institute Sempach Switzerland
- A Rocha Kenya Watamu Kenya
| | - Mathieu Gravey
- Department of Physical Geography, Faculty of Geosciences Utrecht University Utrecht The Netherlands
| | - Martins Briedis
- Swiss Ornithological Institute Sempach Switzerland
- Lab of Ornithology, Institute of Biology University of Latvia Riga Latvia
| | - Felix Liechti
- Swiss Ornithological Institute Sempach Switzerland
- Swiss Birdradar Solutions AG Winterthur Switzerland
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5
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Flack A, Aikens EO, Kölzsch A, Nourani E, Snell KR, Fiedler W, Linek N, Bauer HG, Thorup K, Partecke J, Wikelski M, Williams HJ. New frontiers in bird migration research. Curr Biol 2022; 32:R1187-R1199. [DOI: 10.1016/j.cub.2022.08.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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6
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Viewing animal migration through a social lens. Trends Ecol Evol 2022; 37:985-996. [PMID: 35931583 DOI: 10.1016/j.tree.2022.06.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 06/03/2022] [Accepted: 06/15/2022] [Indexed: 11/22/2022]
Abstract
Evidence of social learning is growing across the animal kingdom. Researchers have long hypothesized that social interactions play a key role in many animal migrations, but strong empirical support is scarce except in a few unique systems and species. In this review, we aim to catalyze advances in the study of social migrations by synthesizing research across disciplines and providing a framework for understanding when, how, and why social influences shape the decisions animals make during migration. Integrating research across the fields of social learning and migration ecology will advance our understanding of the complex behavioral phenomena of animal migration and help to inform conservation of animal migrations in a changing world.
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7
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Dhanjal-Adams KL, Willener AST, Liechti F. sspamlr: a toolbox for analysing animal behaviour using pressure, acceleration, temperature, magnetic or light data in R. J Anim Ecol 2022; 91:1345-1360. [PMID: 35362103 PMCID: PMC9542251 DOI: 10.1111/1365-2656.13695] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 03/09/2022] [Indexed: 11/28/2022]
Abstract
Light‐level geolocators have revolutionised the study of animal behaviour. However, lacking spatial precision, their usage has been primary targeted towards the analysis of large‐scale movements. Recent technological developments have allowed the integration of magnetometers and accelerometers into geolocator tags in addition to barometers and thermometers, offering new behavioural insights. Here, we introduce an R toolbox for identifying behavioural patterns from multisensor geolocator tags, with functions specifically designed for data visualisation, calibration, classification and error estimation. More specifically, the package allows for the flexible analysis of any combination of sensor data using k‐means clustering, expectation maximisation binary clustering, hidden Markov models and changepoint analyses. Furthermore, the package integrates tailored algorithms for identifying periods of prolonged high activity (most commonly used for identifying migratory flapping flight), and pressure changes (most commonly used for identifying dive or flight events). Finally, we highlight some of the limitations, implications and opportunities of using these methods.
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Affiliation(s)
- Kiran L Dhanjal-Adams
- Swiss ornithological institute, Seerose 1, 6204, Sempach, Switzerland.,Centre for the Advanced Study of Collective Behavior, University of Konstanz, Universitätsstraße 10, 78464, Konstanz, Germany.,Max Planck Institute of Animal Behavior, Bücklestraße 5, 78467, Konstanz, Germany
| | | | - Felix Liechti
- Swiss ornithological institute, Seerose 1, 6204, Sempach, Switzerland
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8
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Werfeli M, Ranacher P, Liechti F. Gone with the wind: inferring bird migration with light‐level geolocation, wind and activity measurements. Methods Ecol Evol 2022. [DOI: 10.1111/2041-210x.13837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mike Werfeli
- Department of Geography University of Zurich Winterthurerstrasse 190, 8057 Zurich Switzerland
- Swiss Ornithological Institute Seerose 1, 6203 Sempach Switzerland
| | - Peter Ranacher
- Department of Geography University of Zurich Winterthurerstrasse 190, 8057 Zurich Switzerland
| | - Felix Liechti
- Swiss Ornithological Institute Seerose 1, 6203 Sempach Switzerland
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9
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Linking migratory performance to breeding phenology and productivity in an Afro-Palearctic long-distance migrant. Sci Rep 2021; 11:23258. [PMID: 34853345 PMCID: PMC8636482 DOI: 10.1038/s41598-021-01734-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Accepted: 05/31/2021] [Indexed: 11/24/2022] Open
Abstract
Understanding the relationship between migratory performance and fitness is crucial for predicting population dynamics of migratory species. In this study, we used geolocators to explore migration performance (speed and duration of migratory movements, migratory timings) and its association with breeding phenology and productivity in an Afro-Palearctic insectivore, the European bee-eater (Merops apiaster), breeding in Iberian Peninsula. Bee-eaters migrated at higher travel speeds and had shorter travel duration in spring compared to autumn. Individuals that departed earlier or spent fewer days in-flight arrived earlier to the breeding areas. Our results show overall positive, but year-specific, linkages between arrival and laying dates. In one year, laying was earlier and productivity was higher, remaining constant throughout the season, while in the subsequent year productivity was lower and, importantly, declined with laying date. These results suggest that arriving earlier can be advantageous for bee-eaters, as in years when breeding conditions are favourable, early and late breeders produce high and similar number of fledglings, but when conditions are unfavourable only early breeders experience high productivity levels.
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10
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Del Mar Delgado M, Arlettaz R, Bettega C, Brambilla M, de Gabriel Hernando M, España A, Fernández-González Á, Fernández-Martín Á, Gil JA, Hernández-Gómez S, Laiolo P, Resano-Mayor J, Obeso JR, Pedrini P, Roa-Álvarez I, Schano C, Scridel D, Strinella E, Toranzo I, Korner-Nievergelt F. Spatio-temporal variation in the wintering associations of an alpine bird. Proc Biol Sci 2021; 288:20210690. [PMID: 34034515 DOI: 10.1098/rspb.2021.0690] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Many animals make behavioural changes to cope with winter conditions, being gregariousness a common strategy. Several factors have been invoked to explain why gregariousness may evolve during winter, with individuals coming together and separating as they trade off the different costs and benefits of living in groups. These trade-offs may, however, change over space and time as a response to varying environmental conditions. Despite its importance, little is known about the factors triggering gregarious behaviour during winter and its change in response to variation in weather conditions is poorly documented. Here, we aimed at quantifying large-scale patterns in wintering associations over 23 years of the white-winged snowfinch Montifringilla nivalis nivalis. We found that individuals gather in larger groups at sites with harsh wintering conditions. Individuals at colder sites reunite later and separate earlier in the season than at warmer sites. However, the magnitude and phenology of wintering associations are ruled by changes in weather conditions. When the temperature increased or the levels of precipitation decreased, group size substantially decreased, and individuals stayed united in groups for a shorter time. These results shed light on factors driving gregariousness and points to shifting winter climate as an important factor influencing this behaviour.
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Affiliation(s)
- María Del Mar Delgado
- Research Unit of Biodiversity (UMIB, UO-CSIC-PA), Oviedo University - Campus Mieres, 33600 Mieres, Spain
| | - Raphaël Arlettaz
- Division of Conservation Biology, Institute of Ecology and Evolution, University of Bern, Baltzerstrasse 6, 3012 Bern, Switzerland
| | - Chiara Bettega
- Research Unit of Biodiversity (UMIB, UO-CSIC-PA), Oviedo University - Campus Mieres, 33600 Mieres, Spain
| | - Mattia Brambilla
- LIPU/BirdLife Italia, Via Udine 3/A, I-43122, Parma, Italy.,Museo delle Scienze, Sezione Zoologia dei Vertebrati, Corso della Scienza e del Lavoro 3, 38123 Trento, Italy.,Fondazione Lombardia per l'Ambiente, Settore Biodiversità e Aree protette, Largo 10 luglio 1976 1, 20822 Seveso, MB, Italy
| | | | - Antonio España
- Grup d'anellament PARUS, Salze 36, 08186 Lliça d'Amunt, Barcelona, Spain
| | | | | | - Juan Antonio Gil
- Fundación para la Conservación del Quebrantahuesos, Plaza San Pedro Nolasco 1, 4 F, 50001 Zaragoza, Spain.,Estación Zaragoza-Delicias, Grupo Aragón de Anillamiento Científico de Aves, c/Rioja, 33, 50011 Zaragoza, Spain
| | | | - Paola Laiolo
- Research Unit of Biodiversity (UMIB, UO-CSIC-PA), Oviedo University - Campus Mieres, 33600 Mieres, Spain
| | - Jaime Resano-Mayor
- Division of Conservation Biology, Institute of Ecology and Evolution, University of Bern, Baltzerstrasse 6, 3012 Bern, Switzerland.,Grup d'anellament PARUS, Salze 36, 08186 Lliça d'Amunt, Barcelona, Spain
| | - José Ramón Obeso
- Research Unit of Biodiversity (UMIB, UO-CSIC-PA), Oviedo University - Campus Mieres, 33600 Mieres, Spain
| | - Paolo Pedrini
- Museo delle Scienze, Sezione Zoologia dei Vertebrati, Corso della Scienza e del Lavoro 3, 38123 Trento, Italy
| | | | - Christian Schano
- Swiss Ornithological Institute, Seerose 1, 6204 Sempach, Switzerland
| | - Davide Scridel
- Museo delle Scienze, Sezione Zoologia dei Vertebrati, Corso della Scienza e del Lavoro 3, 38123 Trento, Italy
| | - Eliseo Strinella
- Reparto Carabinieri Biodiversità L'Aquila, 67100 L'Aquila, Italy
| | - Ignasi Toranzo
- Grup d'anellament PARUS, Salze 36, 08186 Lliça d'Amunt, Barcelona, Spain
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11
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Emmenegger T, Alves JA, Rocha AD, Costa JS, Schmid R, Schulze M, Hahn S. Population- and age-specific patterns of haemosporidian assemblages and infection levels in European bee-eaters (Merops apiaster). Int J Parasitol 2020; 50:1125-1131. [PMID: 32866492 DOI: 10.1016/j.ijpara.2020.07.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 07/02/2020] [Accepted: 07/12/2020] [Indexed: 10/23/2022]
Abstract
Amongst other factors, host behaviour critically determines the patterns with which blood parasites occur in wild host populations. In particular, migratory hosts that sequentially occupy distant sites within and across years are expected to show distinct patterns of blood parasitism depending on their population-specific schedules and whereabouts. Here, we monitored haemosporidian parasitism in two populations of European bee-eaters (Merops apiaster), breeding in Portugal and Germany, with fundamentally different spatiotemporal migration patterns and colonisation histories. We describe and compare the composition of their parasite fauna as well as host population-, age- and sex-specific patterns in the frequency and intensity of infections. We found haemosporidian prevalence to be higher in Portugal compared with Germany and the prevalence generally increased with host age in both populations. Bee-eaters breeding in Portugal and wintering in western Africa mostly hosted parasites of the genus Haemoproteus, while Plasmodium lineages prevailed in birds breeding in Germany and wintering in central Africa. We found 18 genetic lineages, of which nine uniquely occurred in Germany, three uniquely in Portugal and six occurred in both breeding populations. The infection intensities (= % infected per inspected erythrocytes) ranged from 0.002% up to maximally 2.5% in Portugal and 9.6% in Germany. The intensity was higher in Germany compared with Portugal, vastly varied between the parasite genera (Haemoproteus > Plasmodium), but also differed between lineages of the same genus. Our results suggest that populations from different parts of a host's breeding range differ in prevalence and the composition of their haemosporidian assemblages, rather than in the intensity of their infections. Whether these patterns are mainly caused by differential habitat use throughout the annual cycle and/or the population-specific co-evolutionary backgrounds of a host species in range expansion remains to be elucidated.
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Affiliation(s)
- Tamara Emmenegger
- Department of Bird Migration, Swiss Ornithological Institute, Seerose 1, 6204 Sempach, Switzerland.
| | - José A Alves
- CESAM - Centre for Environmental and Marine Studies, Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810 193 Aveiro, Portugal; South Iceland Research Centre, University of Iceland, Lindarbraut 4, 840 Laugarvatn, Iceland
| | - Afonso D Rocha
- CESAM - Centre for Environmental and Marine Studies, Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810 193 Aveiro, Portugal
| | - Joana Santos Costa
- CESAM - Centre for Environmental and Marine Studies, Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810 193 Aveiro, Portugal
| | - Raffaella Schmid
- Department of Bird Migration, Swiss Ornithological Institute, Seerose 1, 6204 Sempach, Switzerland
| | - Martin Schulze
- RANA, Agency for Ecology and Nature Conservation, Halle/Saale, Germany
| | - Steffen Hahn
- Department of Bird Migration, Swiss Ornithological Institute, Seerose 1, 6204 Sempach, Switzerland
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12
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13
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Voigt CC, Kravchenko K, Liechti F, Bumrungsri S. Skyrocketing Flights as a Previously Unrecognized Behaviour of Open-Space Foraging Bats. ACTA CHIROPTEROLOGICA 2020. [DOI: 10.3161/15081109acc2019.21.2.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Christian C. Voigt
- Department Evolutionary Ecology Leibniz Institute for Zoo and Wildlife Research Alfred-Kowalke-Strasse 17, 10315 Berlin, Germany
| | - Kseniia Kravchenko
- Department Evolutionary Ecology Leibniz Institute for Zoo and Wildlife Research Alfred-Kowalke-Strasse 17, 10315 Berlin, Germany
| | - Felix Liechti
- Swiss Ornithological Institute, Seerose 1, CH-6204 Sempach, Switzerland
| | - Sara Bumrungsri
- Department of Biology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, Thailand
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14
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Nadal J, Ponz C, Margalida A, Pennisi L. Ecological markers to monitor migratory bird populations: Integrating citizen science and transboundary management for conservation purposes. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 255:109875. [PMID: 32063321 DOI: 10.1016/j.jenvman.2019.109875] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 11/11/2019] [Accepted: 11/14/2019] [Indexed: 06/10/2023]
Abstract
Countries share responsibility for the management and conservation of migratory bird species. However, a limited understanding of population dynamics hampers the implementation of harvest and transboundary management. Age-ratios and population density can be useful indicators to assess population dynamics to improve management and conservation actions. Here, the dynamics of an Atlantic population of Common quail Coturnix coturnix, using 32,508 quail samples and 4814 hunter questionnaires over a 20-year period (1996-2016) served as a comparative study for examining age-ratio patterns related to different geographic zones, population density and weather parameters. Results show that age-ratios varied over zones and years, specifically age-ratio 1 (AR1), used as an index of late breeding attempts, varied from 0.1 to 0.21. Age-ratio 2 (AR2), a surrogate of central recruitment, varied from 0.16 to 0.66. Finally, age-ratio 3 (AR3), used as an indicator of the population's annual breeding success, varied from 3.69 to 6.68. Age-ratio is linked to internal and external factors (i.e. effect of rainfall, variations over time and density-dependent relationships) depicting how quail age groups make segregated migration in time and space. Quail age groups perform a complex pattern of migration because of entwined changes in abundance, migration routes and timing, influencing population connectivity and dynamics. Our findings highlight the relevance of citizen science and transboundary agreements to improve management and conservation measures of migrant species. Administrations and policy-makers in developed and developing countries must coordinate efforts to engage hunters in a participatory management systems to achieve sustainability.
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Affiliation(s)
- Jesús Nadal
- Department of Animal Science, Division of Wildlife, Faculty of Life Sciences and Engineering, University of Lleida, Lleida, Spain.
| | - Carolina Ponz
- Department of Animal Science, Division of Wildlife, Faculty of Life Sciences and Engineering, University of Lleida, Lleida, Spain
| | - Antoni Margalida
- Department of Animal Science, Division of Wildlife, Faculty of Life Sciences and Engineering, University of Lleida, Lleida, Spain; Institute for Game and Wildlife Research, IREC (CSIC-UCLM-JCCM), 13005, Ciudad Real, Spain; Division of Conservation Biology, Institute of Ecology and Evolution, University of Bern, Bern, Switzerland
| | - Lisa Pennisi
- School of Natural Resources, University of Nebraska-Lincoln, Lincoln, USA
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15
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Efrat R, Hatzofe O, Nathan R. Landscape‐dependent time versus energy optimizations in pelicans migrating through a large ecological barrier. Funct Ecol 2019. [DOI: 10.1111/1365-2435.13426] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Ron Efrat
- Department of Ecology, Evolution and Behaviour, Movement Ecology Laboratory, Edmond J. Safra Campus The Hebrew University of Jerusalem Jerusalem Israel
| | - Ohad Hatzofe
- Science Division Israel Nature and Parks Authority Jerusalem Israel
| | - Ran Nathan
- Department of Ecology, Evolution and Behaviour, Movement Ecology Laboratory, Edmond J. Safra Campus The Hebrew University of Jerusalem Jerusalem Israel
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16
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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: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [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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17
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Pliocene Origin, Ice Ages and Postglacial Population Expansion Have Influenced a Panmictic Phylogeography of the European Bee-Eater Merops apiaster. DIVERSITY 2019. [DOI: 10.3390/d11010012] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Oscillations of periods with low and high temperatures during the Quaternary in the northern hemisphere have influenced the genetic composition of birds of the Palearctic. During the last glaciation, ending about 12,000 years ago, a wide area of the northern Palearctic was under lasting ice and, consequently, breeding sites for most bird species were not available. At the same time, a high diversity of habitats was accessible in the subtropical and tropical zones providing breeding grounds and refugia for birds. As a result of long-term climatic oscillations, the migration systems of birds developed. When populations of birds concentrated in refugia during ice ages, genetic differentiation and gene flow between populations from distinct areas was favored. In the present study, we explored the current genetic status of populations of the migratory European bee-eater. We included samples from the entire Palearctic-African distribution range and analyzed them via mitochondrial and nuclear DNA markers. DNA data indicated high genetic connectivity and panmixia between populations from Europe, Asia and Africa. Negative outcomes of Fu’s Fs and Tajima’s D tests point to recent expansion events of the European bee-eater. Speciation of Merops apiaster started during the Pliocene around three million years ago (Mya), with the establishment of haplotype lineages dated to the Middle Pleistocene period circa 0.7 Mya. M. apiaster, which breed in Southern Africa are not distinguished from their European counterparts, indicating a recent separation event. The diversification process of the European bee-eater was influenced by climatic variation during the late Tertiary and Quaternary. Bee-eaters must have repeatedly retracted to refugia in the Mediterranean and subtropical Africa and Asia during ice ages and expanded northwards during warm periods. These processes favored genetic differentiation and repeated lineage mixings, leading to a genetic panmixia, which we still observe today.
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Joo R, Etienne MP, Bez N, Mahévas S. Metrics for describing dyadic movement: a review. MOVEMENT ECOLOGY 2018; 6:26. [PMID: 30607247 PMCID: PMC6307229 DOI: 10.1186/s40462-018-0144-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Accepted: 12/02/2018] [Indexed: 06/09/2023]
Abstract
In movement ecology, the few works that have taken collective behaviour into account are data-driven and rely on simplistic theoretical assumptions, relying in metrics that may or may not be measuring what is intended. In the present paper, we focus on pairwise joint-movement behaviour, where individuals move together during at least a segment of their path. We investigate the adequacy of twelve metrics introduced in previous works for assessing joint movement by analysing their theoretical properties and confronting them with contrasting case scenarios. Two criteria are taken into account for review of those metrics: 1) practical use, and 2) dependence on parameters and underlying assumptions. When analysing the similarities between the metrics as defined, we show how some of them can be expressed using general mathematical forms. In addition, we evaluate the ability of each metric to assess specific aspects of joint-movement behaviour: proximity (closeness in space-time) and coordination (synchrony) in direction and speed. We found that some metrics are better suited to assess proximity and others are more sensitive to coordination. To help readers choose metrics, we elaborate a graphical representation of the metrics in the coordination and proximity space based on our results, and give a few examples of proximity and coordination focus in different movement studies.
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Affiliation(s)
- Rocio Joo
- Department of Wildlife Ecology and Conservation, Fort Lauderdale Research and Education Center, University of Florida, 3205 College Avenue, Davie, Florida, 33314 USA
- IFREMER, Ecologie et Modèles pour l’Halieutique, BP 21105, Nantes Cedex 03, 44311 France
| | | | - Nicolas Bez
- MARBEC, IRD, Ifremer, CNRS, Univ Montpellier, Sète, France
| | - Stéphanie Mahévas
- IFREMER, Ecologie et Modèles pour l’Halieutique, BP 21105, Nantes Cedex 03, 44311 France
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