Behavioral plasticity shapes population aging patterns in a long-lived avian scavenger

Proceedings of the National Academy of Sciences, Год журнала: 2024, Номер 121(35)

Опубликована: Авг. 20, 2024

Studying the mechanisms shaping age-related changes in behavior ("behavioral aging") is important for understanding population dynamics our changing world. Yet, studies that capture within-individual behavioral wild populations of long-lived animals are still scarce. Here, we used a 15-y GPS-tracking dataset social obligate scavenger, griffon vulture (

Язык: Английский

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Using GPS tracking data to validate the conservation value of bird migration counts

Biological Conservation, Год журнала: 2025, Номер 302, С. 110959 - 110959

Опубликована: Янв. 20, 2025

Язык: Английский

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The spatial consistency and repeatability of migratory flight routes and stationary sites of individual European nightjars based on multiannual GPS tracks

Movement Ecology, Год журнала: 2025, Номер 13(1)

Опубликована: Фев. 21, 2025

Abstract Background The degree to which avian migrants revisit the same sites replicate routes from previous years has received more and attention as possibilities of tracking small medium-size birds over multiple annual cycles have improved. Repeated measurements individuals with an appropriate sampling resolution can potentially inform about their navigation migration strategies what extent observed variation within between may reflect selective potential in population. Methods We analysed space-use European nightjars Caprimulgus europaeus tracked GPS-loggers northern Europe southern Africa. quantified spatial consistency stationary variation, repeatability, latitudinal correlations route choice also investigated barrier-associated changes within- between-individual longitudinal flight routes. Results found that consistently used breeding wintering sites. In contrast, generally varied years, we could only rarely confirm site fidelity stopover Nevertheless, remained low for most both autumn spring migration, while individual was larger, resulting a high repeatability Although extensive autocorrelation seasons across latitudes, detected significant associated passage ecological barriers enroute. Potential intermediate goal areas were visited prior crossing Mediterranean Sea Sahara Desert seasons. spring, within-individual variability dropped few tens kilometres at initiation but increased maximum barrier. Conclusions incorporate individual-specific space use cycle allows flexibility during possibly driven by energetic benefits allowing adaptive wind drift airborne. Our data demonstrate how topography positions influence path diminish or reinforce individuality choice. Hence, this study highlights identifying quantifying past present external influences on emergence realised be critical distinguishing genetic basis environmental migration.

Язык: Английский

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The spatiotemporal properties of artificial feeding schemes influence the post-fledging movement of Egyptian Vultures

Ornithological Applications, Год журнала: 2024, Номер 126(3)

Опубликована: Фев. 28, 2024

Abstract Many vulture populations have severely declined in the past decades, showing high juvenile mortality. To support these populations, feeding stations are used to increase food availability and supply without antibiotics toxic compounds. Yet, supplying at may affect behavior. We present a large-scale field experiment testing how different provision schemes affected movement of Egyptian Vultures (Neophron percnopterus). GPS transmitters harnessed 18 chicks described their movements post-fledging. categorized vultures into 3 groups according scheme near nests: frequent spatially dispersed (FD); non-frequent (NFD); supply, concentrated one location (FC). found that birds from all three increased roosting distances nest with fledgling age, NFD FC greater than FD group. Additionally, daily flight distances, group presenting largest smallest increase. Our findings offer new insights relevance spatiotemporal differences management show its effect on during birds’ early life stages, creating 2 main patterns: local regional. can help decide upon preferable way will either encourage or reduce dispersal fledglings, long- short-term conservation objectives. For example, post fledging period known stable resources risk anthropogenic-induced mortality, while it negatively long-term survival by hindering foraging, flight, exploring skills dispersion future breeding sites.

Язык: Английский

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Behavioural plasticity shapes population ageing patterns

Опубликована: Март 1, 2024

Studying the mechanisms shaping age-related changes in behaviour ("behavioural ageing") is important for understanding population dynamics our changing world. Yet, studies that capture within-individual behavioural wild populations of long-lived animals are still scarce. Here, we used a 15-year GPS-tracking dataset social obligate scavenger, griffon vulture (Gyps fulvus), to investigate movement and behaviours, disentangle role plasticity selection such patterns. We tracked 142 individuals up 12 years found non-linear increase site fidelity with age. This pattern resulted from throughout their life (behavioural plasticity) not selective disappearance. Mature vultures increased predictability routines spent more time at prime roosting sites compared younger individuals. Thus, adults likely have competitive advantage over conspecifics. These were mirrored behaviour. Older interacted less associates (decreasing average strength age), particularly during breeding season. Our results reveal variety ageing patterns species underscore importance Comprehensive longitudinal imperative how shape persistence animal facing human-induced environmental changes.

Язык: Английский

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Increased occurrence of Egyptian vultures in Crete: exploring movement patterns and potential for wintering

Ethology Ecology & Evolution, Год журнала: 2024, Номер 36(6), С. 663 - 678

Опубликована: Сен. 8, 2024

Язык: Английский

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Early life movements and mortality of Egyptian vultures: Implications for transcontinental conservation

Ecology and Evolution, Год журнала: 2024, Номер 14(9)

Опубликована: Сен. 1, 2024

Understanding the movements and mortality of individuals across different life stages is crucial for effective conservation wild populations. We used data from 32 Egyptian vultures (

Язык: Английский

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