Differential responses to weather and land‐cover conditions explain spatial variation in winter abundance trends in a migratory bird of conservation concern DOI Open Access
Alexander R. Schindler, Anthony D. Fox, Christopher K. Wikle

et al.

Journal of Applied Ecology, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 22, 2024

Abstract Effective conservation strategies for animal populations require knowledge of relationships between population dynamics and their environmental drivers. However, these processes often vary within populations, requiring site‐specific planning. Given limited financial resources, identifying groups sites with similar can help practitioners efficiently implement programs to larger areas. We evaluated spatial patterns drivers wintering site trends in a migratory bird concern, the Greenland white‐fronted goose ( Anser albifrons flavirostris ). used latent class analysis identify trend 35 years abundance data among 59 geographically discrete sites. developed state‐space model Bayesian framework quantify effects weather land‐cover conditions experienced throughout spring migration, summer breeding, autumn migration periods on variation abundance. identified two main trends: northeastern declined average by 3% per year, while southwestern 14% year. Differential responses habitat likely explained groups, as geese at were more negatively affected harsh (e.g. low temperatures high precipitation breeding areas) poor (i.e. low‐quality grasslands croplands) Future efforts improve suitability nutritional quality agricultural areas, especially cereal croplands early winter late spring, could potentially local conditions, where declines steepest. Synthesis applications . demonstrate potential delineate based using long‐term monitoring data, which are commonly only available practitioners. By grouping trends, we further test hypotheses about how differentially changing conditions. This information is important informing efficient planning over large areas when resources limited.

Language: Английский

Influence of local (air temperature) and wide-scale (North Atlantic Oscillation) climate indices on the first arrival dates of the Common Wood Pigeon (Columba palumbus) at breeding site in SE Poland DOI
Krzysztof Bartoszek,

Waldemar Biaduń,

Dariusz Jakubas

et al.

International Journal of Biometeorology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 27, 2025

Language: Английский

Citations

0
Migratory microbiomes: the role of the gut microbiome in bird migration eco‐physiology DOI Creative Commons
Pablo Capilla‐Lasheras, Alice Risely

Journal of Avian Biology, Journal Year: 2025, Volume and Issue: 2025(2)

Published: March 1, 2025

Long‐distance bird migration is one of the most metabolically and immunologically challenging feats in animal kingdom, with birds often needing to double their weight a matter days facing increased exposure novel pathogens. The physiological behavioural adaptations required survive such journeys may be facilitated by gut microbiome, diverse community symbiotic microbes that produce rare nutrients, fatty acids, immune compounds can confer rapid changing environmental conditions. However, causal role microbiome regulating physiology remains mystery. In this review, we synthesize current knowledge composition function during migration, outline possible mechanisms which changes could benefit migrants, identify future research priorities. We find active usually associated reduced diversity expansion several study‐specific taxa. Additionally, some microbial traits have been found correlate host condition fat deposits migration. there little understanding how relate parameters, molecular linking or underlying ecological, dietary, intrinsic drivers across migratory cycle. Our review draws from examples non‐migratory systems explore microbiomes adaptively regulate relevant highlight need for studies connect circulating metabolites experimental test metabolite dynamics controlled settings. Given its demands ubiquity, presents an excellent model system investigate adaptive potential natural populations.

Language: Английский

Citations

0
Non-breeding conditions induce carry-over effects on survival of migratory birds DOI
Nathan W. Cooper, Scott W. Yanco, Clark S. Rushing

et al.

Current Biology, Journal Year: 2024, Volume and Issue: 34(21), P. 5097 - 5103.e3

Published: Oct. 4, 2024

Language: Английский

Citations

3
Framework for assessing species vulnerability whilst on migration to a spatially explicit anthropogenic pressure DOI Creative Commons

Ros M.W. Green,

Niall H. K. Burton, Aonghais S. C. P. Cook

et al.

Biological Conservation, Journal Year: 2025, Volume and Issue: 307, P. 111118 - 111118

Published: April 17, 2025

Language: Английский

Citations

0
Long‐term monitoring reveals sex‐ and age‐related survival patterns in griffon vultures DOI Creative Commons
Guillermo Gómez‐López, J. F. A. Soltero, Ana Sanz‐Aguilar

et al.

Journal of Zoology, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 6, 2024

Abstract Survival is a key demographic parameter for long‐lived bird species as it strongly influences their population dynamics and persistence. In recent decades, several studies have focused on unravelling differential patterns of survival by sex or age in populations, each group may be affected different ecological anthropogenic pressures. Vultures are highly threatened birds where age‐ especially sex‐dependent been understudied, therefore, obtaining robust estimates understanding which factors modulate them crucial developing management conservation strategies. Here, we used long‐term dataset (1990–2023) from wild colony griffon vultures Gyps fulvus central Spain capture‐mark‐recapture framework to address potential sex‐ age‐mediated apparent resighting. Resighting probabilities were lower individuals first year life than older individuals. Apparent increased with generally higher males females, particularly subadults. Disentangling whether an unequal between sexes due female‐biased dispersal true mortality necessary understand able implement adequate actions. Our research underlines the importance considering interactions analyses long‐lived, usually species.

Language: Английский

Citations

2
Annual variation of adult survival of a south-temperate House Wren population in Argentina DOI Creative Commons
Gustavo J. Fernández, Mariana E. Carro, Paulo E. Llambías

et al.

Avian Research, Journal Year: 2024, Volume and Issue: 15, P. 100180 - 100180

Published: Jan. 1, 2024

Identifying factors affecting the survival of individuals is essential for understanding evolution life-history traits and population dynamics. Despite numerous studies on this subject in north-temperate environments, there a lack equivalent at similar latitudes south. Here, we used 14-year dataset capture, banding, resighting to estimate annual variation apparent adult probability south-temperate House Wrens (Troglodytes aedon bonariae). We evaluated temporal effect environmental (climatic) demographic variables (adult abundance, total number fledglings produced during each breeding season) estimators. found that decreased as abundance adults increased. This density-dependent could be related resident lifestyle southern Wrens, which determine an intense competition territories resources ultimately would affect their survival.

Language: Английский

Citations

1
Early life movements and mortality of Egyptian vultures: Implications for transcontinental conservation DOI Creative Commons
Juan Oltra, Javier García,

Isidoro Carbonell

et al.

Ecology and Evolution, Journal Year: 2024, Volume and Issue: 14(9)

Published: Sept. 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 (

Language: Английский

Citations

1
Annual survival rates of satellite-tracked adult European honey buzzards (Pernis apivorus) based on the Kaplan-Meier estimator and its probabilistic extension DOI Creative Commons
Bernd‐Ulrich Meyburg,

Benno Gries

Raptor Journal, Journal Year: 2024, Volume and Issue: 18(1), P. 15 - 24

Published: March 1, 2024

Abstract The annual survival rate of adult raptors is an important parameter in population dynamics and needed to derive measures for stability conservation management. Here we studied European honey buzzards ( Pernis apivorus ), a migratory land bird, using satellite telemetry throughout the year up three years. We used Kaplan-Meier method estimation combination with distribution density function survival. This describes number survivors N as time t, based on SR. probabilistic extension estimator results simple that does not require commercial statistical program extract rates from event analysis. It can be applied analysing any event-time data, only but also ring recoveries, demonstrated example. average our study, permanent monitoring, was 0.44/year (linear correlation factor f = 0.99). implies mortality 0.56 per year. seems particularly unfavourable weather conditions during crossing Sahara Mediterranean led this high birds migration 2001 2011, likely vary greatly However, loss wintering area high, at one third birds. More need tracked assess factors affecting threats populations adequately.

Language: Английский

Citations

0
Differential changes in the morphology and fuel loads of obligatory and partial migrant passerines over half a century in Britain DOI Creative Commons

Holly Pickett,

Robert A. Robinson, Robert L. Nudds

et al.

Movement Ecology, Journal Year: 2024, Volume and Issue: 12(1)

Published: Sept. 2, 2024

Abstract Migratory distances and stopover locations are changing for many passerines in response to climate change. Morphological changes have been linked rising global temperatures both migrants residents, but the implications of these on fuel loads, associated flight ranges little studied. Wing length body mass between 1964 2020 were calculated 15 migrant partially Britain. Changes load lean also estimated used predict ranges. Twelve species undergone morphological eight species, changes. Nine reduced ranges, indicating that not compensated fully reduction range experienced since 1964. Partial showed greater decreases than did full migrants, which may indicate behavioural plasticity former. Those do adapt morphologically or behaviourally be unable complete long migrations, resulting restriction sub-optimal breeding/wintering habitats, a need sooner first stop more stops en route. This highlights importance conserving migratory sites, particularly Mediterranean North Africa immediately precede major geographical barriers, as-well-as breeding wintering grounds.

Language: Английский

Citations

0
Can waterfowl buffer the mortality risk induced by GPS tags? A cautionary tale for applied inference across species DOI Creative Commons
Casey M. Setash, Adam C. Behney, James H. Gammonley

et al.

Animal Biotelemetry, Journal Year: 2024, Volume and Issue: 12(1)

Published: Sept. 17, 2024

Language: Английский

Citations

0