Spatial and temporal movements in Pyrenean bearded vultures (Gypaetus barbatus): Integrating movement ecology into conservation practice

Margalida, Antoni; Pérez‐García, Juan M.; Afonso, Iván; Moreno-Opo, Rubén

doi:10.1038/srep35746

Cited by 60 publications

(83 citation statements)

References 63 publications

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“…In our studied population, adult Bearded Vultures used the home‐range area intensively but relatively close to the nest locations, as indicated by the smaller home‐ranges but longer mean hourly distances moved. This pattern is similar to that found in other populations such as those in Spain and South Africa (Krüger et al , Margalida et al ). Non‐adult birds travelled longer distances during winter.…”

Section: Discussionsupporting

confidence: 91%

“…A detailed understanding of a species' movement ecology and behaviour in relation to biological and environmental factors is necessary to design and establish appropriate conservation management strategies (Morrison & Wood ). Although movement studies of the Bearded Vulture span more than three decades, they are limited to only a few mountain ranges in Europe and South Africa (Gavashelishvili & McGrady , Urios et al , Margalida et al , , Gil et al , Krüger et al , Reid et al ). Information on the movement ecology of vultures in the high‐elevation ranges of Asia is largely lacking (Alarcón & Lambertucci ).…”

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confidence: 99%

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Spatial and temporal movement of the Bearded Vulture using GPS telemetry in the Himalayas of Nepal

Subedi

Pérez‐García

Sah

et al. 2019

Ibis

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This study addresses for the first time the movement patterns of the globally near‐threatened Bearded Vulture Gypaetus barbatus in its most important stronghold, the high‐altitude mountain ranges of Asia. Tracked individuals (n = 8) in the Annapurna Himalayan range (Nepal) foraged over a vast range of 60 715.9 km2 and our results indicated age‐class differences in the use of space. Territorial adults showed very small annual home‐ranges (K90 = 150.3 km2), whereas immatures wandered extensively and covered vast ranges of the mountains (K90 = 23 930.8 km2). For adults and immatures, these values are notably larger than the other two studied populations in the world (Pyrenees and South Africa). This suggests that the studied Annapurna population might exhibit lower breeding density than in the Pyrenees or South Africa, possibly due to lower food availability.

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Section: Discussionsupporting

confidence: 91%

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confidence: 99%

Spatial and temporal movement of the Bearded Vulture using GPS telemetry in the Himalayas of Nepal

Subedi

Pérez‐García

Sah

et al. 2019

Ibis

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“…In most organisms, home‐range size is inversely related to the abundance of food (Margalida et al . ). In many habitats, food availability, abundance and distribution change under the influence of weather and season.…”

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confidence: 97%

“…Weather patterns determine the need for shelter and the accessibility of food resources (Tieleman & Williams 2000). In most organisms, home-range size is inversely related to the abundance of food (Margalida et al 2016). In many habitats, food availability, abundance and distribution change under the influence of weather and season.…”

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confidence: 99%

“…In response to such change, organisms may remain within the same home-ranges, increase or decrease home-range size, or completely move to different home-ranges. How individuals respond to habitat heterogeneity within the home-range and/ or spatial and temporal resource change will also depend on their reproductive status (Anich et al 2010), sex (Holland et al 2017) and social organization (Margalida et al 2016). Birds have been shown to increase home-range size from nonbreeding to breeding periods due to putative higher nutritional demands of the breeding season, while at the same time during breeding periods, movement is often limited and central to the location of nests (van Beest et al 2011).…”

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Home‐ranges of tropical Red‐capped Larks are influenced by breeding rather than vegetation, rainfall or invertebrate availability

Mwangi

Klaassen

Muchai

et al. 2019

Ibis

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Home‐range studies have received considerable attention from ecologists but are greatly skewed towards the north temperate areas. Tropical areas offer an ideal setting to tease apart hypotheses about weather, food availability and social interactions as important factors influencing home‐range. In this study, we investigated home‐range and movement patterns of the tropical Red‐capped Lark Callandrella cineria, a year‐round breeding bird with a dynamic social structure. We tracked 56 individuals using radiotransmitters and colour‐ring readings over a 23‐month period. Our objective was to understand year‐round variation in home‐range size in the context of the highly aseasonal and unpredictable variation in weather and resources typical of many equatorial habitats, in addition to the birds’ changing social structure and year‐round breeding. The mean composite monthly home‐range of Red‐capped Larks was 58.0 ha, and the mean individual home‐range size was 19.9 ha, but this varied considerably between individuals. The total number of nests found per month (breeding intensity) best predicted home‐range size of non‐breeding birds, and of breeding and non‐breeding birds combined. We show for the first time that breeding intensity decreases the home‐range size of non‐breeding individuals. Our study also underlines the relevance of conducting more studies in aseasonal tropical areas in order to disentangle effects of weather, food availability and breeding that vary in parallel, peaking simultaneously in most seasonal areas.

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

Oltra,

García,

Carbonell

et al. 2024

Ecology and Evolution

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Understanding the movements and mortality of individuals across different life stages is crucial for the effective conservation of wild populations. We used data from 32 Egyptian vultures (Neophron percnopterus) tagged with GPS transmitters as nestlings in three Iberian breeding areas to study their dependence period, migration routes, movements in Africa, and mortality at each stage. Our results show no significant differences in the timing of nest departure or the duration of the dependence period between individuals of different sexes or breeding nuclei. Most juveniles migrated to sub‐Saharan Africa in their first year, but some (3 of 32, 9.4%) remained in the Iberian Peninsula. Individuals that migrated to Africa did so annually, while those remaining in Iberia never migrated to the Sahel, indicating distinct migratory and non‐migratory strategies. Non‐migratory individuals consistently moved northward during the breeding season to their natal territories. Siblings did not coordinate their migration strategy or timing. All juveniles showed extensive overlap in the vast areas used in Africa, where females arrived before males, and in the Iberian Peninsula. Our study also revealed that no juveniles died immediately after fledging, but that none of the tagged individuals lived more than 7 years or were recruited as breeders. Although most casualties occurred during the longer stay in the Sahel, the mortality rate was highest during the few days of the first migration. Our results show that despite small variations in movement patterns between breeding nuclei and sexes, Egyptian vultures face similar challenges during the years before recruitment as breeders, mostly determined by their migratory strategy. These findings are relevant for designing conservation strategies, both in breeding areas and, more importantly, in wintering areas and along migration pathways. Such strategies will significantly impact the entire Iberian population of this endangered species.

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Spatial and temporal movements in Pyrenean bearded vultures (Gypaetus barbatus): Integrating movement ecology into conservation practice

Cited by 60 publications

References 63 publications

Spatial and temporal movement of the Bearded Vulture using GPS telemetry in the Himalayas of Nepal

Spatial and temporal movement of the Bearded Vulture using GPS telemetry in the Himalayas of Nepal

Home‐ranges of tropical Red‐capped Larks are influenced by breeding rather than vegetation, rainfall or invertebrate availability

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

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