Confirmed year-round residence and land roosting of Whiskered Auklets (<i>Aethia pygmaea</i>) at Buldir Island, Alaska

Schacter, Carley R.; Jones, Ian L.

doi:10.1642/auk-17-235.1

Cited by 13 publications

(16 citation statements)

References 38 publications

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“…But the rhinoceros auklet nests in large colonies, is mainly neritic, and exhibits extensive genetic structuring. Those same traits are also characteristic of the whiskered auklet [111], a species that forages in tide-rips close to shore [111], and a species in which birds outfitted with geolocator tags attended the breeding colony year-round [112]. Neritic seabirds might tend to structure extensively because they conform to a one-dimensional, stepping-stone model of dispersal [105], and/or because they are unlikely to come into contact at sea with individuals from populations other than their own [79].…”

Section: Plos Onementioning

confidence: 91%

“…First, the ancient murrelet is panmictic across the North Pacific Ocean [82], and geolocator tagging revealed that some individuals crossed from the eastern into the western Pacific in the winter [81]. Second, population genetic structure exists in the whiskered auklet [111], and geolocator tagging showed that individuals in this species overwinter close to breeding colonies [112]. Third, the winter distribution of most Cassin's auklets breeding on two very large colonies in British Columbia (Triangle, Frederick islands) overlapped with that of individuals from Southeast Farallon Island in California [117,118], and the two groups are genetically homogeneous [50].…”

Section: Plos Onementioning

confidence: 99%

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Geolocator tagging links distributions in the non-breeding season to population genetic structure in a sentinel North Pacific seabird

et al. 2020

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We tested the hypothesis that segregation in wintering areas is associated with population differentiation in a sentinel North Pacific seabird, the rhinoceros auklet (Cerorhinca monocerata). We collected tissue samples for genetic analyses on five breeding colonies in the western Pacific Ocean (Japan) and on 13 colonies in the eastern Pacific Ocean (California to Alaska), and deployed light-level geolocator tags on 12 eastern Pacific colonies to delineate wintering areas. Geolocator tags were deployed previously on one colony in Japan. There was strong genetic differentiation between populations in the eastern vs. western Pacific Ocean, likely due to two factors. First, glaciation over the North Pacific in the late Pleistocene might have forced a southward range shift that historically isolated the eastern and western populations. And second, deep-ocean habitat along the northern continental shelf appears to act as a barrier to movement; abundant on both sides of the North Pacific, the rhinoceros auklet is virtually absent as a breeder in the Aleutian Islands and Bering Sea, and no tagged birds crossed the North Pacific in the non-breeding season. While genetic differentiation was strongest between the eastern vs. western Pacific, there was also extensive differentiation within both regional groups. In pairwise comparisons among the eastern Pacific colonies, the standardized measure of genetic differentiation (FꞌST) was negatively correlated with the extent of spatial overlap in wintering areas. That result supports the hypothesis that segregation in the non-breeding season is linked to genetic structure. Philopatry and a neritic foraging habit probably also contribute to the structuring. Widely distributed, vulnerable to anthropogenic stressors, and exhibiting extensive genetic structure, the rhinoceros auklet is fully indicative of the scope of the conservation challenges posed by seabirds.

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Section: Plos Onementioning

confidence: 91%

Section: Plos Onementioning

confidence: 99%

Geolocator tagging links distributions in the non-breeding season to population genetic structure in a sentinel North Pacific seabird

et al. 2020

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“…We inferred from this pattern that the tagged birds traveled way and back from the colony on consecutive trips of short length (≈ 2-4 days) and short range (≈ 100-300 km) at the east of the colony, with length and range depending on the sex of the individuals and on the time of the year. GLS data have been only rarely used to demonstrate resident behaviour [6]. Existing studies have dealt with staging behaviour and most of them have estimated habitat zones by applying kernel density estimation (KDE) on a scatter of lightderived positions [56,57].…”

Section: Gls Data and Resident Behaviourmentioning

confidence: 99%

Did the animal move? A cross-wavelet approach to geolocation data reveals year-round whereabouts of a resident seabird.

Roy

Delord

Nunes

et al. 2020

Preprint

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Background Considerable progress in our understanding of long-distance migration has been achieved thanks to the use of small lightweight geolocator devices. Such global location sensors (GLS) are particularly suitable for studying non-breeding movement and behaviour due to their small size and low energy consumption allowing multiyear deployment. Errors of geolocation are however important, difficult to estimate, have a complex structure leading to poor precision and accuracy. Therefore, understanding movement ecology of short-distance migrants or resident birds during extensive time periods remains challenging. We aimed at elucidating the sex-specific marine space uses of a resident tropical seabird, the masked booby over the full annual life cycle, including the breeding and non-breeding periods. Methods A total of 34 GLS were deployed on male and female masked boobies at the Fernando de Noronha archipelago (Brazil), and 31 of them were recovered and provided year-round data. Error range of geographical positions and habitat use of masked boobies were estimated from light-derived positions and temperature data. Synchronicity between movement and saltwater immersion data was investigated through a wavelet analysis. Results Masked boobies showed a resident behaviour over their entire annual cycle. We inferred from the wavelet analysis that birds traveled way and back from the colony on consecutive trips of short length (approx 2-4 days) and short range (approx 100-300 km) at the east of the colony. Trip duration and range depended on the sex of the individual and on the time of the year. Females had farther ranges than males during the pre-breeding period. Trip duration increased gradually from the end of the breeding period to the post-breeding period, probably due to the release of the central-place breeding constraints. Conclusions Despite inherent limits of light-based geolocation, synchronicity analysis of geolocation data revealed year round whereabouts of a resident tropical seabird and sex-specific movement behaviour. Such an approach based on the estimation of synchronicity between light-based coordinates data and any other external data (behavioural or environmental) could be used more broadly to investigate resident or short-migrants animal movement based on GLS data.

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“…Birds in particular, including seabirds have great mobility and navigation skills, and many migratory birds are able to travel over long distances, to occupy distant areas at dierent seasons, returning repeatedly to the same localities from year to year (Egevang et al, 2010;González-Solís et al, 2007;Shaer et al, 2006;Stenhouse et al, 2012;Weimerskirch and Wilson, 2000;Wilson et al, 1998). In opposition, other seabirds can be referred as resident (or sedentary) when their distribution and center of distribution remain more or less the same all year round, and from year to year (Newton, 2008;Schacter and Jones, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Residency behaviour is thus of great interest for future investigations into the topic of population resilience. Current knowledge of seabird residency is however principally based on direct observations (Jaquemet et al, 2004;Olson et al, 2001), and to our knowledge few studies aimed at conrming or elucidating year-round behaviour in a resident seabird using tracking devices (Schacter and Jones, 2018).…”

Section: Introductionmentioning

confidence: 99%

Did The Animal Move? A Cross-Wavelet Approach to Qeolocation Data Reveals Year-Round Whereabouts of A Resident Seabird

Roy

Delord

Nunes

et al. 2021

Preprint

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Considerable progress in our understanding of long-distance migration has been achieved thanks to the use of small lightweight geolocator devices (GLS). Errors of geolocation are however important, difficult to estimate, have a complex structure leading to poor precision and accuracy. Thus, the study of short-distance migrants or resident birds remains challenging. Here we aimed at elucidating the sex-specific marine space uses of a resident tropical seabird, the masked booby ( Sula dactylatra ) over the full annual life cycle at the Fernando de Noronha archipelago (Brazil), using GLS and synchronicity analyses between movement and saltwater immersion data. Masked boobies (n = 31) showed a resident behaviour over their entire annual cycle. We inferred from the wavelet analysis that birds traveled way and back from the colony on consecutive trips of short length (~ 2-4 days) and short range (~ 100-300 km) from the east of the colony. Duration and range of trips depended on the sex of the individual and on the time of the year. Trip duration increased gradually from the end of the breeding period to the post-breeding period, probably due to the release of the central-place breeding constraints. During the pre-breeding period, females had farther ranges eastward and spent more time in water than males. Despite inherent limits of light-based geolocation, synchronicity analysis of geolocation data revealed year round whereabouts of the resident tropical masked booby and sex-specific movement behaviour, which could be used more broadly to investigate resident or short-migrants animal movement based on GLS data.

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Confirmed year-round residence and land roosting of Whiskered Auklets (Aethia pygmaea) at Buldir Island, Alaska

Cited by 13 publications

References 38 publications

Geolocator tagging links distributions in the non-breeding season to population genetic structure in a sentinel North Pacific seabird

Geolocator tagging links distributions in the non-breeding season to population genetic structure in a sentinel North Pacific seabird

Did the animal move? A cross-wavelet approach to geolocation data reveals year-round whereabouts of a resident seabird.

Did The Animal Move? A Cross-Wavelet Approach to Qeolocation Data Reveals Year-Round Whereabouts of A Resident Seabird

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