Discovery of breeding grounds of a Siberian Crane <i>Grus leucogeranus</i> flock that winters in Iran, via satellite telemetry

Kanai, Yutaka; Nagendran, Meenakshi; Ueta, Mayumi; Markin, Yuri; Rinne, Juhani; Sorokin, A. V.; Higuchi, Hiroyoshi; Archibald, George W.

doi:10.1017/s0959270902002204

Cited by 11 publications

(10 citation statements)

References 6 publications

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“…Lagrangian methods, such as individualbased tracking, can be used to better understand variation in migration patterns (Baak et al, 2021), habitat use (Jodice et al, 2015;McCloskey et al, 2018;Phillips et al, 2018), and overlap with threats (Lamb et al, 2018;Isaksson et al, 2021). Tracking has identified previously unknown breeding areas (Kanai et al, 2002) and demonstrated links with distant colonies with seabirds using the nGoM (Montevecchi et al, 2012). Such information could inform population monitoring or recovery efforts and direct them towards the colonies and populations known to use the nGoM.…”

Section: Uncertaintymentioning

confidence: 99%

Seabird vulnerability to oil: Exposure potential, sensitivity, and uncertainty in the northern Gulf of Mexico

et al. 2022

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The northern Gulf of Mexico (nGoM) is a globally important region for oil extraction and supports a diverse assemblage of marine birds. Due to their frequent contact with surface waters, diverse foraging strategies, and the ease with which oil adheres to feathers, seabirds are particularly susceptible to hydrocarbon contamination. Given the chronic and acute exposure of seabirds to oiling and a lack of studies that focus on the exposure of seabirds to oiling in sub-tropical and tropical regions, a greater understanding of the vulnerability of seabirds to oil in the nGoM appears warranted. We present an oil vulnerability index for seabirds in the nGoM tailored to the current state of knowledge using new, spatiotemporally expensive vessel-based seabird observations. We use information on the exposure and sensitivity of seabirds to oil to rank seabird vulnerability. Exposure variables characterized the potential to encounter oil and gas (O&G). Sensitivity variables characterized the potential impact of seabirds interacting with O&G and are related to life history and productivity. We also incorporated uncertainty in each variable, identifying data gaps. We found that the percent of seabirds’ habitat defined as highly suitable within 10 km of an O&G platform ranged from 0%-65% among 24 species. Though O&G platforms only overlap with 15% of highly suitable seabird habitat, overlap occurs in areas of moderate to high vulnerability of seabirds, particularly along the shelf-slope. Productivity-associated sensitivity variables were primarily responsible for creating the gradient in vulnerability scores and had greater uncertainty than exposure variables. Highly vulnerable species (e.g., Northern gannet (Morus bassanus)) tended to have high exposure to the water surface via foraging behaviors (e.g., plunge-diving), older age at first breeding, and an extended incubating and fledging period compared to less vulnerable species (e.g., Pomarine jaeger (Stercorarius pomarinus)). Uncertainty related to productivity could be reduced through at-colony monitoring. Strategic seabird satellite tagging could help target monitoring efforts to colonies known to use the nGoM, and continued vessel-based observations could improve habitat characterization. As offshore energy development in the nGoM continues, managers and researchers could use these vulnerability ranks to identify information gaps to prioritize research and focal species.

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Section: Uncertaintymentioning

confidence: 99%

Seabird vulnerability to oil: Exposure potential, sensitivity, and uncertainty in the northern Gulf of Mexico

et al. 2022

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“…Surveys typically use point counts, transects, or newer technologies such as audio recording units or camera trapping to map the occurrence of a species within a focal area (Beirne et al 2017, Cooper et al 2019, Ortega-Alvarez et al 2020, Schroeder & McRae 2020. The range of a species can also be refined based on data obtained from individual tracking efforts, which may also be used to locate previously unidentified or remote breeding or nonbreeding areas (Kanai et al 2002, McCloskey et al 2018, determine residency time within an area, or identify interactions of individuals with conservation threats (Jodice et al 2015, Lamb et al 2018, Phillips et al 2018. More recently, citizen-science data, such as eBird (www.ebird.org), have been used to assist in delimitation of the geographic range of a species by providing unique sightings (Cooper et al 2019).…”

Section: Open Pen Access Ccessmentioning

confidence: 99%

Revising the marine range of the endangered black-capped petrel Pterodroma hasitata: occurrence in the northern Gulf of Mexico and exposure to conservation threats

Jodice

Michael

Gleason

et al. 2021

Endang. Species. Res.

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The black-capped petrel Pterodroma hasitata is an Endangered seabird endemic to the western North Atlantic. Although estimated at ~1000 breeding pairs, only ~100 nests have been located at 2 sites in Haiti and 3 sites in the Dominican Republic. At sea, the species primarily occupies waters of the western Gulf Stream in the Atlantic and the Caribbean Sea. Due to limited data, there is currently no consensus on the geographic marine range of the species although no current proposed ranges include the Gulf of Mexico. Here, we report on observations of black-capped petrels during 2 vessel-based survey efforts throughout the northern Gulf of Mexico from 2010-2011 and 2017-2019. During 558 d and ~54700 km of surveys, we tallied 40 black-capped petrels. Most observations occurred in the eastern Gulf, although birds were observed over much of the east-west and north-south footprint of the survey area. Predictive models indicated that habitat suitability for black-capped petrels was highest in areas associated with dynamic waters of the Loop Current. We used the extent of occurrence and area of occupancy concepts to delimit the geographic range of the species within the northern Gulf. We suggest that the marine range for black-capped petrels be modified to include the northern Gulf of Mexico, recognizing that distribution may be more clumped in the eastern Gulf and that occurrence in the southern Gulf remains unknown due to a lack of surveys there. To date, however, it remains unclear which nesting areas are linked to the Gulf of Mexico.

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“…In seabirds, tracking is commonly initiated on individuals captured at nest sites and subsequently used to map migratory paths or locate core use areas. However, tracking has also been used to attempt to locate unknown nesting areas of species captured on non-breeding grounds (Kanai et al 2002, Rayner et al 2020). Remote tracking technology is particularly well suited for seabirds captured at sea when there is no a priori assumption of possible nesting grounds, or when the potential nesting range is too broad (Rayner et al 2015, Rayner et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Temporal and spatial segregations between phenotypes of the Diablotin Black-capped PetrelPterodroma hasitataduring the breeding and non-breeding periods

Satgé

Keitt²,

Gaskin³

et al. 2022

Preprint

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Aim: Despite growing support for ecosystem-based approaches, conservation is mostly implemented at the species level. However, genetic differentiation exists within this taxonomic level, putting genetically distinct populations at risk of local extinction. In seabirds, reproductive isolation is one of the principal drivers of genetic structure. In the Diablotin Black-capped Petrel Pterodroma hasitata, an endangered gadfly petrel endemic to the Caribbean, two phenotypes have been described: a smaller dark form and a heavier light form, which are genetically distinct. We hypothesized that color forms have a similar non-breeding distribution at sea but distinct nesting distributions. Location: Western North Atlantic and northern Caribbean islands. Methods: In May 2019, we captured 5 adult Black capped Petrels of each phenotype at sea and equipped them with satellite transmitters. We used generalized linear mixed models to test the importance of phenotype and sex on geographic distribution. Using kernel density estimations, we located use areas, quantified spatial overlap between forms, and assessed form-specific exposure to marine threats. Finally, we used tracking data to estimate the distribution and timing of nesting. Results: Petrels were tracked for 11-255 d (102.1 d ±74.2). During the non-breeding period, all individuals ranged from 28.4-43.0 degrees latitude. Phenotypes had significantly distinct non-breeding distributions. In the western North Atlantic, the dark form was exposed to more marine threats than the light form. We recorded two trips (1 individual of each form) to known breeding areas, with the light form initiating breeding 1.5 months before the dark form. Main conclusions: Phenotypic differences in the Black-capped Petrel were linked to differences in nesting phenology, non-breeding marine distribution, and at-sea threat exposure. To sustain the species' representation, redundancy, and resiliency in the light of environmental changes, it is likely that the evolutionary processes that resulted in genetic differentiation will also need to be conserved.

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Discovery of breeding grounds of a Siberian Crane Grus leucogeranus flock that winters in Iran, via satellite telemetry

Cited by 11 publications

References 6 publications

Seabird vulnerability to oil: Exposure potential, sensitivity, and uncertainty in the northern Gulf of Mexico

Seabird vulnerability to oil: Exposure potential, sensitivity, and uncertainty in the northern Gulf of Mexico

Revising the marine range of the endangered black-capped petrel Pterodroma hasitata: occurrence in the northern Gulf of Mexico and exposure to conservation threats

Temporal and spatial segregations between phenotypes of the Diablotin Black-capped PetrelPterodroma hasitataduring the breeding and non-breeding periods

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