Stephen C. Votier
University of Exeter
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Publications 117
Abstract Fisheries bycatch is one of the biggest threats to seabird populations. Managers need to identify where and when bycatch occurs and ensure effective action. In 1999, the Food and Agriculture Organization of the United Nations released the International Plan of Action for Reducing Incidental Catch of Seabirds in Longline Fisheries (IPOA-s) encouraging states to voluntarily assess potential seabird bycatch problems and implement a National Plan of Action (NPOA) if needed. However, the IPO...
#1Kayleigh A Jones (University of Exeter)
#2Hannah Wood (BAS: British Antarctic Survey)
Last. Iain J. Staniland (BAS: British Antarctic Survey)H-Index: 22
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#1Ian D. Jonsen (Macquarie University)H-Index: 27
#2Toby A. PattersonH-Index: 20
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State-space models are important tools for quality control of error-prone animal movement data. The near real-time (within 24 h) capability of the Argos satellite system aids dynamic ocean management of human activities by informing when animals enter intensive use zones. This capability also facilitates use of ocean observations from animal-borne sensors in operational ocean forecasting models. Such near real-time data provision requires rapid, reliable quality control to deal with error-prone ...
#1Anthony W. J. Bicknell (University of Exeter)H-Index: 11
#2Benjamin W. Walker (University of Exeter)
Last. Stephen C. Votier (University of Exeter)H-Index: 37
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Introduced mammals have devastated island nesting seabird populations worldwide. Declines in breeding seabirds on St Kilda, UK, have been linked to climate change and predation from great skuas Stercorarius skuas, but the introduced St Kilda field mouse Apodemus sylvaticus hirtensis may also play a role by feeding on adults, chicks or eggs. Here, we use stable isotopes in St Kilda mouse blood and potential dietary items to investigate their foraging ecology, specifically focussing on the importa...
#1Bethany L. Clark (University of Exeter)H-Index: 2
#2Freydís Vigfúsdóttir (University of Iceland)H-Index: 2
Last. Stephen C. Votier (University of Exeter)H-Index: 37
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#1Kayleigh A. Jones (BAS: British Antarctic Survey)
#2Norman Ratcliffe (BAS: British Antarctic Survey)H-Index: 23
Last. Iain J. Staniland (BAS: British Antarctic Survey)H-Index: 22
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Competition for resources within a population can lead to niche partitioning between sexes, throughout ontogeny and among individuals, allowing con-specifics to co-exist. We aimed to quantify such partitioning in Antarctic fur seals, Arctocephalus gazella, breeding at South Georgia, which hosts ~95% of the world’s population. Whiskers were collected from 20 adult males and 20 adult females and stable isotope ratios were quantified every 5 mm along the length of each whisker. Nitrogen isotope rat...
Diet analyses can reveal important changes in seabird foraging ecology and, by inference, resource availability and predator–prey dynamics within the wider marine ecosystem. Here, we analysed stomach contents of 1544 grey-headed albatross Thalassarche chrysostoma (GHA) and black-browed albatross T. melanophris (BBA) chicks from Bird Island, South Georgia. We describe dietary shifts (1996–2017), and link those to annual prey availability indices and breeding success. Annual variability in diet wa...
#1Richard B. Sherley (University of Exeter)H-Index: 12
#2Hannah Ladd‐Jones (University of Exeter)
Last. Stephen C. Votier (University of Exeter)H-Index: 37
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#1Katherine Westerberg (University of Exeter)
Last. Stephen C. Votier (University of Exeter)H-Index: 37
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ABSTRACTCapsule: Great Black-backed Gulls Larus marinus breeding on Skokholm, UK, fed predominantly on seabirds, rabbits, refuse, and marine prey, with the majority of pairs being dietary generalis...
#1Rhiannon E. Austin (University of Liverpool)
#2Russell B. Wynn (NOCS: National Oceanography Centre, Southampton)H-Index: 34
Last. Tim Guilford (University of Oxford)H-Index: 40
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Patterns of behavioural variation and migratory connectivity are important characteristics of populations, particularly at the edges of species distributions, where processes involved in influencing evolutionary trajectories, such as divergence, mutual persistence, and natural hybridization, can occur. Here, we focused on two closely related seabird species that breed in the Mediterranean: Balearic shearwaters (Puffinus mauretanicus) and Yelkouan shearwaters (Puffinus yelkouan). Genetic and phen...
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