Feeding ecology of white-chinned petrels: diet and their diving patterns around South Georgia
Dissertação de mestrado em Biologia, apresentada ao Departamento Ciências da vida da Faculdade de Ciências e Tecnologia da Universidade de Coimbra. White-chinned petrels, Procellaria aequinoctialis, are one of the most abundant pelagic seabirds in the Southern Ocean and have the highest incidental m...
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ftunivcoimbra:oai:estudogeral.sib.uc.pt:10316/24978 2023-05-15T14:00:29+02:00 Feeding ecology of white-chinned petrels: diet and their diving patterns around South Georgia Sue-Anne, Bloom Ramos, Jaime Xavier, José Carlos Caetano 2012 http://hdl.handle.net/10316/24978 eng eng http://hdl.handle.net/10316/24978 info:eu-repo/semantics/openAccess Conservação Dieta Mortalidade acidenta Padrões de mergulho Painhos-de-queixo-branco South Georgia info:eu-repo/semantics/masterThesis 2012 ftunivcoimbra 2022-08-11T13:57:56Z Dissertação de mestrado em Biologia, apresentada ao Departamento Ciências da vida da Faculdade de Ciências e Tecnologia da Universidade de Coimbra. White-chinned petrels, Procellaria aequinoctialis, are one of the most abundant pelagic seabirds in the Southern Ocean and have the highest incidental mortality rate by long-line fisheries in the region. Tracking results on this population have shown that their foraging areas cover the waters around South Georgia, Scotia Sea and sub-Antarctic waters to the Patagonian shelf. However, much information on their diet and activity patterns is needed to better understand their foraging ecology in relation to fisheries and thus provide valuable information for the conservation of this species. The diet has been broadly characterized previously using breeding birds caught at the colonies, however, no diet information is available from white-chinned petrels caught out at sea, caught accidently by fishing vessels, including the cephalopod part of the diet. As cephalopods are poorly known in the Southern Ocean, and they have no Antarctic fisheries targeting them, understanding their importance in the diet of these seabirds can contribute to our understanding of how white-chinned petrels catch prey (in this case cephalopods) naturally. The diving and activity patterns of white-chinned petrels, related to their feeding ecology, are, also, poorly understood. This species possibly feed by seizing live prey from the surface, by surface plunging and they are also excellent divers. As they are also scavengers, potentially feeding on bait and discards from longline fishing vessels, they may become vulnerable species due to possible attraction to fishing vessels and are known to being caught accidently by longline hooks. The objectives of this study will be to characterize the diet of white-chinned petrels caught in South Georgian waters onboard of longline fishing vessels, in two different years (2002 and 2004), assess diving patterns of white-chinned petrels, from colonies on Bird ... Master Thesis Antarc* Antarctic Scotia Sea Southern Ocean Universidade de Coimbra: Estudo Geral Antarctic Scotia Sea Southern Ocean |
institution |
Open Polar |
collection |
Universidade de Coimbra: Estudo Geral |
op_collection_id |
ftunivcoimbra |
language |
English |
topic |
Conservação Dieta Mortalidade acidenta Padrões de mergulho Painhos-de-queixo-branco South Georgia |
spellingShingle |
Conservação Dieta Mortalidade acidenta Padrões de mergulho Painhos-de-queixo-branco South Georgia Sue-Anne, Bloom Feeding ecology of white-chinned petrels: diet and their diving patterns around South Georgia |
topic_facet |
Conservação Dieta Mortalidade acidenta Padrões de mergulho Painhos-de-queixo-branco South Georgia |
description |
Dissertação de mestrado em Biologia, apresentada ao Departamento Ciências da vida da Faculdade de Ciências e Tecnologia da Universidade de Coimbra. White-chinned petrels, Procellaria aequinoctialis, are one of the most abundant pelagic seabirds in the Southern Ocean and have the highest incidental mortality rate by long-line fisheries in the region. Tracking results on this population have shown that their foraging areas cover the waters around South Georgia, Scotia Sea and sub-Antarctic waters to the Patagonian shelf. However, much information on their diet and activity patterns is needed to better understand their foraging ecology in relation to fisheries and thus provide valuable information for the conservation of this species. The diet has been broadly characterized previously using breeding birds caught at the colonies, however, no diet information is available from white-chinned petrels caught out at sea, caught accidently by fishing vessels, including the cephalopod part of the diet. As cephalopods are poorly known in the Southern Ocean, and they have no Antarctic fisheries targeting them, understanding their importance in the diet of these seabirds can contribute to our understanding of how white-chinned petrels catch prey (in this case cephalopods) naturally. The diving and activity patterns of white-chinned petrels, related to their feeding ecology, are, also, poorly understood. This species possibly feed by seizing live prey from the surface, by surface plunging and they are also excellent divers. As they are also scavengers, potentially feeding on bait and discards from longline fishing vessels, they may become vulnerable species due to possible attraction to fishing vessels and are known to being caught accidently by longline hooks. The objectives of this study will be to characterize the diet of white-chinned petrels caught in South Georgian waters onboard of longline fishing vessels, in two different years (2002 and 2004), assess diving patterns of white-chinned petrels, from colonies on Bird ... |
author2 |
Ramos, Jaime Xavier, José Carlos Caetano |
format |
Master Thesis |
author |
Sue-Anne, Bloom |
author_facet |
Sue-Anne, Bloom |
author_sort |
Sue-Anne, Bloom |
title |
Feeding ecology of white-chinned petrels: diet and their diving patterns around South Georgia |
title_short |
Feeding ecology of white-chinned petrels: diet and their diving patterns around South Georgia |
title_full |
Feeding ecology of white-chinned petrels: diet and their diving patterns around South Georgia |
title_fullStr |
Feeding ecology of white-chinned petrels: diet and their diving patterns around South Georgia |
title_full_unstemmed |
Feeding ecology of white-chinned petrels: diet and their diving patterns around South Georgia |
title_sort |
feeding ecology of white-chinned petrels: diet and their diving patterns around south georgia |
publishDate |
2012 |
url |
http://hdl.handle.net/10316/24978 |
geographic |
Antarctic Scotia Sea Southern Ocean |
geographic_facet |
Antarctic Scotia Sea Southern Ocean |
genre |
Antarc* Antarctic Scotia Sea Southern Ocean |
genre_facet |
Antarc* Antarctic Scotia Sea Southern Ocean |
op_relation |
http://hdl.handle.net/10316/24978 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766269657706135552 |