Foraging behaviour of the Sooty Albatross in relation to climatic variability and fisheries
As top predators, seabirds occupy the upper trophic level of marine ecosystems. They are consequently important for the maintenance of ecosystem structure and function, while also possessing characteristics which are useful for identifying climate-driven changes in oceanography at all trophic levels...
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ftrhodesunivcory:vital:53383 2023-05-15T13:37:51+02:00 Foraging behaviour of the Sooty Albatross in relation to climatic variability and fisheries Banda, Shamiso 2022-04 computer online resource application/pdf 1 online resource (112 pages) pdf http://hdl.handle.net/10948/55632 https://corycommons.ru.ac.za/vital/access/manager/Repository/vital:53383 English eng Nelson Mandela University Faculty of Science http://hdl.handle.net/10948/55632 vital:53383 https://corycommons.ru.ac.za/vital/access/manager/Repository/vital:53383 Nelson Mandela University All Rights Reserved Open Access Spatial behavior in animals Conservation of natural resources --South Africa Master's theses text 2022 ftrhodesunivcory 2022-12-26T09:31:46Z As top predators, seabirds occupy the upper trophic level of marine ecosystems. They are consequently important for the maintenance of ecosystem structure and function, while also possessing characteristics which are useful for identifying climate-driven changes in oceanography at all trophic levels. This important faunal group is one of the most threatened, with climate change and fisheries bycatch mortality being the primary drivers of population declines. Understanding these threats is important for the management of threatened seabird populations. One impact of climate change and variability in climate occurs through changes in prey availability. As central place foragers, breeding seabirds have trip duration constraints due to the obligation of nest duties. This makes them particularly vulnerable to changes in prey availability within their foraging ranges. The ability to adjust foraging behaviour during environmental conditions which alter prey availability is an important attribute which can contribute to breeding success. Thus, investigating for this foraging behavioural plasticity during different breeding stages provides insights into how a species is likely to be impacted by climate change. The sooty albatross population on Marion Island was studied and displayed a degree of foraging behavioural plasticity during the five-year period of pronounced climatic variability studied. Incubating birds mainly foraged in the subtropical convergence zone (STCZ), the Sub Antarctic Front (SAF) and Subtropical Front (STF) which border it, and the region north of the STF. Brooding birds mainly used the SAF and Polar Frontal Zone (PFZ). Significantly different areas were used between years during both breeding stages. This population showed a lack of consistent habitat preferences which may offer resilience to progressive climatic variability and change. Interactions of sooty albatrosses, as well as white-chinned petrels for comparative purposes, with fisheries were also assessed. The two species were compared to ... Text Antarc* Antarctic Marion Island Rhodes University Cory: Repository Antarctic |
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Spatial behavior in animals Conservation of natural resources --South Africa |
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Spatial behavior in animals Conservation of natural resources --South Africa Banda, Shamiso Foraging behaviour of the Sooty Albatross in relation to climatic variability and fisheries |
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Spatial behavior in animals Conservation of natural resources --South Africa |
description |
As top predators, seabirds occupy the upper trophic level of marine ecosystems. They are consequently important for the maintenance of ecosystem structure and function, while also possessing characteristics which are useful for identifying climate-driven changes in oceanography at all trophic levels. This important faunal group is one of the most threatened, with climate change and fisheries bycatch mortality being the primary drivers of population declines. Understanding these threats is important for the management of threatened seabird populations. One impact of climate change and variability in climate occurs through changes in prey availability. As central place foragers, breeding seabirds have trip duration constraints due to the obligation of nest duties. This makes them particularly vulnerable to changes in prey availability within their foraging ranges. The ability to adjust foraging behaviour during environmental conditions which alter prey availability is an important attribute which can contribute to breeding success. Thus, investigating for this foraging behavioural plasticity during different breeding stages provides insights into how a species is likely to be impacted by climate change. The sooty albatross population on Marion Island was studied and displayed a degree of foraging behavioural plasticity during the five-year period of pronounced climatic variability studied. Incubating birds mainly foraged in the subtropical convergence zone (STCZ), the Sub Antarctic Front (SAF) and Subtropical Front (STF) which border it, and the region north of the STF. Brooding birds mainly used the SAF and Polar Frontal Zone (PFZ). Significantly different areas were used between years during both breeding stages. This population showed a lack of consistent habitat preferences which may offer resilience to progressive climatic variability and change. Interactions of sooty albatrosses, as well as white-chinned petrels for comparative purposes, with fisheries were also assessed. The two species were compared to ... |
format |
Text |
author |
Banda, Shamiso |
author_facet |
Banda, Shamiso |
author_sort |
Banda, Shamiso |
title |
Foraging behaviour of the Sooty Albatross in relation to climatic variability and fisheries |
title_short |
Foraging behaviour of the Sooty Albatross in relation to climatic variability and fisheries |
title_full |
Foraging behaviour of the Sooty Albatross in relation to climatic variability and fisheries |
title_fullStr |
Foraging behaviour of the Sooty Albatross in relation to climatic variability and fisheries |
title_full_unstemmed |
Foraging behaviour of the Sooty Albatross in relation to climatic variability and fisheries |
title_sort |
foraging behaviour of the sooty albatross in relation to climatic variability and fisheries |
publisher |
Nelson Mandela University |
publishDate |
2022 |
url |
http://hdl.handle.net/10948/55632 https://corycommons.ru.ac.za/vital/access/manager/Repository/vital:53383 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Marion Island |
genre_facet |
Antarc* Antarctic Marion Island |
op_relation |
http://hdl.handle.net/10948/55632 vital:53383 https://corycommons.ru.ac.za/vital/access/manager/Repository/vital:53383 |
op_rights |
Nelson Mandela University All Rights Reserved Open Access |
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1766098413358678016 |