Prey-field use by top predators of the Southern Ocean: understanding foraging dynamics of macaroni penguin (Eudyptes chrysolophus) near Heard Island ...
This study used data collected during the 2003/04 Heard Island Predator Prey Investigation and Ecosystem Study (HIPPIES project). It is the first study to directly compare diet, foraging, and prey-field dynamics with energetics of macaroni penguins (Eudyptes chrysolophus) around Heard Island. Diet a...
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University Of Tasmania
2023
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Online Access: | https://dx.doi.org/10.25959/23241245 https://figshare.utas.edu.au/articles/thesis/Prey-field_use_by_top_predators_of_the_Southern_Ocean_understanding_foraging_dynamics_of_macaroni_penguin_Eudyptes_chrysolophus_near_Heard_Island/23241245 |
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ftdatacite:10.25959/23241245 2023-06-11T04:11:30+02:00 Prey-field use by top predators of the Southern Ocean: understanding foraging dynamics of macaroni penguin (Eudyptes chrysolophus) near Heard Island ... Bedford, M 2023 https://dx.doi.org/10.25959/23241245 https://figshare.utas.edu.au/articles/thesis/Prey-field_use_by_top_predators_of_the_Southern_Ocean_understanding_foraging_dynamics_of_macaroni_penguin_Eudyptes_chrysolophus_near_Heard_Island/23241245 unknown University Of Tasmania In Copyright http://rightsstatements.org/vocab/InC/1.0/ article-journal Text ScholarlyArticle Thesis 2023 ftdatacite https://doi.org/10.25959/23241245 2023-06-01T12:13:12Z This study used data collected during the 2003/04 Heard Island Predator Prey Investigation and Ecosystem Study (HIPPIES project). It is the first study to directly compare diet, foraging, and prey-field dynamics with energetics of macaroni penguins (Eudyptes chrysolophus) around Heard Island. Diet and foraging dynamics were evaluated for the guard and crèche stages of breeding macaroni penguins from Heard Island. Diet changed significantly between the two stages (p < 0.005), from a diet dominated by krill (83%) in the guard stage, to a more variable diet in the crèche stage (43% krill, 33% fish, 23% amphipods). The observed change in diet corresponded with a change in foraging behaviour. During the guard stage foraging trips were short (mean = 109.1 km ± se 7.2 km), but became significantly (p < 0.005) longer (mean = 660 km ± 139.2 km) in the crèche stage. These changes lead to interesting questions regarding the relationship between diet, foraging and prey-field dynamics. The ... Thesis Eudyptes chrysolophus Heard Island Macaroni penguin Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Heard Island Southern Ocean |
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DataCite Metadata Store (German National Library of Science and Technology) |
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description |
This study used data collected during the 2003/04 Heard Island Predator Prey Investigation and Ecosystem Study (HIPPIES project). It is the first study to directly compare diet, foraging, and prey-field dynamics with energetics of macaroni penguins (Eudyptes chrysolophus) around Heard Island. Diet and foraging dynamics were evaluated for the guard and crèche stages of breeding macaroni penguins from Heard Island. Diet changed significantly between the two stages (p < 0.005), from a diet dominated by krill (83%) in the guard stage, to a more variable diet in the crèche stage (43% krill, 33% fish, 23% amphipods). The observed change in diet corresponded with a change in foraging behaviour. During the guard stage foraging trips were short (mean = 109.1 km ± se 7.2 km), but became significantly (p < 0.005) longer (mean = 660 km ± 139.2 km) in the crèche stage. These changes lead to interesting questions regarding the relationship between diet, foraging and prey-field dynamics. The ... |
format |
Thesis |
author |
Bedford, M |
spellingShingle |
Bedford, M Prey-field use by top predators of the Southern Ocean: understanding foraging dynamics of macaroni penguin (Eudyptes chrysolophus) near Heard Island ... |
author_facet |
Bedford, M |
author_sort |
Bedford, M |
title |
Prey-field use by top predators of the Southern Ocean: understanding foraging dynamics of macaroni penguin (Eudyptes chrysolophus) near Heard Island ... |
title_short |
Prey-field use by top predators of the Southern Ocean: understanding foraging dynamics of macaroni penguin (Eudyptes chrysolophus) near Heard Island ... |
title_full |
Prey-field use by top predators of the Southern Ocean: understanding foraging dynamics of macaroni penguin (Eudyptes chrysolophus) near Heard Island ... |
title_fullStr |
Prey-field use by top predators of the Southern Ocean: understanding foraging dynamics of macaroni penguin (Eudyptes chrysolophus) near Heard Island ... |
title_full_unstemmed |
Prey-field use by top predators of the Southern Ocean: understanding foraging dynamics of macaroni penguin (Eudyptes chrysolophus) near Heard Island ... |
title_sort |
prey-field use by top predators of the southern ocean: understanding foraging dynamics of macaroni penguin (eudyptes chrysolophus) near heard island ... |
publisher |
University Of Tasmania |
publishDate |
2023 |
url |
https://dx.doi.org/10.25959/23241245 https://figshare.utas.edu.au/articles/thesis/Prey-field_use_by_top_predators_of_the_Southern_Ocean_understanding_foraging_dynamics_of_macaroni_penguin_Eudyptes_chrysolophus_near_Heard_Island/23241245 |
geographic |
Heard Island Southern Ocean |
geographic_facet |
Heard Island Southern Ocean |
genre |
Eudyptes chrysolophus Heard Island Macaroni penguin Southern Ocean |
genre_facet |
Eudyptes chrysolophus Heard Island Macaroni penguin Southern Ocean |
op_rights |
In Copyright http://rightsstatements.org/vocab/InC/1.0/ |
op_doi |
https://doi.org/10.25959/23241245 |
_version_ |
1768386626263711744 |