Diet composition and food consumption rate of harbor porpoises (Phocoena phocoena ) in the western Baltic Sea
Stomach content composition and prey-specific consumption rates of juvenile and adult harbor porpoises (Phocoena phocoena) were estimated from a data set including 339 stomachs collected over a 32 yr period (1980–2011) in the western Baltic Sea. The stomach contents were mainly hard parts of fish prey...
Published in: | Marine Mammal Science |
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Language: | English |
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2017
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Online Access: | https://orbit.dtu.dk/en/publications/b8b68efa-c8f1-46cb-a208-67ec61d57569 https://doi.org/10.1111/mms.12421 |
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ftdtupubl:oai:pure.atira.dk:publications/b8b68efa-c8f1-46cb-a208-67ec61d57569 2024-09-15T17:55:31+00:00 Diet composition and food consumption rate of harbor porpoises (Phocoena phocoena ) in the western Baltic Sea Andreasen, Heidi Ross, Stine Dalmann Siebert, Ursula Andersen, Niels Gerner Ronnenberg, Katrin Gilles, Anita 2017 https://orbit.dtu.dk/en/publications/b8b68efa-c8f1-46cb-a208-67ec61d57569 https://doi.org/10.1111/mms.12421 eng eng https://orbit.dtu.dk/en/publications/b8b68efa-c8f1-46cb-a208-67ec61d57569 info:eu-repo/semantics/closedAccess Andreasen , H , Ross , S D , Siebert , U , Andersen , N G , Ronnenberg , K & Gilles , A 2017 , ' Diet composition and food consumption rate of harbor porpoises (Phocoena phocoena ) in the western Baltic Sea ' , Marine Mammal Science , vol. 33 , no. 4 , pp. 1053-1079 . https://doi.org/10.1111/mms.12421 article 2017 ftdtupubl https://doi.org/10.1111/mms.12421 2024-08-05T23:48:29Z Stomach content composition and prey-specific consumption rates of juvenile and adult harbor porpoises (Phocoena phocoena) were estimated from a data set including 339 stomachs collected over a 32 yr period (1980–2011) in the western Baltic Sea. The stomach contents were mainly hard parts of fish prey and in particular otoliths. The bias originating from differential residence time of otoliths in the stomachs was addressed by use of a recently developed approach. Atlantic cod and herring were the main prey of adults, constituting on average 70% of the diet mass. Juvenile porpoises also frequently consumed gobies. Here, the mass contribution by gobies was on aver-age 25%, which was as much as cod. Other species such as whiting, sprat, eelpout, and sandeels were of minor importance for both juveniles and adults. The diet compo- sition differed between years, quarters, and porpoise acquisition method. Yearly consumption rates for porpoises in the western Baltic Sea were obtained in three scenarios on the daily energy requirements of a porpoise in combination with an estimate including the 95% CLs of the porpoise population size. Cod of age groups 1 and 2 and intermediate-sized herring suffered the highest predation from porpoises Article in Journal/Newspaper atlantic cod Phocoena phocoena Technical University of Denmark: DTU Orbit Marine Mammal Science 33 4 1053 1079 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
description |
Stomach content composition and prey-specific consumption rates of juvenile and adult harbor porpoises (Phocoena phocoena) were estimated from a data set including 339 stomachs collected over a 32 yr period (1980–2011) in the western Baltic Sea. The stomach contents were mainly hard parts of fish prey and in particular otoliths. The bias originating from differential residence time of otoliths in the stomachs was addressed by use of a recently developed approach. Atlantic cod and herring were the main prey of adults, constituting on average 70% of the diet mass. Juvenile porpoises also frequently consumed gobies. Here, the mass contribution by gobies was on aver-age 25%, which was as much as cod. Other species such as whiting, sprat, eelpout, and sandeels were of minor importance for both juveniles and adults. The diet compo- sition differed between years, quarters, and porpoise acquisition method. Yearly consumption rates for porpoises in the western Baltic Sea were obtained in three scenarios on the daily energy requirements of a porpoise in combination with an estimate including the 95% CLs of the porpoise population size. Cod of age groups 1 and 2 and intermediate-sized herring suffered the highest predation from porpoises |
format |
Article in Journal/Newspaper |
author |
Andreasen, Heidi Ross, Stine Dalmann Siebert, Ursula Andersen, Niels Gerner Ronnenberg, Katrin Gilles, Anita |
spellingShingle |
Andreasen, Heidi Ross, Stine Dalmann Siebert, Ursula Andersen, Niels Gerner Ronnenberg, Katrin Gilles, Anita Diet composition and food consumption rate of harbor porpoises (Phocoena phocoena ) in the western Baltic Sea |
author_facet |
Andreasen, Heidi Ross, Stine Dalmann Siebert, Ursula Andersen, Niels Gerner Ronnenberg, Katrin Gilles, Anita |
author_sort |
Andreasen, Heidi |
title |
Diet composition and food consumption rate of harbor porpoises (Phocoena phocoena ) in the western Baltic Sea |
title_short |
Diet composition and food consumption rate of harbor porpoises (Phocoena phocoena ) in the western Baltic Sea |
title_full |
Diet composition and food consumption rate of harbor porpoises (Phocoena phocoena ) in the western Baltic Sea |
title_fullStr |
Diet composition and food consumption rate of harbor porpoises (Phocoena phocoena ) in the western Baltic Sea |
title_full_unstemmed |
Diet composition and food consumption rate of harbor porpoises (Phocoena phocoena ) in the western Baltic Sea |
title_sort |
diet composition and food consumption rate of harbor porpoises (phocoena phocoena ) in the western baltic sea |
publishDate |
2017 |
url |
https://orbit.dtu.dk/en/publications/b8b68efa-c8f1-46cb-a208-67ec61d57569 https://doi.org/10.1111/mms.12421 |
genre |
atlantic cod Phocoena phocoena |
genre_facet |
atlantic cod Phocoena phocoena |
op_source |
Andreasen , H , Ross , S D , Siebert , U , Andersen , N G , Ronnenberg , K & Gilles , A 2017 , ' Diet composition and food consumption rate of harbor porpoises (Phocoena phocoena ) in the western Baltic Sea ' , Marine Mammal Science , vol. 33 , no. 4 , pp. 1053-1079 . https://doi.org/10.1111/mms.12421 |
op_relation |
https://orbit.dtu.dk/en/publications/b8b68efa-c8f1-46cb-a208-67ec61d57569 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1111/mms.12421 |
container_title |
Marine Mammal Science |
container_volume |
33 |
container_issue |
4 |
container_start_page |
1053 |
op_container_end_page |
1079 |
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1810431790555332608 |