Diet composition and food consumption rate of harbor porpoises ( Phocoena phocoena) in the western Baltic Sea
Abstract 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...
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crwiley:10.1111/mms.12421 2024-06-23T07:51:05+00:00 Diet composition and food consumption rate of harbor porpoises ( Phocoena phocoena) in the western Baltic Sea Andreasen, Heidi Ross, Stine D. Siebert, Ursula Andersen, Niels G. Ronnenberg, Katrin Gilles, Anita Strategiske Forskningsråd 2017 http://dx.doi.org/10.1111/mms.12421 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmms.12421 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mms.12421 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Marine Mammal Science volume 33, issue 4, page 1053-1079 ISSN 0824-0469 1748-7692 journal-article 2017 crwiley https://doi.org/10.1111/mms.12421 2024-06-11T04:45:30Z Abstract 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 average 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 composition 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% CL s 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 Wiley Online Library Marine Mammal Science 33 4 1053 1079 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract 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 average 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 composition 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% CL s of the porpoise population size. Cod of age groups 1 and 2 and intermediate‐sized herring suffered the highest predation from porpoises. |
author2 |
Strategiske Forskningsråd |
format |
Article in Journal/Newspaper |
author |
Andreasen, Heidi Ross, Stine D. Siebert, Ursula Andersen, Niels G. Ronnenberg, Katrin Gilles, Anita |
spellingShingle |
Andreasen, Heidi Ross, Stine D. Siebert, Ursula Andersen, Niels G. 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 D. Siebert, Ursula Andersen, Niels G. 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 |
publisher |
Wiley |
publishDate |
2017 |
url |
http://dx.doi.org/10.1111/mms.12421 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmms.12421 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mms.12421 |
genre |
atlantic cod Phocoena phocoena |
genre_facet |
atlantic cod Phocoena phocoena |
op_source |
Marine Mammal Science volume 33, issue 4, page 1053-1079 ISSN 0824-0469 1748-7692 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
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 |
_version_ |
1802642082823667712 |