Diet of harbor porpoises along the Dutch coast: a combined stable isotope and stomach contents approach
peer reviewed High stranding frequency of porpoises, Phocoena phocoena, along the Dutch coast since 2006 has led to increased interest in the ecology of porpoises in the North Sea. Stranded porpoises were collected along the Dutch coast (2006–2008) and their diet was assessed through stomach content...
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Blackwell Publishing
2013
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Online Access: | https://orbi.uliege.be/handle/2268/134572 https://orbi.uliege.be/bitstream/2268/134572/1/2013%20Jansen%20MMS%2029-%20E295.pdf https://doi.org/10.1111/j.1748-7692.2012.00621.x |
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ftorbi:oai:orbi.ulg.ac.be:2268/134572 2024-10-13T14:07:52+00:00 Diet of harbor porpoises along the Dutch coast: a combined stable isotope and stomach contents approach Jansen, Okka Michel, Loïc Lepoint, Gilles Das, Krishna Couperus, A.S. Reijnders, Peter 2013 https://orbi.uliege.be/handle/2268/134572 https://orbi.uliege.be/bitstream/2268/134572/1/2013%20Jansen%20MMS%2029-%20E295.pdf https://doi.org/10.1111/j.1748-7692.2012.00621.x en eng Blackwell Publishing urn:issn:0824-0469 https://orbi.uliege.be/handle/2268/134572 info:hdl:2268/134572 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess Marine Mammal Science, 29 (3), E295-E311 (2013) harbour porpoise stable isotopes Phocoena phocoena marine mammals SIAR mixing models Life sciences Aquatic sciences & oceanology Sciences du vivant Sciences aquatiques & océanologie journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2013 ftorbi https://doi.org/10.1111/j.1748-7692.2012.00621.x 2024-09-27T07:01:44Z peer reviewed High stranding frequency of porpoises, Phocoena phocoena, along the Dutch coast since 2006 has led to increased interest in the ecology of porpoises in the North Sea. Stranded porpoises were collected along the Dutch coast (2006–2008) and their diet was assessed through stomach content and stable isotope analysis (d13C and d15N) of porpoise muscle and prey. Stable isotope analysis (SIAR) was used to estimate the con- tribution of prey species to the porpoises’ diet. This was compared to prey composi- tion from stomach contents, to analyze differences between long- and short-term diet. According to stomach contents, 90.5% of the diet consisted of gobies, whiting, lesser sandeel, herring, cod, and sprat. Stable isotope analysis revealed that 70-83% of the diet consisted of poor cod, mackerel, greater sandeel, lesser sandeel, sprat, and gobies, highlighting a higher importance of pelagic, schooling species in the porpoises’ diet compared to stomach contents. This could be due to prey distribution as well as differ- ences in behavior of porpoises and prey between the coastal zone and offshore waters. This study supports the need for multi-method approaches. Future ecological and fishery impact assessment studies and management decisions for porpoise conservation should acknowledge this difference between the long- and short-term diet. Article in Journal/Newspaper Harbour porpoise Phocoena phocoena University of Liège: ORBi (Open Repository and Bibliography) Marine Mammal Science 29 3 E295 E311 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
harbour porpoise stable isotopes Phocoena phocoena marine mammals SIAR mixing models Life sciences Aquatic sciences & oceanology Sciences du vivant Sciences aquatiques & océanologie |
spellingShingle |
harbour porpoise stable isotopes Phocoena phocoena marine mammals SIAR mixing models Life sciences Aquatic sciences & oceanology Sciences du vivant Sciences aquatiques & océanologie Jansen, Okka Michel, Loïc Lepoint, Gilles Das, Krishna Couperus, A.S. Reijnders, Peter Diet of harbor porpoises along the Dutch coast: a combined stable isotope and stomach contents approach |
topic_facet |
harbour porpoise stable isotopes Phocoena phocoena marine mammals SIAR mixing models Life sciences Aquatic sciences & oceanology Sciences du vivant Sciences aquatiques & océanologie |
description |
peer reviewed High stranding frequency of porpoises, Phocoena phocoena, along the Dutch coast since 2006 has led to increased interest in the ecology of porpoises in the North Sea. Stranded porpoises were collected along the Dutch coast (2006–2008) and their diet was assessed through stomach content and stable isotope analysis (d13C and d15N) of porpoise muscle and prey. Stable isotope analysis (SIAR) was used to estimate the con- tribution of prey species to the porpoises’ diet. This was compared to prey composi- tion from stomach contents, to analyze differences between long- and short-term diet. According to stomach contents, 90.5% of the diet consisted of gobies, whiting, lesser sandeel, herring, cod, and sprat. Stable isotope analysis revealed that 70-83% of the diet consisted of poor cod, mackerel, greater sandeel, lesser sandeel, sprat, and gobies, highlighting a higher importance of pelagic, schooling species in the porpoises’ diet compared to stomach contents. This could be due to prey distribution as well as differ- ences in behavior of porpoises and prey between the coastal zone and offshore waters. This study supports the need for multi-method approaches. Future ecological and fishery impact assessment studies and management decisions for porpoise conservation should acknowledge this difference between the long- and short-term diet. |
format |
Article in Journal/Newspaper |
author |
Jansen, Okka Michel, Loïc Lepoint, Gilles Das, Krishna Couperus, A.S. Reijnders, Peter |
author_facet |
Jansen, Okka Michel, Loïc Lepoint, Gilles Das, Krishna Couperus, A.S. Reijnders, Peter |
author_sort |
Jansen, Okka |
title |
Diet of harbor porpoises along the Dutch coast: a combined stable isotope and stomach contents approach |
title_short |
Diet of harbor porpoises along the Dutch coast: a combined stable isotope and stomach contents approach |
title_full |
Diet of harbor porpoises along the Dutch coast: a combined stable isotope and stomach contents approach |
title_fullStr |
Diet of harbor porpoises along the Dutch coast: a combined stable isotope and stomach contents approach |
title_full_unstemmed |
Diet of harbor porpoises along the Dutch coast: a combined stable isotope and stomach contents approach |
title_sort |
diet of harbor porpoises along the dutch coast: a combined stable isotope and stomach contents approach |
publisher |
Blackwell Publishing |
publishDate |
2013 |
url |
https://orbi.uliege.be/handle/2268/134572 https://orbi.uliege.be/bitstream/2268/134572/1/2013%20Jansen%20MMS%2029-%20E295.pdf https://doi.org/10.1111/j.1748-7692.2012.00621.x |
genre |
Harbour porpoise Phocoena phocoena |
genre_facet |
Harbour porpoise Phocoena phocoena |
op_source |
Marine Mammal Science, 29 (3), E295-E311 (2013) |
op_relation |
urn:issn:0824-0469 https://orbi.uliege.be/handle/2268/134572 info:hdl:2268/134572 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1111/j.1748-7692.2012.00621.x |
container_title |
Marine Mammal Science |
container_volume |
29 |
container_issue |
3 |
container_start_page |
E295 |
op_container_end_page |
E311 |
_version_ |
1812814416292347904 |