Feeding ecology of harbour porpoises: stable isotope analysis of carbon and nitrogen in muscle and bone
peer reviewed Harbour porpoises are the most common small cetaceans in the North Sea and Dutch coastal waters. To study their trophic level and feeding location, stable carbon and nitrogen isotope ratios (d13C and d15N) were analysed in muscle and bone samples collected from 157 porpoises stranded a...
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Taylor & Francis Ltd
2012
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Online Access: | https://orbi.uliege.be/handle/2268/129191 https://orbi.uliege.be/bitstream/2268/129191/1/2012%20Jansen%20.pdf https://doi.org/10.1080/17451000.2012.692164 |
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ftorbi:oai:orbi.ulg.ac.be:2268/129191 2023-05-15T16:33:27+02:00 Feeding ecology of harbour porpoises: stable isotope analysis of carbon and nitrogen in muscle and bone Jansen, Okka Geert, Aarts Das, Krishna Lepoint, Gilles Michel, Loïc Reijnders, Peter MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège 2012 https://orbi.uliege.be/handle/2268/129191 https://orbi.uliege.be/bitstream/2268/129191/1/2012%20Jansen%20.pdf https://doi.org/10.1080/17451000.2012.692164 en eng Taylor & Francis Ltd urn:issn:1745-1000 urn:issn:1745-1019 https://orbi.uliege.be/handle/2268/129191 info:hdl:2268/129191 https://orbi.uliege.be/bitstream/2268/129191/1/2012%20Jansen%20.pdf doi:10.1080/17451000.2012.692164 scopus-id:2-s2.0-84865216900 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess Marine Biology Research, 8 (9), 829-841 (2012) harbour porpoise Phocoena phocoena marine mammals stable isotopes diet 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 2012 ftorbi https://doi.org/10.1080/17451000.2012.692164 2022-12-12T22:06:52Z peer reviewed Harbour porpoises are the most common small cetaceans in the North Sea and Dutch coastal waters. To study their trophic level and feeding location, stable carbon and nitrogen isotope ratios (d13C and d15N) were analysed in muscle and bone samples collected from 157 porpoises stranded along the Dutch coast (2006????2008). In addition, samples from 30 prey species were analysed. Prey samples showed high d15N values in species of higher trophic level. In addition, geographic differences in isotopic composition were found, with higher d15N and d13C values in prey from more southern, coastal and estuarine areas. Based on muscle d15N values, we found neonatal enrichment and that larger porpoises, in particular males, seem to feed on lower trophic level species, compared to smaller individuals. Also bone d15N values show that larger animals had fed on lower trophic levels in distant times. Porpoises from the Eastern Scheldt reveal distinct d13C values in muscle, but not in bone. This shows that these animals had foraged in the Eastern Scheldt for a longer time period but were not born there. Seasonal variation in bone d15N and d13C values revealed two distinct groups of porpoises along the Dutch coast, a winter group (mainly males) that migrated from neighbouring regions and a Dutch subpopulation in summer. These results furthered our insight about shifts in trophic level and feeding location of harbour porpoises from the southern North Sea over time. Article in Journal/Newspaper Harbour porpoise Phocoena phocoena University of Liège: ORBi (Open Repository and Bibliography) Marine Biology Research 8 9 829 841 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
harbour porpoise Phocoena phocoena marine mammals stable isotopes diet Life sciences Aquatic sciences & oceanology Sciences du vivant Sciences aquatiques & océanologie |
spellingShingle |
harbour porpoise Phocoena phocoena marine mammals stable isotopes diet Life sciences Aquatic sciences & oceanology Sciences du vivant Sciences aquatiques & océanologie Jansen, Okka Geert, Aarts Das, Krishna Lepoint, Gilles Michel, Loïc Reijnders, Peter Feeding ecology of harbour porpoises: stable isotope analysis of carbon and nitrogen in muscle and bone |
topic_facet |
harbour porpoise Phocoena phocoena marine mammals stable isotopes diet Life sciences Aquatic sciences & oceanology Sciences du vivant Sciences aquatiques & océanologie |
description |
peer reviewed Harbour porpoises are the most common small cetaceans in the North Sea and Dutch coastal waters. To study their trophic level and feeding location, stable carbon and nitrogen isotope ratios (d13C and d15N) were analysed in muscle and bone samples collected from 157 porpoises stranded along the Dutch coast (2006????2008). In addition, samples from 30 prey species were analysed. Prey samples showed high d15N values in species of higher trophic level. In addition, geographic differences in isotopic composition were found, with higher d15N and d13C values in prey from more southern, coastal and estuarine areas. Based on muscle d15N values, we found neonatal enrichment and that larger porpoises, in particular males, seem to feed on lower trophic level species, compared to smaller individuals. Also bone d15N values show that larger animals had fed on lower trophic levels in distant times. Porpoises from the Eastern Scheldt reveal distinct d13C values in muscle, but not in bone. This shows that these animals had foraged in the Eastern Scheldt for a longer time period but were not born there. Seasonal variation in bone d15N and d13C values revealed two distinct groups of porpoises along the Dutch coast, a winter group (mainly males) that migrated from neighbouring regions and a Dutch subpopulation in summer. These results furthered our insight about shifts in trophic level and feeding location of harbour porpoises from the southern North Sea over time. |
author2 |
MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège |
format |
Article in Journal/Newspaper |
author |
Jansen, Okka Geert, Aarts Das, Krishna Lepoint, Gilles Michel, Loïc Reijnders, Peter |
author_facet |
Jansen, Okka Geert, Aarts Das, Krishna Lepoint, Gilles Michel, Loïc Reijnders, Peter |
author_sort |
Jansen, Okka |
title |
Feeding ecology of harbour porpoises: stable isotope analysis of carbon and nitrogen in muscle and bone |
title_short |
Feeding ecology of harbour porpoises: stable isotope analysis of carbon and nitrogen in muscle and bone |
title_full |
Feeding ecology of harbour porpoises: stable isotope analysis of carbon and nitrogen in muscle and bone |
title_fullStr |
Feeding ecology of harbour porpoises: stable isotope analysis of carbon and nitrogen in muscle and bone |
title_full_unstemmed |
Feeding ecology of harbour porpoises: stable isotope analysis of carbon and nitrogen in muscle and bone |
title_sort |
feeding ecology of harbour porpoises: stable isotope analysis of carbon and nitrogen in muscle and bone |
publisher |
Taylor & Francis Ltd |
publishDate |
2012 |
url |
https://orbi.uliege.be/handle/2268/129191 https://orbi.uliege.be/bitstream/2268/129191/1/2012%20Jansen%20.pdf https://doi.org/10.1080/17451000.2012.692164 |
genre |
Harbour porpoise Phocoena phocoena |
genre_facet |
Harbour porpoise Phocoena phocoena |
op_source |
Marine Biology Research, 8 (9), 829-841 (2012) |
op_relation |
urn:issn:1745-1000 urn:issn:1745-1019 https://orbi.uliege.be/handle/2268/129191 info:hdl:2268/129191 https://orbi.uliege.be/bitstream/2268/129191/1/2012%20Jansen%20.pdf doi:10.1080/17451000.2012.692164 scopus-id:2-s2.0-84865216900 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1080/17451000.2012.692164 |
container_title |
Marine Biology Research |
container_volume |
8 |
container_issue |
9 |
container_start_page |
829 |
op_container_end_page |
841 |
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1766023141756239872 |