Marine mammals from the North Sea: Approach of their feeding ecology through stable isotope and cadmium measurements
The fertile waters of the North Sea represent one major life site for at least three different marine mammal species: the harbour porpoise, Phocoena phocoena , the harbour seal, Phoca vitulina, and the white-beaked dolphin, Lagenorhynchus albirostris. More occasionally, oceanic species such as the w...
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ftorbi:oai:orbi.ulg.ac.be:2268/65892 2024-04-21T07:57:53+00:00 Marine mammals from the North Sea: Approach of their feeding ecology through stable isotope and cadmium measurements Das, Krishna Lepoint, Gilles Debacker, Virginie Bouquegneau, Jean-Marie MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège 2000 https://orbi.uliege.be/handle/2268/65892 en eng https://orbi.uliege.be/handle/2268/65892 info:hdl:2268/65892 Réunion des Océanographes français: Zones Littorales et Anthropisation: Gestion et nuisances, La Rochelle, France [FR], 4-6 juillet 2000 marine mammals cadmium stable isotopes Life sciences Environmental sciences & ecology Aquatic sciences & oceanology Sciences du vivant Sciences de l’environnement & écologie Sciences aquatiques & océanologie conference poster not in proceedings http://purl.org/coar/resource_type/c_18co info:eu-repo/semantics/conferencePoster 2000 ftorbi 2024-03-27T14:43:11Z The fertile waters of the North Sea represent one major life site for at least three different marine mammal species: the harbour porpoise, Phocoena phocoena , the harbour seal, Phoca vitulina, and the white-beaked dolphin, Lagenorhynchus albirostris. More occasionally, oceanic species such as the white-sided dolphin Lagenorhynchus acutus, the sperm whale Physeter macrocephalus or the fin whale Balaenoptera physalus can be sighted or found stranded. Very few data dealing with marine mammal diet in the North Sea are available. In order to contribute to the feeding ecology of these North Sea marine mammals, Cd as well as 15N and 13C measurements have been performed in their tissues. Sperm whales and white-sided dolphins display high renal Cd levels (258 µg.g-1 and 88 µg.g-1 dry weight respectively). Mean Cd concentrations measured in harbour porpoise, harbour seal, white beaked dolphin and fin whale kidneys remain low (mean: 5, 0.9, 0.5 and 4 µg.g-1 respectively). However, some adult porpoises display renal Cd concentrations higher than 10 µg.g-1. Mean 13C measured in the muscles of sperm whales, fin whales and white-sided dolphins are more negative compared to harbour porpoise, harbour seal or white-beaked dolphin mean value. Cd contaminated porpoises display significant lower muscle 13C than other porpoises. Both low d13C and high Cd levels suggest a greater reliance of white-sided dolphins, sperm whales on oceanic cephalopods. It appears that some harbour porpoises can also feed on oceanic squids suggesting dynamic interactions between the North Sea and the North Atlantic porpoise populations. Conference Object Balaenoptera physalus Fin whale Harbour porpoise harbour seal Lagenorhynchus albirostris North Atlantic Phoca vitulina Phocoena phocoena Physeter macrocephalus Sperm whale White-beaked dolphin University of Liège: ORBi (Open Repository and Bibliography) |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
marine mammals cadmium stable isotopes Life sciences Environmental sciences & ecology Aquatic sciences & oceanology Sciences du vivant Sciences de l’environnement & écologie Sciences aquatiques & océanologie |
spellingShingle |
marine mammals cadmium stable isotopes Life sciences Environmental sciences & ecology Aquatic sciences & oceanology Sciences du vivant Sciences de l’environnement & écologie Sciences aquatiques & océanologie Das, Krishna Lepoint, Gilles Debacker, Virginie Bouquegneau, Jean-Marie Marine mammals from the North Sea: Approach of their feeding ecology through stable isotope and cadmium measurements |
topic_facet |
marine mammals cadmium stable isotopes Life sciences Environmental sciences & ecology Aquatic sciences & oceanology Sciences du vivant Sciences de l’environnement & écologie Sciences aquatiques & océanologie |
description |
The fertile waters of the North Sea represent one major life site for at least three different marine mammal species: the harbour porpoise, Phocoena phocoena , the harbour seal, Phoca vitulina, and the white-beaked dolphin, Lagenorhynchus albirostris. More occasionally, oceanic species such as the white-sided dolphin Lagenorhynchus acutus, the sperm whale Physeter macrocephalus or the fin whale Balaenoptera physalus can be sighted or found stranded. Very few data dealing with marine mammal diet in the North Sea are available. In order to contribute to the feeding ecology of these North Sea marine mammals, Cd as well as 15N and 13C measurements have been performed in their tissues. Sperm whales and white-sided dolphins display high renal Cd levels (258 µg.g-1 and 88 µg.g-1 dry weight respectively). Mean Cd concentrations measured in harbour porpoise, harbour seal, white beaked dolphin and fin whale kidneys remain low (mean: 5, 0.9, 0.5 and 4 µg.g-1 respectively). However, some adult porpoises display renal Cd concentrations higher than 10 µg.g-1. Mean 13C measured in the muscles of sperm whales, fin whales and white-sided dolphins are more negative compared to harbour porpoise, harbour seal or white-beaked dolphin mean value. Cd contaminated porpoises display significant lower muscle 13C than other porpoises. Both low d13C and high Cd levels suggest a greater reliance of white-sided dolphins, sperm whales on oceanic cephalopods. It appears that some harbour porpoises can also feed on oceanic squids suggesting dynamic interactions between the North Sea and the North Atlantic porpoise populations. |
author2 |
MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège |
format |
Conference Object |
author |
Das, Krishna Lepoint, Gilles Debacker, Virginie Bouquegneau, Jean-Marie |
author_facet |
Das, Krishna Lepoint, Gilles Debacker, Virginie Bouquegneau, Jean-Marie |
author_sort |
Das, Krishna |
title |
Marine mammals from the North Sea: Approach of their feeding ecology through stable isotope and cadmium measurements |
title_short |
Marine mammals from the North Sea: Approach of their feeding ecology through stable isotope and cadmium measurements |
title_full |
Marine mammals from the North Sea: Approach of their feeding ecology through stable isotope and cadmium measurements |
title_fullStr |
Marine mammals from the North Sea: Approach of their feeding ecology through stable isotope and cadmium measurements |
title_full_unstemmed |
Marine mammals from the North Sea: Approach of their feeding ecology through stable isotope and cadmium measurements |
title_sort |
marine mammals from the north sea: approach of their feeding ecology through stable isotope and cadmium measurements |
publishDate |
2000 |
url |
https://orbi.uliege.be/handle/2268/65892 |
genre |
Balaenoptera physalus Fin whale Harbour porpoise harbour seal Lagenorhynchus albirostris North Atlantic Phoca vitulina Phocoena phocoena Physeter macrocephalus Sperm whale White-beaked dolphin |
genre_facet |
Balaenoptera physalus Fin whale Harbour porpoise harbour seal Lagenorhynchus albirostris North Atlantic Phoca vitulina Phocoena phocoena Physeter macrocephalus Sperm whale White-beaked dolphin |
op_source |
Réunion des Océanographes français: Zones Littorales et Anthropisation: Gestion et nuisances, La Rochelle, France [FR], 4-6 juillet 2000 |
op_relation |
https://orbi.uliege.be/handle/2268/65892 info:hdl:2268/65892 |
_version_ |
1796939316343078912 |