Trophic position and cadmium content of dolphins and tunas from the Northeast Atlantic
Associations of tunas and dolphins in the wild are quite frequent events and the question arises how predators requiring similar diet in the same habitat share their environmental resources. As isotopic composition of an animal is related to that of its preys, stable isotopes (13C/12C and 15N/14N) a...
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ftorbi:oai:orbi.ulg.ac.be:2268/35468 2024-04-21T08:08:25+00:00 Trophic position and cadmium content of dolphins and tunas from the Northeast Atlantic Das, Krishna Bouquegneau, Jean-Marie MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège 1999 https://orbi.uliege.be/handle/2268/35468 en eng https://orbi.uliege.be/handle/2268/35468 info:hdl:2268/35468 restricted access http://purl.org/coar/access_right/c_16ec info:eu-repo/semantics/restrictedAccess European Research on Cetaceans - 13. Proceedings of the Thirteenth Annual Conference of the European Cetacean Society 5-8 April 1999., 403-405 (1999); Thirteenth Annual Conference of the European Cetacean Society, Valencia, Spain [ES], 5-8 avril 1999 marine mammals trace elements Atlantic Life sciences Environmental sciences & ecology Aquatic sciences & oceanology Sciences du vivant Sciences de l’environnement & écologie Sciences aquatiques & océanologie conference paper http://purl.org/coar/resource_type/c_5794 info:eu-repo/semantics/conferenceObject 1999 ftorbi 2024-03-27T14:42:52Z Associations of tunas and dolphins in the wild are quite frequent events and the question arises how predators requiring similar diet in the same habitat share their environmental resources. As isotopic composition of an animal is related to that of its preys, stable isotopes (13C/12C and 15N/14N) analyses were performed in three predator species from the Northeast Atlantic: the striped dolphin, Stenella coeruleoalba, the common dolphin Delphinus delphis, and the albacore tuna, Thunnus alalunga, and compared to their previously described stomach content. Heavy metals (Cd, Zn, Cu and Fe) are mainly transferred through the diet and so, have been determined in the tissues of the animals. Albacore tunas muscles display higher 15N than in common and striped dolphins (mean: 11.4 0/00 vs. 10.3 0/00 and 10.4 0/00, respectively) which reflects its higher trophic level. Higher 13C are found in common (-18.4 0/00) and striped dolphin (-18.10/00) muscles than in albacore tuna (-19.3 0/00). Differences also appear in heavy metal contents, especially cadmium in muscles, lower in albacore tuna than in dolphins (0.37 and 0.1 ppm DW for striped and common dolphins vs.<0.07 ppm DW for albacore tuna) which probably reflects in dolphins a cadmium contamination through squid assimilation. These results suggest that, despite a close hunting association, the trophic position of these three predators is quite well distinct. Conference Object Northeast Atlantic 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 trace elements Atlantic Life sciences Environmental sciences & ecology Aquatic sciences & oceanology Sciences du vivant Sciences de l’environnement & écologie Sciences aquatiques & océanologie |
spellingShingle |
marine mammals trace elements Atlantic Life sciences Environmental sciences & ecology Aquatic sciences & oceanology Sciences du vivant Sciences de l’environnement & écologie Sciences aquatiques & océanologie Das, Krishna Bouquegneau, Jean-Marie Trophic position and cadmium content of dolphins and tunas from the Northeast Atlantic |
topic_facet |
marine mammals trace elements Atlantic Life sciences Environmental sciences & ecology Aquatic sciences & oceanology Sciences du vivant Sciences de l’environnement & écologie Sciences aquatiques & océanologie |
description |
Associations of tunas and dolphins in the wild are quite frequent events and the question arises how predators requiring similar diet in the same habitat share their environmental resources. As isotopic composition of an animal is related to that of its preys, stable isotopes (13C/12C and 15N/14N) analyses were performed in three predator species from the Northeast Atlantic: the striped dolphin, Stenella coeruleoalba, the common dolphin Delphinus delphis, and the albacore tuna, Thunnus alalunga, and compared to their previously described stomach content. Heavy metals (Cd, Zn, Cu and Fe) are mainly transferred through the diet and so, have been determined in the tissues of the animals. Albacore tunas muscles display higher 15N than in common and striped dolphins (mean: 11.4 0/00 vs. 10.3 0/00 and 10.4 0/00, respectively) which reflects its higher trophic level. Higher 13C are found in common (-18.4 0/00) and striped dolphin (-18.10/00) muscles than in albacore tuna (-19.3 0/00). Differences also appear in heavy metal contents, especially cadmium in muscles, lower in albacore tuna than in dolphins (0.37 and 0.1 ppm DW for striped and common dolphins vs.<0.07 ppm DW for albacore tuna) which probably reflects in dolphins a cadmium contamination through squid assimilation. These results suggest that, despite a close hunting association, the trophic position of these three predators is quite well distinct. |
author2 |
MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège |
format |
Conference Object |
author |
Das, Krishna Bouquegneau, Jean-Marie |
author_facet |
Das, Krishna Bouquegneau, Jean-Marie |
author_sort |
Das, Krishna |
title |
Trophic position and cadmium content of dolphins and tunas from the Northeast Atlantic |
title_short |
Trophic position and cadmium content of dolphins and tunas from the Northeast Atlantic |
title_full |
Trophic position and cadmium content of dolphins and tunas from the Northeast Atlantic |
title_fullStr |
Trophic position and cadmium content of dolphins and tunas from the Northeast Atlantic |
title_full_unstemmed |
Trophic position and cadmium content of dolphins and tunas from the Northeast Atlantic |
title_sort |
trophic position and cadmium content of dolphins and tunas from the northeast atlantic |
publishDate |
1999 |
url |
https://orbi.uliege.be/handle/2268/35468 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
European Research on Cetaceans - 13. Proceedings of the Thirteenth Annual Conference of the European Cetacean Society 5-8 April 1999., 403-405 (1999); Thirteenth Annual Conference of the European Cetacean Society, Valencia, Spain [ES], 5-8 avril 1999 |
op_relation |
https://orbi.uliege.be/handle/2268/35468 info:hdl:2268/35468 |
op_rights |
restricted access http://purl.org/coar/access_right/c_16ec info:eu-repo/semantics/restrictedAccess |
_version_ |
1796948718315896832 |