Geographic, seasonal and ontogenetic variation in cadmium and mercury concentrations in squid (Cephalopoda: Teuthoidea) from UK waters

Abstract : Cadmium (Cd) and mercury (Hg) levels were measured in the tissue samples of two loliginid (Alloteuthis sp. and Loligo forbesi) and two ommastrephid (Todarodes sagittatus and Todaropsis eblanae) squid species collected from research cruise and fishery (market) samples in UK waters during 2004–05. Concentrations of Cd were generally higher in the ommastrephids, in all tissues except muscle. Hg concentrations were higher in T. sagittatus than in the loliginids. In L. forbesi, metal concentrations differed between tissues and also varied in relation to body size, geographic origin and season. Cd levels decreased with increasing body size. This may be related to a shift in the diet with growth, since small L. forbesi feed on benthic invertebrates that have relatively high Cd concentrations, whereas larger individuals prey mainly on fish that have low Cd concentrations. Hg levels increased with body size, indicating its retention, and they were highest at the end of the spawning season and in squid from the English Channel and the Scottish West Coast. It is likely that the ambient concentration of Hg in seawater plays an important part in its accumulation in squid tissues. As it is a short-lived species, L. forbesi may therefore function as a bioindicator species for Hg contamination of the marine environment. Our results indicate that there is no significant danger to humans from consuming squid from UK waters.
Type de document :
Article dans une revue
Ecotoxicology and Environmental Safety, Elsevier, 2008, 70 (3), pp.422-432. 〈10.1016/j.ecoenv.2007.07.007〉
Liste complète des métadonnées

Littérature citée [71 références]  Voir  Masquer  Télécharger

https://hal.archives-ouvertes.fr/hal-00281756
Contributeur : Paco Bustamante <>
Soumis le : samedi 24 mai 2008 - 00:19:45
Dernière modification le : jeudi 11 janvier 2018 - 06:23:34
Document(s) archivé(s) le : vendredi 28 mai 2010 - 20:03:19

Fichier

Pierce_et_al_EES_2008.pdf
Fichiers éditeurs autorisés sur une archive ouverte

Identifiants

Collections

Citation

Graham Pierce, Gabriele Stowasser, Lee Hastie, Paco Bustamante. Geographic, seasonal and ontogenetic variation in cadmium and mercury concentrations in squid (Cephalopoda: Teuthoidea) from UK waters. Ecotoxicology and Environmental Safety, Elsevier, 2008, 70 (3), pp.422-432. 〈10.1016/j.ecoenv.2007.07.007〉. 〈hal-00281756〉

Partager

Métriques

Consultations de la notice

503

Téléchargements de fichiers

313