High cadmium and mercury concentrations in the tissues of the orange-back flying squid, Sthenoteuthis pteropus, from the tropical Eastern Atlantic.

Lischka, Alexandra , Lacoue-Labarthe, T., Hoving, Henk-Jan T. , Javidpour, Jamileh , Pannell, J.L., Merten, Veronique, Churlaud, C. and Bustamante, P. (2018) High cadmium and mercury concentrations in the tissues of the orange-back flying squid, Sthenoteuthis pteropus, from the tropical Eastern Atlantic. Ecotoxicology and Environmental Safety, 163 . pp. 323-330. DOI 10.1016/j.ecoenv.2018.07.087.

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Abstract

The orange-back flying squid, Sthenoteuthis pteropus, plays an important role in the eastern tropical Atlantic Ocean (ETA) pelagic food web, as both predator and prey. Specimens of S. pteropus were caught off the Cape Verde Islands and concentrations of Ag, As, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb, Se, V, and Zn were measured in the digestive gland. Among the analysed elements, Cd showed the highest average concentration with values among the highest ever recorded in cephalopods. In addition to the digestive gland, Hg concentrations were also analysed in the buccal mass and mantle tissue. Among the three tissues, buccal mass showed the highest Hg concentrations. In females, Hg concentrations in the buccal mass were positively correlated with stable isotope ratios (δ13C and δ15N) and mantle length, showing both bioaccumulation with age and bioamplification along the trophic levels. High Cd and Hg concentrations in the digestive gland and muscle respectively would lead to elevated exposure of squid-eating top predators such as yellowfin tuna, swordfish or dolphinfish, which are commercially harvested for human consumption. This study provides a deeper understanding of the trace element contamination in an abundant and ecologically important, but poorly studied pelagic squid in the ETA.

Document Type: Article
Keywords: Bioaccumulation; Cephalopods; Contamination; Pelagic food web; Trace element
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EOE-N Experimental Ecology - Food Webs
OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EV Marine Evolutionary Ecology
OceanRep > The Future Ocean - Cluster of Excellence
OceanRep > The Future Ocean - Cluster of Excellence > FO-R10
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/j.ecoenv.2018.07.087
ISSN: 0147-6513
Projects: Future Ocean
Expeditions/Models/Experiments:
Date Deposited: 06 Aug 2018 10:41
Last Modified: 01 Feb 2019 15:06
URI: http://oceanrep.geomar.de/id/eprint/43940

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