A study of trophic structure, physiological condition and mercury biomagnification in swordfish (Xiphias gladius): Evidence of unfavourable conditions for the swordfish population in the Western Mediterranean
| Type | Article | ||||||||||||
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| Date | 2022-03 | ||||||||||||
| Language | English | ||||||||||||
| Author(s) | Biton-Porsmoguer Sebastián1, 2, Bănaru Daniela3, Harmelin-Vivien Mireille3, Béarez Philippe4, Bouchoucha Marc5, Marco-Miralles Francoise 5, Marquès Montse6, Lloret Josep2 |
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| Affiliation(s) | 1 : French Biodiversity Agency (OFB), Channel and North Sea Delegation, 4 rue du Colonel Fabien, BP 34, 76083 Le Havre, France 2 : University of Girona, Institute of Aquatic Ecology, Faculty of Sciences, C/Maria Aurèlia Capmany 69, E-17003 Girona, Catalonia, Spain 3 : Aix-Marseille University, CNRS/INSU, Toulon University, IRD, Mediterranean Institute of Oceanography (MIO) UM 110, Campus de Luminy, 13288 Marseille, France 4 : Archéozoologie, archéobotanique: sociétés, pratiques et environnements (AASPE, UMR 7209), CNRS/MNHN, Muséum national d'histoire naturelle, 55 rue Buffon, 75005 Paris, France 5 : Ifremer, Lab Environm Ressources Provence Azur Corse, CS 20330, F-83507 La Seyne Sur Mer, France 6 : Laboratory of Toxicology and Environmental Health, School of Medicine, IISPV, Universitat Rovira i Virgili, 43201 Reus, Catalonia, Spain |
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| Source | Marine Pollution Bulletin (0025-326X) (Elsevier BV), 2022-03 , Vol. 176 , P. 113411 (10p.) | ||||||||||||
| DOI | 10.1016/j.marpolbul.2022.113411 | ||||||||||||
| WOS© Times Cited | 5 | ||||||||||||
| Keyword(s) | Swordfish, Fisheries, Mercury, Biomagnification, Condition, Catalan Sea | ||||||||||||
| Abstract | Studies integrating trophic ecology, physiological condition and accumulation of heavy metals in top predators, such as swordfish, are needed to better understand the links between them and the risk to humans associated with consumption of these fish. This research focuses on the swordfish of the Catalan Sea and follows a multi method approach that considers their diet, their liver lipid content, and mercury accumulation in their bodies as well as in their prey. The aim is to highlight the links between trophic ecology, physiology (fish condition), and eco-toxicology. Results indicate that poor condition of swordfish based on size and the levels of lipid in the liver, and the high Hg levels accumulated to the trophic web (particularly from cephalopods) may indicate potential unfavourable feeding and reproduction conditions for swordfish in the NW Mediterranean and this warrants further investigation. |
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