Bioaccumulation of trace elements in pelagic fish from the Western Indian Ocean.
Trace elements were analyzed in fish of commercial interest to determine their importance in marine systems of the Western Indian Ocean and their bioaccumulation patterns. The results are equivalent or lower than levels reported in ichthyofauna worldwide. Certain values of muscular Cd, Hg, Pb and Zn were, however, above thresholds for human consumption. Levels varied among tissues, species and fish length, but were seldom influenced by the nutritional condition of the fish, its gender and its reproductive status. Correlations between hepatic Hg and Se levels in Swordfish (r2=0.747) and Yellowfin Tunas (r2=0.226), and among metallothionein linking metals imply the existence of detoxification processes in these species. Level differences between fish from the Mozambique Channel and Reunion Island reflect differences of diets rather than differences of elemental availability in both environments.
Kojadinovic
Jessica
J
Université de La Réunion, ECOMAR, EA 33, Saint-Denis F-97715, France. jessica.kojadinovic@univ-nantes.fr
Potier
Michel
M
Le Corre
Matthieu
M
Cosson
Richard P
RP
Bustamante
Paco
P
D000818:Animals; D049628:Body Size; D002104:Cadmium / Q000032:analysis / Q000493:pharmacokinetics; D005260:Female; D019156:Indian Ocean; D007668:Kidney / Q000378:metabolism; D007854:Lead / Q000032:analysis / Q000493:pharmacokinetics; D008099:Liver / Q000378:metabolism; D008297:Male; D008628:Mercury / Q000032:analysis / Q000493:pharmacokinetics; D019216:Metals, Heavy / Q000032:analysis* / Q000493:pharmacokinetics; D009132:Muscles / Q000378:metabolism; D010473:Perciformes / Q000378:metabolism*; D012098:Reproduction / Q000502:physiology; D012643:Selenium / Q000032:analysis / Q000493:pharmacokinetics; D012737:Sex Factors; D013045:Species Specificity; D014413:Tuna / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000493:pharmacokinetics; D015032:Zinc / Q000032:analysis / Q000493:pharmacokinetics
D019216:Metals, Heavy; D014874:Water Pollutants, Chemical; D002104:Cadmium; D007854:Lead; D008628:Mercury; D012643:Selenium; D015032:Zinc