title: Metal and metalloid bioaccumulation in the Pacific blue shrimp Litopenaeus stylirostris (Stimpson) from New Caledonia: laboratory and field studies.
abstract: The present work aimed at better understanding metal and metalloid bioaccumulation in the edible Pacific blue shrimp Litopenaeus stylirostris, using both laboratory and field approaches. In the laboratory, the bioaccumulation kinetics of Ag, Cd, Co, Cr, and Zn have been investigated in shrimp exposed via seawater and food, using the corresponding gamma-emitting radiotracers ((110 m)Ag, (109)Cd, (57)Co, (51)Cr, and (65)Zn) and highly sensitive nuclear detection techniques. Results showed that hepatopancreas and intestine concentrated the metals to the highest extent among the blue shrimp organs and tissues. Moulting was found to play a non negligible detoxification role for Co, Cr and, to a lesser extent, Zn. Metal retention by L. stylirostris widely varied (from a few days to several months), according to the element and exposure pathway considered (a given metal was usually less strongly retained when ingested with food than when it was taken up from the dissolved phase). In the field study, Ag, As, Cd, Co, Cr, Cu, Mn, Ni, and Zn were analysed in shrimp collected from a New Caledonian aquaculture pond. Metal concentrations in the shrimp muscles were generally relatively low and results confirmed the role played by the digestive organs and tissues in the bioaccumulation/storage/detoxification of metals in the Pacific blue shrimp. Preliminary risk considerations indicate that consumption of the shrimp farmed in New Caledonia is not of particular concern for human health.
authors.affiliation: International Atomic Energy Agency - Marine Environment Laboratories, 4 Quai Antoine Ier, MC-98000, Principality of Monaco, Monaco.
authors.forename: Marc
authors.initials: M
authors.lastname: Metian
authors.forename: Laetitia
authors.initials: L
authors.lastname: Hédouin
authors.forename: Mohamed M
authors.initials: MM
authors.lastname: Eltayeb
authors.forename: Thomas
authors.initials: T
authors.lastname: Lacoue-Labarthe
authors.forename: Jean-Louis
authors.initials: JL
authors.lastname: Teyssié
authors.forename: Chantal
authors.initials: C
authors.lastname: Mugnier
authors.forename: Paco
authors.initials: P
authors.lastname: Bustamante
authors.forename: Michel
authors.initials: M
authors.lastname: Warnau
mesh_terms: D000818:Animals; D043143:Hepatopancreas / Q000737:chemistry; D007422:Intestines / Q000737:chemistry; D058955:Metalloids / Q000032:analysis / Q000378:metabolism*; D019216:Metals, Heavy / Q000032:analysis / Q000378:metabolism*; D009510:New Caledonia; D033561:Penaeidae / Q000737:chemistry / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism*
chemical_list: D058955:Metalloids; D019216:Metals, Heavy; D014874:Water Pollutants, Chemical