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Metal and metalloid bioaccumulation in the Pacific blue shrimp Litopenaeus stylirostris (Stimpson) from New Caledonia: Laboratory and field studies ArchiMer
Metian, Marc; Hedouin, Laetitia; Eltayeb, Mohamed M.; Lacoue-labarthe, Thomas; Teyssie, Jean-louis; Mugnier, Chantal; Bustamante, Paco; Warnau, Michel.
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 (Ag-110m, Cd-109, Co-57, Cr-51, and Zn-65) 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...
Tipo: Text Palavras-chave: Crustacean; Metals; Biokinetics; Radiotracers; Moulting; Contamination.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00014/12528/9869.pdf
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Leaching of flame-retardants from polystyrene debris: Bioaccumulation and potential effects on coral ArchiMer
Aminot, Yann; Lanctôt, Chantal; Bednarz, Vanessa; Robson, William J.; Taylor, Angus; Ferrier-pagès, Christine; Metian, Marc; Tolosa, Imma.
Marine plastic debris can act as a reservoir of chemical additives that can pose a potential threat to sensitive ecosystems such as coral reefs. A survey of foam macrodebris collected on beaches indeed revealed high concentrations of hexabromocyclododecanes (ΣHBCDD) in polystyrene (PS) samples (up to 1940 μg g−1). Results also showed that PS fragments can still leach over 150 ng g−1 d−1 of ΣHBCDD (primarily as the α-isomer) for relatively long durations, and that these additives are readily bioaccumulated and well-retained by corals. Despite significant HBCDD bioaccumulation in coral tissue, short-term exposure to HBCDD or PS leachate had no considerable effect on coral photosynthetic activity, symbiont concentration and chlorophyll content. Exposure to...
Tipo: Text Palavras-chave: Marine plastic; Polystyrene foam; Leachates; Hexabromocyclododecanes; Corals; Bioconcentration.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00606/71800/70335.pdf
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Interplay between hormonal and morphological changes throughout a critical period of larval rearing in the orbicular batfish ArchiMer
Waqalevu, Viliame; Besson, Marc; Gache, Camille; Roux, Natacha; Fogg, Lily; Bertucci, Frédéric; Metian, Marc; Lafille, Marc-andre; Maamaatuaiahutapu, Moana; Gasset, Eric; Saulnier, Denis; Laudet, Vincent; Lecchini, David.
Advancement and diversification of the aquaculture industry is reliant on the development of captive breeding and rearing protocols for novel fish species. Orbicular batfish (Platax orbicularis), a major emerging species in Polynesian aquaculture, live in brackish and marine waters around coral reefs, and are highly prized by Pacific Island communities for their high-quality meat. The present study describes the larval growth of P. orbicularis from hatching until 16 days after hatching (DAH) using meristics and thyroid hormone (T3) quantification. Our study highlighted that metamorphosis of P. orbicularis is critical to their production in aquaculture, as found for other species. Levels of the thyroid hormone T3 in P. orbicularis reached a peak at 12 DAH...
Tipo: Text Palavras-chave: Larval rearing; Mariculture; Metamorphosis; South pacific countries; Coral reefs.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00656/76816/77989.pdf
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