@article{fdi:010037826,
  title = {{N}ickel bioaccumulation in bivalves from the {N}ew {C}aledonia lagoon : seawater and food exposure},
  author = {{H}{\'e}douin, {L}aetitia and {P}ringault, {O}livier and {M}etian, {M}. and {B}ustamante, {P}. and {W}arnau, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {N}ew {C}aledonian lagoon is submitted to intense heavy metal input from land-based {N}i mining. {T}herefore, the use of sentinel species is strongly recommended in order to develop and implement coastal zone management programmes of the metal contamination. {T}he tropical oysters {I}sognomon isognomon and {M}alleus regula and the clam {G}afrarium tumidum were previously proposed as such possible sentinel organisms and were thus investigated in this context. {T}he three species were exposed to {N}i via seawater or food using radiotracer techniques. {R}esults indicate that uptake and retention efficiencies of {N}i are independent of the dissolved {N}i concentrations in the surrounding seawater. {H}ence, for the three species, body concentrations of {N}i taken up from the dissolved phase are directly proportional to the ambient dissolved concentrations. {B}iokinetic patterns indicated that the major part of {N}i was rapidly lost from bivalves during the first days of depuration, whereas 7 to 47% of {N}i-63 were retained in tissues with a biological half-life not significantly different from infinity. {F}inally, feeding experiments showed that {N}i ingested with food (phytoplankton) was assimilated more efficiently in clams (assimilation efficiency, {AE} = 61%) than in oysters ({AE} = 17%), and was strongly retained ({T}-b1/2 >= 35 d) in the tissues of both bivalves. {I}t is concluded that the investigated species examined are efficient bioaccumulators of {N}i from both the surrounding seawater and the food, and that they would be useful bioindicators for monitoring the status of {N}i contamination in tropical coastal waters.},
  keywords = {metal ; molluscs ; mining activities ; bioindicator ; radiotracer},
  booktitle = {},
  journal = {{C}hemosphere},
  volume = {66},
  numero = {8},
  pages = {1449--1457},
  ISSN = {0045-6535},
  year = {2007},
  DOI = {10.1016/j.chemosphere.2006.09.015},
  URL = {https://www.documentation.ird.fr/hor/fdi:010037826},
}