Ciguatera and man’s influence in New Caledonia : the Bay of Prony, construction site of nickel plant and Ouvea tropical atoll “s

Titre: 
Ciguatera and man’s influence in New Caledonia : the Bay of Prony, construction site of nickel plant and Ouvea tropical atoll “safe” from ciguatera outbreaks
Auteurs: 
Kerbrat AS, Videault A, Pauillac S, Chinain M, Laurent D
Type de communication: 
Poster
Conférence: 
Congrès Ciguatéra et Biotoxines associées (Nouméa, Nouvelle-Calédonie)
Année: 
10/2008

Ciguatera is a common marine intoxication, caused by the consumption of coral reef fish which accumulate toxins through their diet. It is an ecotoxicological phenomenon induced by natural or man-made disturbances of coral reef ecosystems. This is followed by the proliferation of macro-algae which are ideal substrates of micro-organisms. Among these, certain strains of the dinoflagellate Gambierdiscus spp. are known to produce ciguatoxins (CTXs), responsible for human intoxications. More recently, benthic cyanobacteria were also incriminated as potential progenitors of CTX-like compounds.
Environmental and anthropics factors enhancing the proliferation of these micro-organisms, resulting in ciguatera outbreaks, are still unclear. In order to improve the management of the risk of ciguatera outbreaks, large-scale surveys in New Caledonia were undertaken in two sites chosen for their particular situation : (i) the Bay of Prony, currently in development of port facilities for mining construction and (ii) the lagoon of Ouvea reputed to be free of ciguatera. Here, we present the methodology of our on-going survey and some of the preliminary results obtained.
Workshop international Ciguatéra et biotoxines associées (Nouméa, 27-31 octobre 2008)