Why is Asari (= Manila) clam Ruditapes philippinarum fitness poor in Arcachon Bay: a meta-analysis to answer?
|Author(s)||De Montaudouin X.1, Lucia M.1, Binias C.1, Lassudrie Malwenn2, Baudrimont M.1, Legeay A.1, Raymond N.1, Jude-Lemeilleur F.1, Lambert C.2, Le Goic N.2, Garabetian F.1, Gonzalez P.1, Hegaret Helene2, Lassus Patrick3, Mehdioub W.3, Bourasseau L.1, Daffe G.1, Paul-Pont I.1, Plus Martin4, Do V. T.1, Meisterhans G.1, Mesmer-Dudons N.1, Caill-Milly Nathalie5, Sanchez Florence5, Soudant P.2|
|Affiliation(s)||1 : Univ Bordeaux, UMR EPOC CNRS, Stn Marine Arcachon, 2 Rue Pr Jolyet, F-33120 Arcachon, France.
2 : Univ Bretagne Occidentale, Lab Sci Environm Marin LEMAR, IUEM, UMR6539, Pl Nicolas Copernic, F-29280 Plouzane, France.
3 : IFREMER, Lab Phycotoxines, BP 21105, F-44311 Nantes 3, France.
4 : IFREMER, LER AR, Quai Commandant Silhouette, F-33120 Arcachon, France.
5 : IFREMER, Lab Ressources Halieut Aquitaine RBE HGS LRHA, 1 Allee Parc Montaury, F-64600 Anglet, France.
|Source||Estuarine Coastal And Shelf Science (0272-7714) (Academic Press Ltd- Elsevier Science Ltd), 2016-09 , Vol. 179 , P. 226-235|
|WOS© Times Cited||12|
|Note||Special Issue: Functioning and dysfunctioning of Marine and Brackish Ecosystems|
|Keyword(s)||Ruditapes philippinarum, Condition index, Perkinsus, Brown Muscle Disease, Element contamination, Immune system, Arcachon Bay|
|Abstract||Asari (= Manila) clam, Ruditapes philippinarum, is the second bivalve mollusc in terms of production in the world and, in many coastal areas, can beget important socio-economic issues. In Europe, this species was introduced after 1973. In Arcachon Bay, after a decade of aquaculture attempt, Asari clam rapidly constituted neo-naturalized population which is now fished. However, recent studies emphasized the decline of population and individual performances. In the framework of a national project (REPAMEP), some elements of fitness, stressors and responses in Arcachon bay were measured and compared to international data (41 publications, 9 countries). The condition index (CI=flesh weight/shell weight) was the lowest among all compared sites. Variation in average Chla concentration explained 30% of variation of CI among different areas. Among potential diseases, perkinsosis was particularly prevalent in Arcachon Bay, with high abundance, and Asari clams underwent Brown Muscle Disease, a pathology strictly restricted to this lagoon. Overall element contamination was relatively low, although arsenic, cobalt, nickel and chromium displayed higher values than in other ecosystems where Asari clam is exploited. Finally, total hemocyte count (THC) of Asari clam in Arcachon Bay, related to the immune system activity, exhibited values that were also under what is generally observed elsewhere. In conclusion, this study, with all reserves due to heterogeneity of available data, suggest that the particularly low fitness of Asari clam in Arcachon Bay is due to poor trophic condition, high prevalence and intensity of a disease (perkinsosis), moderate inorganic contamination, and poor efficiency of the immune system.|