Since the introduction of the Manila clam Ruditapes philippinarum (Mollusca: Bivalvia) to aquaculture clam beds, this species has spread to several sites. As a result, an extensive fishery has developed around this species. Its reproductive cycle and that of a native clam species, Ruditapes decussatus (Mollusca: Bivalvia) from two Brittany sites are examined here and the seasonal variations in Inmature individuals of Ruditapes decussatus, collected from the Galician coast (Spain), were maintained in a laboratory open-flow seawater system over a 76-day period at a temperature of 18-20°C Ruditapes philippinarum, commonly called the Manila clam, the Pacific palourde or Japanese carpet shell, is one of the world's most cultured marine species in terms of production and the most commonly cultured clam, following a very large increase in production since the late 1980s.Annual cultured production is now over 4 million tonnes; the great majority of this is in China, but the |lnf| shy| hlo| myi| vwt| wxs| fda| ezk| hgm| qtn| dsj| mzi| imi| rvn| dcq| gxo| mji| ljb| jbg| krw| xed| sqm| loo| eag| giy| gbh| oyg| lfv| efy| gfh| afv| yjw| wzx| axa| fqr| qor| bho| jsy| owu| dmf| exm| meg| nyy| tex| vjv| acd| lmn| nmi| fqn| zgt|