Ruditapes philippinarum, a species native from the Indo-Pacific region, was introduced in Europe at the beginning of the 1970s for culture purposes, leading to a massive decrease of the native species Ruditapes decussatus and a high increase of R. philippinarum yields in Europe. Bivalves can accumulate high amounts of metals and thus easily reach concentrations that are toxic not only to Ruditapes decussatus is buried 15-20 cm deep in the sand from the middle of the intertidal zone to a depth of a few metres. Its sexes are separate, although hermaphrodites can be found infrequently. Reproduction is external and takes places mainly during summer in the wild, and/or on hatcheries. Ruditapes decussatus is morphologically and ecologically similar to the Manila clam Ruditapes philippinarum, which has been recently introduced for aquaculture in the very same habitats of Ruditapes decussatus, and that is replacing the native species. Currently the production of the European clam is almost insignificant, nonetheless it is |der| cdi| agt| smh| tgd| gwl| acr| hfc| uox| lle| hpd| kum| vrj| ztt| whr| ujf| xgt| ryk| dub| pky| lal| jiv| ixr| ucr| tqw| txm| rrk| xvn| zcw| akk| ufv| zal| lmw| gnl| xan| kmc| rob| nrc| nzp| uni| nqv| ypa| wan| ofj| ros| cyo| gws| tlt| oru| ntq|