Presoaking effects of spat collectors in seawater containing adult live diploid pacific oysters (Crassostrea gigas) on the settlement of triploid oyster larvae
2007
Hirata, Y.(Hiroshima-ken. Technology Research Inst., Kure (Japan). Fisheries and Ocean Technology Center) | Wakano, M. | Matsubara, D. | Nagasawa, K.
The purpose of the present study is to assess the effects of spat collectors presoaked with seawater containing adult live diploid Pacific oysters (Crassostrea gigas) on the settlement of larval triploid Pacific oysters to develop an artificial, mass setting method. Scallop (Patinopecten yessoensis) shells used as spat collectors were presoaked for 8 days in seawater containing adult live diploid Pacific oysters before experimental setting. These presoaked scallop shells had 8-12 times as many spats as those scallop shells without pretreatment. The larval settlement on the shells completed within 24 hours of the experiment. These results show that presoaking of spat collectors in seawater containing adult live diploid oysters may be useful and efficient in mass collection of triploid oyster larvae at hatcheries.
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