Comparison Between Microsurgery and Traditional Egg Removal from Starry Sturgeon, Acipenser stellatus, Broodstock

摘要

Reuse of sturgeon broodstock for propagation could provide opportunity to ease fishing pressure on the wild stocks of these valued species. This study was carried out to evaluate the microsurgery procedure for egg removal from a sturgeon species, starry surgeon, Acipenser stellatus, and to compare the result with the traditional procedure of egg removal from the abdomen of sacrificed fish. In comparison to the traditional procedure, microsurgery is rapid which can be performed between 5 and 17 min per fish. Rates of hatching using microsurgery (41%) and the traditional (43%) procedures were similar. Fish remained healthy 4 mo after microsurgery. Eggs obtained by microsurgery were only 10% less in volume than eggs obtained by traditional procedure. Although some eggs are lost in microsurgery, reuse of females as potential broodstock would easily compensate for the lower egg volume. It can be concluded that microsurgery is an appropriate procedure for collection of ovulated eggs from starry sturgeon.