诱导池养斑节对虾的性腺发育与产卵

INDUCEMENT ON OVARIAN DEVELOPMENT,MATURATION AND SPAWNING IN PENAEUS MONODON FABRICIUS GROW-OUT FROM EARTH PONDS

室内条件下,采用切除、烫灼眼柄及蓝、绿色光源光照,可有效诱导池养斑节对虾的卵巢获得不同程度发育或成熟产卵,有效率分别为64.8％和15.5％,总有效率达80.3％。亲虾个体大小及水温与卵巢发育或产卵的关系密切。体重70克以上的亲虾卵巢易催熟,性腺发育成熟大多出现在水温较高的 5—9月份(平均水温 25.0—29.5℃),尤其产卵仅在这些月份发生。亲虾产卵量较少(每尾 3—11万个/次)。室内环境下亲虾无自然交配,卵子不能孵化,仅其中一次产卵中,进行了人工交配孵化出无节幼体。

The ovarian development, maturation and spawning in grassprawn, P. monodon from grow-out adults in the earth ponds could effectively beinduced under the laboratory conditions. By adopting the techniques of unieyestalkablation and/or exposed in dim blue and green light intensity(80-120 lux),ovariandevelopment and maturation or spawning of feamles occured respectively in64.8% and 15.5% of test animals, with a total induced effect of 80.3 percent. Thefemales showed their ovarian development in 10 days or longer after the inducedtreatment. Prawnts size and seawater temperature were closely related to gonadal develop-ment and spawning. Usually the females with a body weight over 70 gram in theseason of May to September with a higher water temperature (average T of 25.0--29.5℃) were more easily successful in inducement. Spawning behavior of females(11 times in total during experimental period) occured only in those months withhigher water temperature.