摘要
挑选受精卵颜色呈褐色或接近褐色的抱卵虾,放入网箱多点布局孵化,直接放流孵出幼体是大水面日本沼虾资源增殖的有效方法.2001年,采用此法对湖北省阳新县网湖日水沼虾进行增殖,其产量从增殖前(2000年)的10000kg上升至35000kg,取得显著增殖效果,进箱孵化的抱卵数量(N,kg)可用计划生产量(Y,kg),总回捕率(R)及个体平均体重(W,g/ind)计算:N≥Y·(1000·R·W)-1.
The artificial enhancement technique of freshwater shrimp Macrobrachium nipponensis in inland waters was studied in 2000 ~ 2001. It could be concluded that to select the egg-carrying shrimps whose embryos arc brown or analogous brown to hatching in net-cages, and distributee evenly in the whole water, and then release directly the larvae into the whole water is an effective method. Through this method, the output of Macrobrachium nipponensis in Lake Wanghu situated in county Yangxin of Hubei Province has been increased obviously from 10000 kg, before artificial enahnccment (in 2000), to 35000kg, after artificial enahncement (in 2001). The number (N, kg) of egg-carrying shrimps which are hatched in net-cages could be calclated according to the formula: N>2Y (1000 R W)-1 ,where R means the general recapture rate (normally, <5%) ,W(g/ ind) means mean body weight, and Y (kg) means plan yield, seperately.
出处
《湖泊科学》
EI
CAS
CSCD
2002年第4期377-380,共4页
Journal of Lake Sciences
基金
湖北省重点科技发展项目(95012X03)
关键词
日本沼虾
人工增殖
放流技术
投放
人工孵化
Macrobrachiumnipponensis, artificial enhancement, inland waters
