【摘要】 在水温为19-26℃、盐度为25-32、pH值为7.5-8.4、溶氧量>3.0 mg/L的水体中进行为期50 d的青蟹室内单个体立体笼养试验.结果表明,青蟹笼养平均成活率为93.3%,个体平均增长率为33.7%,单位水体生物量为187.8g/m3;以单性全雌养殖效果最好,成活率为100%,个体增长率为46.3%,蜕壳率为77.8%,单位水体生物量为291.6 g/m3;体质量相对增长率为全♀>全♂>♀∶♂=2∶1>♀∶♂=1∶1(p<0.01);个体在完成蜕壳前的一段时间出现负增长;蜕壳后体质量、甲长和甲宽增幅分别为53.9%-67.3%(平均59.9%)、11.6%-25.6%(平均16.1%)和8.5%-19.3%(平均15.7%);体长、体质量与甲宽的关系分别为:♀y=0.690 3x+0.229 5(r=0.926 9)、♂y=0.593 4x+0.825 9(r=0.907),♀m=0.371 7x2.620 7(r=0.930 1)、♂m=0.150 8x3.1447(r=0.890 4).青蟹室内单个体立体笼养各项生产性能指标均优于其它养殖模式,因此这种养殖模式是可行的.更多还原

【Abstract】 Experimental studies on individual cultivation of Scylla paramamosain with segregative cages in hatchery were carried out for 50 days,under the experimental condition with water temperature of 19～26℃,salinity of 25～32,pH of 7.5～8.1 and DO>3.0 mg/L.The carapace length,width and body mass of crab were periodically measured,and individual growth feature was analyzed by statistical feasible,with an average stocking density of 14.5 ind/m3,survival rate of 93.3%,individual growth of 33.7% and production of 187.8 g/m3.The effect of monosex cultivation of female crabs is better compared to other sex proportion,with an average survival rate of 100%,individual growth rate of 46.3%,exuviae rate of 77.8% and production of 291.6 g/m3.The increase of body mass of crabs was mono♀>mono♂> ♀∶♂=2∶1>♀∶♂=1∶1(p<0.01).There was a negative increase of body mass before exuviation;and after exuviation,the increase of body mass,carapace length and width of the crabs respectively were 53.9%～67.3%(average 59.9%),11.6%～25.6%(average 16.1%)and 8.5%～19.3%(average 15.7%).The relationships between the carapace length,the body mass and the carapace width of the crabs respectively were: ♀y=0.690 3x+0.229 5(r=0.926 9),♂y=0.593 4x+0.825 9(r=0.907),♀m=0.371 7x2.620 7(r=0.930 1),♂m=0.150 8x3.144 7(r=0.890 4).The production performance of cage-cultivated crabs was better than that of crabs which were cultivated in other modes,so it is feasible to individually cultivate Scylla paramamosain with segregative cages in hatchery.更多还原