凡纳滨对虾高密度养殖实验

INTENSIVE CULTURE OF SHRIMP LITO PENAEUS VANNAMEI

实验时间 4 0天 ,放苗密度 5 0 0尾 /m2 、10 0 0尾 /m2 。凡纳滨对虾初体长为 2 .5 88±0 .341cm ,初体重 (0 .2 39± 0 .0 86 ) g。养殖水体中放置筛绢隔断 ,在不换水的条件下 ,监测水体中无机磷、氨氮的变化趋势 ,初步实验高密度和分隔养殖的效果。结果表明 ,高、低密度氨氮、无机磷差异均为极显著 (P <0 .0 1) ;成活率、产量差异均为显著 (P <0 .0 5 )。高、低密度特定生长率 体重 差异不显著 (P >0 .0 5 )。观察到不同时间不同密度凡纳滨对虾对筛绢隔断的反应不同 ,表明对虾能利用隔断筛绢 。

Intensive culture (500 individuals/m) was conducted with separatory work of 20 meshes each and without water exchange. Dynamic monitoring of inorganic phosphorus and NH-N was carried out. The results showed that there was an inverse relationship between different stocking densities in survival (p>0.05). Different reaction of Lito Penasus vannamei to the sepavatory silk work was discovered, which suggests that we can enhance the carrying capacity by setting separatory silk works.