摘要
通过室内60 d罗氏沼虾幼虾养殖试验,研究了不同养殖密度（150 ind/m3、400 ind/m3、550 ind/m3、800 ind/m3）对水质与幼虾生长特点的影响。试验发现,各密度组水质指标pH、DO、TAN、NH3-N、NO2--N和CODMn均控制在罗氏沼虾生长的适合范围之内,密度对主要水质指标未产生显著性影响;不同养殖密度对幼虾生长指标产生不同程度的影响,最低密度组成活率和增长率与其他各组存在显著性差异（P〈0.05）,次低密度组增长率与最高密度组存在显著性差异（P〈0.05）,最低密度组的增重率与其他各组存在极显著差异（P〈0.01）;4种密度组的罗氏沼虾幼虾体重（w）和体长（L）之间的关系都符合幂函数方程：w=aLb（a的范围为0.013 2~0.015 1,b的范围为3.433 0~3.502 1）;体长（L）和养殖天数（d）间符合线性相关：L=ad＋b（a的范围为0.038 5~0.049 2,b的范围为1.801 1~1.886 1）。室内高密度养殖罗氏沼虾幼虾可据自身养殖条件,参考150~400 ind/m3选用布苗密度。
This study analysed the effect on water quality and growth characteristics of juvenile shrimps Macrobrachium rosenbergii in different socking densities（150 ind∕m3,400 ind∕m3,550 ind∕m3,800 ind∕m3） by 60-day indoor culture experiment.The results showed that the water quality indexes of different densities groups,such as pH,DO,TAN,NH3-N,NO2——N,CODMn were effectively controlled within safe range.There was no significant difference among main water quality indexes in different stocking densities.Different densities partly had influence on the growth of juvenile shrimps.The survival rate and growth rate of the lowest density group were significantly different from the other groups（P0.05）,while significant difference was found on growth rate between the second lowest density group and the highest density group（P0.05）.The weight gain rate of the lowest density group was significantly different from the other groups（P0.01）.By regession analysis,the regression equations of the body weight（w）-length（L） relationship of juvenile shrimps Macrobrachium rosenbergii were obtained as w=aLb（a：0.013 2-0.015 1,b： 3.433 0-3.502 1）,and the relationship of body length and culture days met linear correlation as L=ad＋b（a： 0.038 5-0.049 2,b： 1.801 1-1.886 1）.Indoor high-density culture of juvenile shrimps Macrobrachium rosenbergii should be based on their own conditions,the stocking densities of 150-400 ind/m3 could be employed.
出处
《上海海洋大学学报》
CAS
CSCD
北大核心
2010年第2期184-189,共6页
Journal of Shanghai Ocean University
基金
上海市科技兴农重点攻关项目[沪农科攻字(2006)第9-4号]
关键词
罗氏沼虾
密度
水质
成活率
Macrobrachium rosenbergii
density
water quality
survival
