摘要
在水温17.3~28.0℃下,将体质量(4.60±0.30)g的大口黑鲈饲养在4口60 m3工厂化循环水养殖池中,放养密度67尾/m3,投喂大口黑鲈专用浮性颗粒配合饲料,研究大口黑鲈在工厂化循环水养殖条件下的生长规律。试验结果显示,养殖195 d后,大口黑鲈平均体质量为(303.14±73.17)g、平均体长为(26.76±3.13)cm;体质量(m)与日龄(t)间呈指数关系:m=0.0651t1.6147,r2=0.9974,平均体质量特定生长率为0.46%,平均体质量日增加量为(1.82±0.57)g;体长(L)与日龄间呈线性关系:L=0.0961t+9.1442,r2=0.9766,平均体长特定生长率为0.15%,平均体长日增长量为(0.10±0.04)cm;体质量与体长符合幂函数:m=0.0132L3.0455,r2=0.9828。在工厂化循环水养殖条件下大口黑鲈的相对增加量、特定生长率趋势基本一致,水温20℃以下明显影响其生长。
Largemouth bass Micropterus salmoides with body weight of(4.6±0.30)g was raised in four 60 m3 ponds with recirculating water at stocking density of 67 individuals/m3,and fed special floating formulated diet for 195 d at water temperature of 17.3—28.0℃to explore the growth characteristics of largemouth bass in a recirculating aquaculture system(RAS).The cultured largemouth bass had average body weight of(303.14±73.17)g and average body length of(26.76±3.13)cm in the RAS.The relationship between body weight and age was expressed as exponential equation as m=0.0651t1.6147,r2=0.9974,with average specific growth rate of 0.46%in body weight,and the average daily body weight gain of(1.82±0.57)g.The linear relationship between body length and age was described as L=0.0961t+9.1442,r2=0.9766,with average instantaneous growth rate of 0.15%in body length,and the average body length growth of(0.10±0.04)cm.The relationship between body weight and body length was in accordance with the power function at m=0.0132L3.0455,r2=0.9828.In RAS,the largemouth bass had basically the same relative weight gain and specific growth rate,and significantly lower growth at water temperature of below 20°C.The findings indicated that largemouth bass was suitable for aquaculture in RAS,with good growth rate and development prospects.
作者
韩晓磊
王浩
高俊杰
孙玉祥
张耀文
顾晓丁
徐建荣
HAN Xiaolei;WANG Hao;GAO Junjie;SUN Yuxiang;ZHANG Yaowen;GU Xiaoding;XU Jianrong(Changshu Institute of Technology, Changshu 215500, China;Changshu Yuntian Agricultural Technology Co, Ltd, Changshu 215500, China)
出处
《水产科学》
CAS
CSCD
北大核心
2020年第4期567-572,共6页
Fisheries Science
基金
江苏省水产三新工程项目(Y2017-29)。
关键词
大口黑鲈
工厂化循环水养殖
生长
水温
Micropterus salmoides
recirculating aquaculture system(RAS)
growth
water temperature
