广东北江马口鱼个体生殖力研究  

Study on Individual Fecundity of Opsariichthys bidens of the Beijiang River in Guangdong Province

作　　者：李强[1] 蓝昭军[2] 赵俊[2] 陈龙秀[2] 钟良明 易祖盛[1] 舒琥[1] 李海燕[1] 

机构地区：[1]广州大学生命科学学院,广州510006 [2]华南师范大学生命科学学院,广州510631 [3]韶关市水产研究所,广东韶关512000

出　　处：《四川动物》2010年第3期440-445,共6页Sichuan Journal of Zoology

基　　金：广东省科技计划项目(2005A20105001;2006B20701001;2006B20201002);广东重大科技兴海(渔)项目(B200601G02);广州大学创新团队项目(1001-1012)

摘　　要：于2009年3、4月,从北江中随机采集成熟度为Ⅳ期的马口鱼雌性个体55尾,测量体长(L)、体重(W)、净体重(Wn)和性腺重(Wo)等形态学指标,并用鳞片鉴定年龄,用重量法计数绝对生殖力(F),计算出体长相对生殖力(FL)、体重相对生殖力(FW)、成熟系数(GSI)和丰满度(K),并用5种数学模型及多元逐步回归方程拟合了马口鱼绝对生殖力与生物学指标的关系。结果表明,用于统计生殖力的马口鱼样本由1+～3+龄3个龄组组成;绝对生殖力在1486.29～12025.78粒之间,平均为4842.42粒;体长相对生殖力在163.33～856.27粒/cm之间,平均为437.30粒/cm;体重相对生殖力在99.77～470.27粒/g之间,平均为207.29粒/g。绝对生殖力与体长、体重、净体重、性腺重、年龄呈抛物线相关,与成熟系数呈幂函数相关,与丰满度的关系不显著。多元逐步回归分析表明,绝对生殖力与体重和成熟系数密切相关,相关式为:F=-312.129+137.765W+108.715GSI(R2=0.719,n=55,F=57.089,P<0.001)。The individual fecundity of Opsariichthys bidens,which were collected in March and April 2009 in the Beijiang River,were studied. The results are summarized as follows. The absolute fecundity of Opsariichthys bidens,varies from1486.29 to 12 025.78（average 4842.42） eggs. The relative fecundity of body length ranges from 163.33 to 856.27 （average 437.30） eggs/cm. The fecundity of body weight ranges from 99.77 to 470.27 （average 207.29） eggs/g. The relationship between the absolute fecundity and body length （L）,body weight （W）,net body weight （W n）,ovary weight （W o）,and age （t）could be described by a quadratic equation,and the relationship between the absolute fecundity and gonadosomatic indices （GSI）,can be regressed by an exponential equation. The absolute fecundity has no obvious relationship with fullness （K）. Multi-stepwise regressive analyses show that the absolute fecundity is significantly related with both body weight （W） and gonadosomatic indices （GSI）,and the regression equation is F=-312.129＋137.765W＋108.715GSI （R2 =0.719,n=55,F=57.089,P0.001）.

关 键 词：马口鱼 个体生殖力 生物学指标 北江 

分 类 号：S917.4[农业科学—水产科学]