湖北道观河水库青梢鲌(Culter dabryi)的个体生殖力  

FECUNDITY OF CULTER DABRYI IN DAOGUANHE RESERVOIR,WUHAN,CHINA

作　　者：王银东[1,2] 熊邦喜[1] 马徐发[1] 徐木生 张林林 王喜波 胡秋生 

机构地区：[1]华中农业大学水产学院 [2]安徽省农业科学院水产研究所合肥230031 [3]武汉市水务局 [4]武汉市道观河水库渔场

出　　处：《海洋与湖沼》2007年第2期180-186,共7页Oceanologia Et Limnologia Sinica

基　　金：国家自然科学基金资助项目;39870597号。

摘　　要：于2001年4、5月份,从道观河水库中随机采集青梢鲌成熟雌体53尾,用鳞片鉴定年龄(A),测量了体长(L)、体重(W)、净体重和性腺重(Wo)等形态学指标,计数个体绝对生殖力(F),并计算出青梢鲌的体长相对生殖力(FL)、相重相对生殖力(FW)、肥满度(CF)和成熟系数(GSI)等,用8种数学模式及多元回归方程拟合了青梢鲌个体生殖力与形态学指标间的关系。结果表明,青梢鲌样本由1+—4+龄鱼组成;其个体绝对生殖力与体长、体重和年龄分别呈抛物线、幂函数和幂函数相关,相关式分别为:F=-1.032+0.00754L2(n=53,R2=0.6920,P<0.01),F=0.0287W0.911(n=53,R2=0.7315,P<0.01),F=0.339A1.489(n=53,R2=0.6211,P<0.01);体长相对生殖力与体长、体重和年龄分别呈对数函数、对数函数和直线相关,相关式分别为:FL=-4995.579+2001.462lnL(R2=0.7315,n=53,P<0.01),FL=-1869.419+622.496lnW(R2=0.7315,n=53,P<0.01),FL=-71.679+6323.410A(R2=0.7315,n=53,P<0.01);体重相对生殖力均值约219粒/g,变幅主要为150—300粒/g;多元逐步回归分析其绝对生殖力和体长相对生殖力均与多个指标密切相关,相关式分别为:F=-1.248+0.070GSI+0.0571L×W(n=53,R2=0.8212,P<0.01),FL=-1050.940-26.756W+46.031Wo+97.941L×W(n=53,R2=0.7243,P<0.01);而体重相对生殖力仅与成熟系数有相关性:FW=144.186+8.222GSI(n=53,R2=0.3246,P<0.01)。Daoguanhe Reservoir （30°52＇N, 114°59＇E）, situated in Wuhan, Hubei Province of China, is a middle-sized reservoir built in 1968. In normal condition, its maximum water depth is 78.7m, in average of 10.3m; water capacity is 0.64 × 109m^3; piscicultural area is 500ha. Culter dabryi is a common economical fish in lake or reservoir in China from south to north, preying on small wild fish. Study on C. dabryi has so far not been reported overseas, to the best knowledge of the authors. Chinese researches have been conducted in morphology, food, distribution, scales, growth, and condition factor. C. dabryi was a common fish species and made up of 5% of total fish production in reservoir in China. However, the production has been declined in recent year due to natural factor and human activities. To find a solution to the problem, the fecundity of C. dabryi was studied in Daoguanhe Reservoir for remedying and developing the resource. Fifty-three sexually matured specimens were collected in age of between 1 to 4 years, among them the number of 1^＋, 2^＋, 3^＋, and 4^＋year-old were 14, 29, 7 and 3, respectively. The individual absolute fecundity of them was ranged 5-25 thousands eggs, averaged at 17.7 thousands eggs. The relative fecundity per centimeter was ranged 400-1200egg/cm, and 857eggs in average. The relative fecundity per gram was ranged 150-300egg/g, in average of 219egg/g. Relationship between its absolute fecundity and body length, body weight and age were regressed in quadratic, exponential and exponential equation. Relationship between relative fecundity per centimeter and body length, body weight and age could be described by logarithmic and linear equation. Multi-regressive analyses showed that both absolute and relative fecundities per centimeter are significantly related with several indices, such as length, weight, maturity, age and fatness, etc. However, the relative fecundity per gram was related with maturity only. The individual fecundity could be estimated, and reproductio

关 键 词：青梢鲐 个体生殖力 道观河水库 

分 类 号：S932.4[农业科学—渔业资源]