北江黄尾鲴个体生殖力的研究

研究了北江流域黄尾鲴的个体生殖力及其与性成熟雌性个体多项生物学指标的关系，结果表明:黄尾鲴个体绝对生殖力F在35 707(粒)～191 917(粒)之间，平均为 101 038(粒)；个体体长相对生殖力FL在1 962～7 719（粒cm-1）之间，平均为4379 (粒cm-1)；个体体重相对生殖力FW在270～891（粒g-1）之间，平均为479(粒g-1)；其个体绝对生殖力（F）和体长相对生殖力（FL）均与体长、体质量、净体质量、成熟系数、性腺重和年龄等呈显著相关，而二者与肥满度的相关性不大；体重相对生殖力（FW）与成熟系数、性腺重和年龄呈显著相关，与其他形态学指标相关性不大．

STUDY ON THE INDIVIDUAL FECUNDITY OF XENOCYPRIS DAVIDI BLEEKER IN THE BEIJIANG RIVER

The individual fecundity of Xenocypris davidi Bleeker in the Beijiang River and the relationship between the individual fecundity and the biological indexes were studied. The results are summarized as follows. The individual absolute fecundity of Xenocypris davidi with the net weight of 100.8～330.5g and length of 18.2～26.1 cm varies from 35 707～191 917 (average 101 038) eggs. The individual relative fecundity FL ranges from 1 962～7 719 (average 4379) eggs/ cm, and FW ranges from 270～891( average 479) eggs/ g. The individual absolute fecundity F and the relative fecundity FL of body length are significantly correlated to body length, body weight, net body weight, maturity, ovary weight and age. Both the individual absolute fecundity F and the individual relative fecundity FL have no obvious relationship with fullness. The relative fecundity FW of body weight is not significantly correlated to these biological indexes except for maturity, ovary weight and age.