[Individual fecundity of Culter alburnus in Xujiahe Reservoir of China].

In April - June 2008, the matured female Culter alburnus specimens were collected from the Xujiahe Reservoir of China. Their ages were identified by the scales, and their body length, body mass, gonad mass, and other morphological indices were measured. Counted with gravimetric method, the individual absolute fecundity was obtained, and used for calculating the relative fecundity per centimetre, relative fecundity per gram, maturity, relative fatness, and other indices. Based on these measurements and calculations, the relationships between the individual fecundity and the morphological indices of C. alburnus in the Reservoir were studied. The ages of the specimens ranged from 2+ to 5+ years old, and the individual absolute fecundity and relative fecundity per centimetre were exponentially correlated with body length and body mass, and linearly correlated with age. No significant correlations were observed between the relative fecundity per gram and these morphological indices. Multi-regressive analyses showed that the individual absolute fecundity was significantly correlated with body mass and gonad mass, the relative fecundity per centimetre was significantly correlated with gonad mass, relative fatness and maturity, while the relative fecundity per gram was only correlated with maturity.