Abstract：The spotted seals Phoca largha kept in Dalian Sun Asia Tourism Holding Co .,Ltd .were examined to get their body measurements parameters including gender ,age ,body mass and body length , for the purpose of animals’ scientific feeding .Analysis of grow th curve ,body mass-length relationship and male-female growth deviation were then conducted using software SPSS 13 .0 .Data of 30 individuals were got ,including 11 females and 19 males .Results showed that the asymptotic values of the curves describing body length and mass were 167 cm ,170 cm and 171 cm ,and 153 kg ,175 kg and 191 kg ,using logistic , Gompertz and von Bertalanffy model ,respectively .The relationship of body mass-length is derived as m=44 .02L0 .258 (r2 = 0 .908) by regression analysis .Results also showed that the relationship models of body length-age and body mass-length can both describe the grow th curve accurately ,but the model of body mass-agebe poor accurate .No differential growth was found between males and females by age control covariance analysis (body length :P>0 .05 ;body mass :P>0 .05) .
