Study on the individual fecundity of Octopus tankahkeei

On the basis of biological data obtained from the speciemens of Octopus tankahkeei from the Xiangshan Bay,Zhejiang Province in China in 2004,the distribution,variant regularity and relationship with body character indexes of individual fecundity were studied.the results were summarized as follows:The individual absolute fecundity r and relative fecundity r/L,r/W,r/V are all distributed normal y.The individual absolute fecundity r and relative fecundity r/W can be expressed in power functions by the major body character indexes except the D,W G and W F,which are S-shaped,linearly and quadraticly correlative to the absolute fecundity r.the relative fecundity r/W are cubticly correlative to the character indexes by W_L and W_G.while the individual relative fecundity r/V has compound regression relationship with these body character indexes,but the individual relative fecundity r/L has no significant relationship with these indexes.The optimun multiple regression of the individual fecundity(r,r/W,r/V) with the body character indexes are described,they show thatr is mainly dependent on the size of D_K.