流れ藻の標識放流によりモジャコ漁獲率を推定する場合の数学的モデルについての若干の検討

抄録

The basic model for the number of tags N presented in the previous paper is modified, in order to take into account the fact that tags shed from seaweeds are not vulnerable to the fishery, and hence the coefficient of fishing _κF can be applied only to retained tags N_T, but not to the total tags N. The results from a modified model are compared with those from the previous one. It reveals that the results from the latter, which is very simple in expression, is a good approximation to that from the former and the error involved in the estimate of the coefficient of tag shedding M based on the previous model is thought to be negligible. This modification of the model does not affect the estimates of other parameters such as _κF.