イセエビ(Panulirus japonicus(V.Siebold)の産卵回数に関する観察

概要

論文の詳細を見る
Pregnant animals, numbering 61 in four groups, were collected and kept in aquaria at Kominato Marine Biological Laboratory, Chiba Prefecture, each group in different date of collection (Fig. 2). The material tested are shown in Table I. In Kominato Bay the lobster spawned from middle June to August with peak season at mid-July in 1947 (Fig. 1). In the experiment it was found, 1) the days elapsed between collection and hatching of larval animals shortened with the months (Fig. 2 and Table 2). 2) among 61 animals observed, four femals had the another brood, after the preceding brood hatched out. The number of eggs in the second brood was, in average, smaller than first (Table 3).
社団法人日本水産学会の論文