ケフサイソガニの個体群構造の季節的変化について
SEASONAL VARIATION OF POPULATION STRUCTURE OF HEMIGRAPSUS PENICILLATUS (DE HAAN) (CRUSTACEA : BRACHYURA)

Kazutoshi OKAMOTO, Yasushi KURIHARA
1987 Nihon Seitai Gakkaishi  
Biologieat 傭 "翩 θ ,」 9acu 妙 { ゾ Seience ,7b加 ku UniレersitPt , Sendai 980 Sy皿op 戯s The life cycle of a grapsid crab Hemigrapsus peniciliatus i ロ habiting the intertidal bou1 − der shore was hwestigated in the Gam δ 、 Estuary over a two − year period using stoncrfilled basket traps. Ovigerous females occurred from June to September , withl the maxlmum 士 ・ atio to the total number of ad ロlts being present from August to September . Megalopae larvae settlcd intensively in Septenlber . It was est
more » ... ber . It was est ated that ouly O . ユ7 % of the eggs produced 血 the popu 王 atioll developed as far as juveniles of O. 3 cm carapace width . By early December these had reached O. 6 cm width . Little further growth was evident til March , but by the 飼 10wing December individuals had reached 2, 0 cm . Mature size was reached 10 − 11 months after ・ ettlem ・nt ・ Lif ・ t・b1・ a・ ・ly・ i・ ・f thi ・ P ・P ・lat 圭 。... ggest・d a 2 − yea ・ Ur・ ・ pan with tw ・ overlapPing cohorts ,
doi:10.18960/seitai.37.2_81 fatcat:yykdcvogwngmvbyqqe4kcpftli