Zoeal Stages and Megalopa of Hemigrapsus penicillagtus(De Haan, 1835) (Decapoda, BRachyura, Grapsidae) Reared in the Laboratory)

풀게 Hemigrapsus penicillatus(게아목, 바위게과)의 zoea 및 megalopa 유생기

  • Published : 1995.09.01

Abstract

The complete larval development of Hemigrapsus penicillatus(De Haan, 1835) from hatching to first crab stage was obtained by culture in the laboratory. Under culture conditions with salinity 33.3% , temperature $25^{\circ}C$, and photophase 14/10 h light/dark, the megalopa and the first crab instar were attained in minimum of 18 and 29 days after hatching respectively. Five zoeal stages and a megalopal stage are described and illustrated in detail. Morphological characters of H. penicillatus larvae were compared with those of other members within the subfamily Varuninae. Morphological differences among H. penicillatus, H. sanguineus and H. sinensis in megalopal stage are tabulated.