Larval Development of the Spider Crab Doclea gracilipes Stimpson, 1857 (Decapoda: Brachyura: Majidae) Reared in the Laboratory
1988; Oxford University Press; Volume: 8; Issue: 3 Linguagem: Inglês
10.2307/1548281
ISSN1937-240X
AutoresT. S. Krishnan, T. Kannupandi,
Tópico(s)Marine and fisheries research
ResumoABSTRACT Larvae of the majid crab Doclea gracilipes Stimpson, 1857, were reared under laboratory culture conditions with salinity 33 ± 1‰, temperature 28 ± 1°C, and photophase 12/12 h light/ dark. The first zoea molted in 2 days to second zoea which subsequently molted to megalopa in 3 days. Two zoeal stages and a megalopa stage are described and illustrated. The two zoeal stages are distinguished from those of other species of the genus by the absence of rostral spines. The megalopa can be differentiated by the presence of 4 dorsal surface spines on the carapace and the two horned rostrum. The validity of Chhapgar's (1957) identification of the planktoncaught megalopa of D. gracilipes is discussed.
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