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Larval Stages of the Blue Swimmer Crab, Portunus Pelagicus (Linnaeus, 1758) (Decapoda, Brachyura)

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Larvae of Portunus pelagicus (Linnaeus, 1758) were reared in the laboratory on hatching from wild ovigerous females collected from Palk Bay, southeast India. The larval stages included four zoeal stages and one megalopa. The megalopa moulted to the first crab instar. The zoeae and megalopa were very similar to those of other portunids. The duration of each of the first two zoeal stages was 3-4 days, the following two stages 2-3 days, and the megalopa 3-5 days, reaching the first crab stage in 15-17 days. All zoeal and megalopal stages are described in detail and are documented with illustrations. Des larves de Portunus pelagicus (Linnaeus, 1758) ont été élevées au laboratoire, provenant de femelles ovigères sauvages collectées à Palk Bay, au sud-est de l'Inde. Les stades larvaires comprenaient quatre stades zoés et un stade mégalope. La mégalope a mué en un premier stade crabe. Les stades zoés et le stade mégalope étaient très similaires à ceux des autres Portunidae. La durée de chacun des deux premiers stades zoés était de 3-4 jours, les deux stades suivantes de 2-3 jours, et le stade mégalope de 3-5 jours, atteignant le premier stade crabe en 15-17 jours. Tous les stades zoés et mégalopes sont décrits en détail et illustrés.


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