Seasonal Dynamics of the Density of the Crab Larvae
(Decapoda: Brachyura et Anomura) in Minonosok Bay
of Poseta Bay (Peter the Great Bay, Sea of Japan)

N. I. Grigoryeva

Zhirmunsky Institute of Marine Biology, Far East Branch, Russian Academy of Sciences, Vladivostok, Russia

e-mail: grygoryeva04@mail.ru

Received September 19, 2011; in final form, June 4, 2012

Abstract—As the materials for this project, we used data on the distribution of the larvae of the Asian paddle
crab Charybdis japonicus (A. Milne-Edwards, 1861); the spider crabs Hyas coarctatus ursinus (=Hyas ursinus)
(Rathbun, 1924), Pugettia quadridens (de Haan, 1839), and Pisoides bidentatus (H. Milne-Edwards, 1873); the
samurai crab Paradorippe granulata (=Dorippe granulata) (de Haan, 1841); the pea crab Pinnixa rathbuni
(Sakai, 1934); and the porcelain crab Pachycheles stevensii (Stimpson, 1858) in Minonosok Bay of Pos’eta Bay
obtained during 2000–2002 and in 2004. The planktonic samples were collected from the last third of May to
September. The greatest density of the larvae was observed in May, mid-June, late June–early July, and late
July–early August. The greatest densities of the crab larvae and the decapod larvae ranged from 20.4 to 48.2
and from 88.4 to 245.3 specimens/m³. The schedule of the crab larvae’s occurrence in the plankton is provided
for the first time. The distribution of the density showed pronounced patchiness.

DOI: 10.1134/S0001437013020033

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