The species composition, period of occurrence, density, and distribution of brachyuran crab larvae (Decapoda: Brachyura) in the Amursky and Ussuriysky bays (Sea of Japan) were studied in May–October 2007 and 2008. The larvae of this group were not numerous, with peak densities occurring in July at maximum water temperatures. The average brachyuran larvae density was up to 126.9 ind./m3 in Ussuriysky Bay and 68 ind./m3 in Amursky Bay; the contribution of Brachyura to all decapod larvae reached 80–90%. In Amursky Bay, the highest density of brachyuran larvae (up to 584 ind./m3) was observed along the western coast over depths to 20 m; in Ussuriysky Bay, the larval density was highest (up to 1817 ind./m3) in the shallowwater northern part and progressively decreased with depth. Larvae of 18 brachyuran species were found in plankton samples. In Amursky Bay, intertidal crab larvae of the genus Hemigrapsus dominated, Eriocheir japonica larvae were fairly numerous. Larvae of the pea crabs Pinnixa rathbuni and Tritodynamia rathbunae and zoeae of the bigtooth rock crab Glebocarcinus amphioetus were predominant in Ussuriysky Bay.
Russian Journal of Marine Biology – Springer Journals
Published: Jan 5, 2014
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