相模湾平塚沖の貝類相：2010年夏の調査結果

概要

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Mollusks and bottom sediment were simultaneously collected by dredging Sagami Bay off Hiratsuka at depths of 3 to 43 m. One hundred thirty five specimens belonging to 30 species were obtained: 12 species of gastropods, 2 species of scaphopods, 15 species of bivalves and 1 species of cephalopods. All were warm-water species, 23 of which are known only from Japan and 6 of which are distributed from Japan to equatorial regions. The seafloor with fine-grained sand around 3 m deep was exclusively occupied by Umbonium giganteum. The bottom sediment around 10 m deep was fine-grained sand in which Veremolpa micra and Nitidorellina minuta were dominant. The substrate from 22 to 23 m deep was composed of very fine- to fine-grained sand with pebbles, from which a variety of bivalves, not only burrowing but also sessile ones, were found. From 30 m deep the substrate gradually includes mud and in muddy very fine-grained sand Glycymeris imperialis and Episiphon suberctum are dominant accompaniedby different kinds of gastropods.
神奈川大学総合理学研究所の論文
2011-06-30