相模灘西部浅海産カニ類

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As a part of the project entitled the Natural History Researches of the Japanese Islands by the National Science Museum, Tokyo, the benthic animals were collected by dredging at shallow water off Shimoda, southern part of the Izu Peninsula, central Japan. The crabs collected were identified as 43 species of 39 genera, many of which were represented by juveniles, as shown in Table 2. The shallow-water crab fauna off east coast of the Izu Peninsula (=western part of Sagami Bay and Sagami Sea) were compared with that off west coast of the Miura Peninsula (=eastern part of Sagami Bay). The species known from Sagami Bay and Sagami Sea are 332 in all, of which 224 are recorded from the western part of Sagami Bay and Sagami Sea, and 289 are from the eastern part (Table 2). The rich fauna in the eastern part is depicted probably by sampling effort made by the late Emperor Showa (Emperor Hirohito) and also sampling site at the offshore banks. In spite of this fact, some southern species such as Frodromia atypica (Dromiidae), Calappa calappa (Calappidae), Pseudolambrus tuberculatus (Parthenopidae), and Charybdis amboinensis, Lissocarcinus polybioides, Lupocyclus philippinensis, Portunus longispinosus and Thalamita parvidens (Portunidae) are unrecorded from the eastern part. This may be reasonable, because the branch of the Kuroshio Current flows into Sagami Bay along east coast of the Izu Peninsula making the geographical northernmost barrier for these southern species.
国立科学博物館の論文
2002-12-25

相模灘西部浅海産カニ類

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