小田和湾の藻場におけるウミタナゴ類3種の生息場所および分布

概要

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1) Distribution and movement of embiotocid fishes around Odawa Bay, Kanagawa Prefecture, are examined on the basis of regular sampling of the tow net at fixed stations in the bay. 2) Regression analyses of the body depth on the body length show a clear difference between species and the classification of Embiotocidae proposed by ABE is adopted here. 3) Gravid females of three species of embiotocid fishes enter into the mouth area of the bay in February or March and juveniles of D. viridis and D. temmincki are born in the Zostera belt of the bay. After birth in May, juveniles and young gradually gather in the nursery ground around the Zostera belt in the inner parts of the bay. 4) Their habitats and distribution pattern of each species are somewhat different. D. viridis appears to be most closely related with the Zostera belt while N. ransonneti tends to stay in the mouth area of the bay for a relatively short period of time. 5) The habitats of females of these three species seem to be separated from males in the reproductive season and only gravid females tend to use the Zostera belt to find a suitable palce for the birth of young ones.
日本水産學會の論文