福井県北部沿岸の底生性魚類 : I. 種組成, 体長-体重関係, 卵巣の成熟状態

1983年10月28、29日に福井県沿岸において魚類を採集し、得られた標本を調査して次の結果を得た。(1)採集できた魚類は16種166尾で、それらのうちのクロエリギンポが福井県沿岸で採集されたのは初めてであり、かつ本邦における最北の記録である。(2)比較的多数採集されたアラメガレイとササウシノシタの体長(Lmm)と体重(Wg)との関係はそれぞれ、W=1.96×10^-5 L^2.99、W=3.69×10^-5 L^2.74であった。(3)アラメガレイ、ダルマガレイおよびササウシノシタの卵巣について調査した結果、従来アラメガレイは福井県沿岸に近い若狭湾頭部では春に産卵することが明らかにされていたが、今回の調査で秋にも産卵することが確認された。他の2種は、生殖腺指数も小さく卵巣は未熟の状態であった。

The survey on fish in the waters in the northern coast of Fukui Prefecture was carried out by the Toyoshio-maru, the training vessel of the Fuculty of Applied Biological Science, Hiroshima University, on October 28 th and 29 th in 1983. Examination of fish caught resulted in the following. A total of 166 fishes were identified to the 16 species. In these spesies, the discovery of Trichonotus filamentosus was the first record in the more northern coastal waters of Tottori Pref., in the Sea of Japan. Relationships between body length(L mm) and body weight(W g) for Tarpilops oligolepis and Heteromycleris japonicus, both oil which were caught comparatively in larger numbers tl.lan the others, were given as W=1.96 X 10^-5 L^2.99 and W=3.69 X 10^-5 L^2.74 severally. It has been reported that T. oligolepis spwans "in spring" in the waters around Fukui Pref. However, the specimens of this study revealed that this species spawns also "in autumn", because females of this species had ripe eggs with high values in gonad index. Both females of Engyprosopon grandisqttama and H. japonicus had immature gonads and low values in gonad index.