若狭湾西部海域におけるカタクチイワシ卵・稚仔魚の鉛直分布の昼夜変化

DOI 日本農学文献記事索引 Web Site 被引用文献6件

書誌事項

タイトル別名
  • Diurnal changes in vertical distributions of anchovy eggs and larvae in the western Wakasa Bay.
  • 若狭湾西部海域におけるカタクチイワシ卵・稚子魚の鉛直分布の昼夜変化
  • ワカサワン セイブ カイイキ ニ オケル カタクチイワシ ラン チシギョ ノ

この論文をさがす

抄録

Diurnal Changes in Vertical Distributions of Anchovy Engraulis japonica eggs and larvae were studied, in connection with feeding habits of the larvae, in the western Wakasa Bay, Japan Sea, in July and August 1982.<br> Eggs of the earliest stage of development are found in abundance in the water of about 50m depty. rising up to 0-25m depth and sinking down to about 50m depth during the late stage fo development. While the larvae of less than 4mm BL are confined to waters between 25m and 50 m depth all day, diurnal vertical migration of rather large larvae occur. Namely, the larvae fo more than 6mm BL are present in surface waters in daytime, but by night move downward to about 25m depth.<br> Main food components of 5-7 mm larvae are copepod nauplii and copepodites, while Paracalanus parvus and Oithona spp. form the principal food for the larvae fo more than 7mm BL.<br> As the feeding time of anchovy larvae is estimated as daytime and the larvae of more than 7 mm BL have a well expanded gas bladder, it seems possible that the diurnal vertical migration is due to theri feeding habits and functions of gas bladder, developing into active feeding migration as larval growth procceeds.

収録刊行物

  • 日本水産学会誌

    日本水産学会誌 50 (8), 1285-1292, 1984

    公益社団法人 日本水産学会

被引用文献 (6)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ