周防灘産マコガレイの成熟と産卵期

DOI 日本農学文献記事索引 Web Site 被引用文献2件

書誌事項

タイトル別名
  • Sexual maturity and spawning season of Japanese flounder in Suo-Nada.
  • スオウナダサン マコガレイ ノ セイジュク ト サンランキ

この論文をさがす

抄録

Since 1972, the catch of flatfish in Suõ-Nada decreased dramatically, and the catch in 1984 was only 52% of that in 1972.<br> This paper presents the biological parameters for stock assessment for Japanese flounder in Suõ-Nada, that is, age and body length at sexual maturity, main spawning season, maturity rate by age, and evaluation of the degree of sexual maturity which were mainly based on the data from 1980 to 1985.<br> The combination of maturity factor [103×gonad weight(g)/body weight without internal organs(g)] and observation of gonads by the naked eye can be applied to expedient judgement of sexual maturity for a large number of specimens. Maturity factor and mean body length at 50% sexual maturity were 10.0 in both sexes and 13.5cm in females and 12.0cm in males, respectively.The peak of the spawning season was the middle of December. The mean maturity rate was as follows:at age 0, 1, 2, over 3 years, it was 20, 70, 90, 100% for females and 20, 95, 95, 100% for males.

収録刊行物

  • 日本水産学会誌

    日本水産学会誌 53 (7), 1181-1190, 1987

    公益社団法人 日本水産学会

被引用文献 (2)*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