Maturity classification and group maturity of the red sea bream Pagrus major - II. Male maturity

S. Matsuura, M. Matsuyama, Y. Ouchi, T. Hidaka

研究成果: Contribution to journalArticle査読

11 被引用数 (Scopus)

抄録

The criteria of testicular maturity during the spawning season and maturity rates according to age are described for male red sea bream Pagrus major collected from the Chikuzenkai between April and June, 1984. The degree of maturity of the testis is categorized into four stages on the basis of the results of a histological survey. The testicular maturity rates in fish aged 2, 3, 4 and 5 years were shown to be 18.7, 64.4, 80.0 and 100%, respectively. The fork length at which 50% of the fish attained maturity ranged from 280 to 300 mm. The weight and gonadosomatic index (GSI) value of the mature testis tended to increase with age and size. It was indicated that the sex ratio of mature red sea bream in the Chikuzenkai is probably 1:1 and that both sexes have a similar size composition at maturity.

本文言語英語
ページ(範囲)169-172
ページ数4
ジャーナルMarine Biology
96
2
DOI
出版ステータス出版済み - 10 1987

All Science Journal Classification (ASJC) codes

  • 生態、進化、行動および分類学
  • 生態学
  • 水圏科学

フィンガープリント

「Maturity classification and group maturity of the red sea bream Pagrus major - II. Male maturity」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル