台湾で採集されたシラスウナギの日令と孵化日

DOI 日本農学文献記事索引 Web Site 被引用文献5件

書誌事項

タイトル別名
  • Age and birth date of the glass eel, Anguilla japonica, collected in Taiwan.
  • 台湾で採集されたシラスウナギの日令と孵化日〔英文〕
  • タイワン デ サイシュウサレタ シラスウナギ ノ ニチレイ ト フカニチ エイ

この論文をさがす

抄録

Forty glass eels, Anguilla japonica, collected at the Giese shore and the Tanshui River mouth in Taiwan were aged with the otolith daily increments, and their birth dates were analyzed. The mean radius of sagitta was 153μm, and the mean width of increments was 1.3μm until about 50 days and 1.7μm during 50-90days. The mean age of the fish collected on January 3 was estimat-ed as 122d while that of March 9 sample was 120d. There were no significant differences in age and body length between the two samples The mean birth date of the January 3 samples was September 2, while that of the March 9 samples was November 9 of the previous year. They were significantly different, suggesting that fish born earlier in the spawning place migrated earlier to Taiwan with constant age and size. Spawning season of the Japanese eel might be summer-autumn contrary to the previous understanding (winter), and the time required for oceanic migra-tion would be only 4 months.

収録刊行物

  • 日本水産学会誌

    日本水産学会誌 56 (8), 1199-1202, 1990

    公益社団法人 日本水産学会

被引用文献 (5)*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