Reproductive biology of the dolphin fish Corphaena hippurus on the east coast of Taiwan.

• WU CHUEN-CHI

  Taiwan Fisheries Research Institute Kaohsiung Branch

• SU WEI-CHENG

  Taiwan Fisheries Research Institute Kaohsiung Branch

• KAWASAKI TSUYOSHI

  Tohoku University

抄録

The dolphin fish, Corphaena hippurus Linnaeus, is one of the most important migratory fishes on the east coast of Taiwan. Present results are based on an investigation of 1439 specimens caught using long-line and driftnet, and set net collected monthly between September 1996 and September 1997. The sex ratio of female to male and female combined was 65%, demonstrating a female predominance. Oocytes became mature and transparent when they attained 1.0 mm in diameter. The total number of oocytes per ovary was estimated to range from 2.78×10⁵ to 23.48×10⁵, but batch fecundity was noticeably lower than the total number of ovarian eggs, ranging 5.3-32.7% (average 30.1%), and the relative fecundity ranging 10-344/g bodyweight (mean 111/g bodyweight). Minimum body size at sexual maturity was estimated to be 51 cm for both sexes. Dolphin fish spawned throughout the year with reproductive activity peaking in February to March. It is suggested that the dolphin fish has an extended spawning season, during which it lays eggs almost continuously.

収録刊行物

• Ｆｉｓｈｅｒｉｅｓ　ｓｃｉｅｎｃｅ

  Ｆｉｓｈｅｒｉｅｓ　ｓｃｉｅｎｃｅ 67 (5), 784-793, 2001

  公益社団法人 日本水産学会

キーワード

• dolphin fish
• fecundity
• reproduction
• sex ratio
• spawning season

詳細情報

• CRID: 1390282679404465920
• NII論文ID: 130003742364
• NII論文ID: 10008270414
• NII書誌ID: AA10993718
• DOI: 10.1046/j.1444-2906.2001.00324.x
• ISSN: 14442906
• ISSN: 09199268
• NDL書誌ID: 5950740
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I5950740
• 本文言語コード: en
• データソース種別:
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