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海鱺生殖調控對養殖之應用研究

  • 日期:106-03-24
  • 計畫編號:106農科-10.3.3-水-A1(6)
  • 年度:2017
  • 領域:漁業科技研發
  • 主持人:李彥宏
  • 研究人員:張銀戀

單一性別魚類養殖對產業有極大幫助,能增加養殖效益及產業利益,因此本計畫以 海鱺作為試驗魚種,進行性別控制之研究,達到增加產業效益的目標。目前養殖雄 性化海鱺7尾,平均體重5.34±0.61公斤,透過埋植含有800μg LHRH-a2之 pellet,增加產精量達1.26 ml/尾。已建立每尾雄性化海鱺精液冷凍,海鱺催熟及 人工繁殖,但均無法培育出仔魚,主要原因是以1.8噸FRP桶培育魚苗,水溫過高(超 過32℃),導致水質容易惡化。目前已進行小水泥池整修,可再次進行魚苗培育,再 育苗100天,即可進行子代生殖腺性別判定,屆時才能確認雄性化海鱺種魚是否為新 雄魚。再以新雄魚為種魚,才可生產全雌化海鱺子代,推廣或技術轉移給養殖業者 ,可增加產量並降低成本,有利海鱺養殖業發展。

研究報告摘要(英)


Monosex fish culture is advantageous for fish production and industrial benefits. Therefore, the aim of this study will investigate the control of sex and feminization in cobia ( Rachycentron canadum ) for improving the industrial efficiency. At present, seven fish of cultured masculinized cobia, an average weight of 5.34 ± 0.61 kilograms, has spermiation , but the amount of sperm production is insufficient for artificial insemination. We use LHRH-a2 to enhance sperm production and the effect is significant and average semen amount was up to 1.2 ml per fish. It was enough for cryopreservation and artificial breeding . We succeeded to finish cobia artificial reproduction but failed to culture cobia larvae. We still work hard at cobia artificial reproduction and larvae rearing until 100 days post-hatching to identify the sex ratio of the offspring by gonadal histology, then to confirm the neomale cobia. These neomale fish will spawn with normal female to produce all-female progeny. These results can be applied to cobia aquaculture.