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標題: 如何鑒別虹鱒魚的雌雄? [打印本頁]
作者: jieming    時間: 2011-4-26 15:22
標題: 如何鑒別虹鱒魚的雌雄?
本帖最后由 jieming 于 2011-4-26 15:22 編輯

　　虹鱒魚雌雄的鑒別，主要依據體色、頭部及吻端加以區別。體色深，頭部及口大，下頜向上彎曲呈鉤狀，蓋住上頜，背部略隆起，腹部硬、無彈性，泄殖孔不突出，吻端尖者為雄性魚。體色較雄魚淺，頭部及口小，上、下頜等長，背部不隆起，腹部大而柔軟，有彈性，生殖孔明顯突出，吻端鈍而圓者為雌性魚。?




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