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題名 | 白鰻誘導繁殖試驗= |
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作者 | 余廷基; 蔡中利; 蔡永舜; 賴仲義; |
期刊 | 水產研究 |
出版日期 | 19930600 |
卷期 | 1:1 1993.06[民82.06] |
頁次 | 頁27-34 |
分類號 | 439.5 |
語文 | chi |
關鍵詞 | 白鰻; 自行產卵; Anguilla japonica; Spontaneous spawning; |
中文摘要 | 雌鰻以人工合成荷爾蒙注射催熟,於6 針次左右達性成熟後,再依原 注射量加倍之劑量催生 (誘導產卵) ,10小時後可自行產卵或人工採卵。受精 卵在水溫19.5℃、鹽度35 ppt環境下,約經48 h孵出仔鰻。孵出之仔鰻全長為 2.89 mm,軀體稍呈彎曲,1日後全長為2.94 mm,4 日後全長為5.24 mm並發 生大量死亡。12日後全長為7.82 mm,顎齒向外突出。17日後全長為11.12 mm, 顎齒萎縮並發生死亡。25日後全長為19.2 mm,仔鰻全部死亡。 |
英文摘要 | Japanese eel (Anguilla japonica) were treated with mixed gonadotropin. The female reached mature stage after the sixth injection. Ten hours after another injection with double dosage, some female spawned spontaneously or were stripped successfully. Under 19.5℃ and 35 ppt, the fertilized eggs hatched after about 48 hours. Average total length of newly hatched fry was 2.89 mm with body slightly bent. The total length of one day old fry increased to 2.94 mm. On the fourth day, the average total length of fry was 5.24 mm and mass mortality was occurred. The total length of the 12-day old fry reached 7.82 mm with jaw teeth extruded. Average total length of 17-day old fry was 11.12 mm with atrophy of jaw teeth. High mortality occurred again. All fry died after 25 days. The total length was 19.2 mm. |
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