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題名 | 不同養殖密度及投餵Estradiol-17 β與否與歐洲鰻之成長及性腺發育之關係=Relationship of Different Stocking Densities and Estradiol-17 β on the Growth and Gonadal Development of European Eel Anguilla Anguilla |
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作者 | 徐崇仁; 周賢鏘; 許慧文; 廖一久; Shyu, Chung-zen; Chou, Shiarn-chiang; Hsu, Hui-wen; Liao, I Chiu; |
期刊 | 水產研究 |
出版日期 | 19970600 |
卷期 | 5:1 1997.06[民86.06] |
頁次 | 頁21-29 |
分類號 | 439.5 |
語文 | chi |
關鍵詞 | 歐洲鰻; Anguilla anguilla; Estradiol-17 β; |
中文摘要 | 養殖歐洲鰻使用雌二醇Estradiol-17β(E2)等荷爾蒙之試驗研究,大都僅限於促進幼鰻成長的短期試驗。本研究以平均體重 3.1 ± 1.1 g 之歐洲鰻放養於超集約循環水養殖系統中, 分三組進行試驗:即高密度(22.5 kg╱m�插^+ E2(60 mg╱kg飼料)組,高密度(22.5 kg╱m�插^組及低密度(7.5 kg╱m�插^組,試驗分六個階段進行,共計482日。在第312日採樣後,各別於2週內分別注射HCG(1 IU╱g)2次後,檢測其性腺之發育情形,結果發現,在前期(分組處理後62日),低密度組之成長速率顯著大於高密度組或高密度+E2組,直至20-30公克╱尾。嗣後,高密度+E2組之成長趕上並於後期超過其化二組,而其性腺指數亦顯著高於其他二組者。 |
英文摘要 | Most of the studies aimed at increasing the growth rate of the eels using hormone treatments were on juvenile eels. In this study, European eels with an average weight of 3.1 ± 1.1g were stocked in a superintensive recirculating aquaculture system in 3 treatment groups, i.e. groups of high stocking density (22.5 kg/m��) with or without estradiol-17β (60 mg/kg feed) and a low density (7.5 kg/m��) group. The experiment was divided into 6 periods, having total of 482 days. After 312 days of feeding trial, samples from the 3 groups were injected with HCG (1 IU/g) twice in two weeks and gonads were investigated. Eels in the low density group grew faster than eels in the high density group with or without E2 treatment in the previous period (62 days after treatment) until about 20-30 g each. Then individuals in the high density group with E2 caught up and grew faster compared with the other two groups in the remaining period. The GSI of eels in the high density group with E2 was significantly higher than the GSI of the eels in the other two groups. |
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