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頁籤選單縮合
| 題 名 | 日本鰻Anguilla Japonica生殖腺發育及人工催熟之研究 |
|---|---|
| 作 者 | 賴仲義; 張湧泉; 陳冠如; 余廷基; | 書刊名 | 水產研究 |
| 卷 期 | 3:2 1995.12[民84.12] |
| 頁 次 | 頁143-149 |
| 分類號 | 388.491 |
| 關鍵詞 | 日本鰻; 鹽度; 性腺發育; 人工催熟; Anguilla japonica; Salinity; Gonadal development; Induced maturation; |
| 語 文 | 中文(Chinese) |
| 中文摘要 | 日本鰻 Anguilla japonica 在淡水池養殖3年後,第4年分別養在淡水 或鹹水池中。第4年之養殖期間,按月逢機取樣6尾。計採144尾標本魚中, 性別比例雌鰻為75.00%,雄鰻22.22%,未能分辨性別者佔2.78%。全長 70?79 cm 或體重大於(含) 800 g時,雌鰻之出現率最高;全長50?59 cm或體重介於 300?399 g時,雄鰻之出現率最高。雌鰻在鹹水養殖環境中,其肥滿度與水溫 呈正相關 (p<0.05),但在淡水養殖環境中則兩者呈不相關 (p>0.05)。不論是在 淡水或鹹水養殖環境,雌鰻之生殖腺成熟指數 (GSI) 與水溫均成負相關 (淡水 組: r=-0.88, p<0.05; 鹹水組: r=-0.59, p<0.05)。12月份低水溫期,鹹水養殖雌鰻 GSI之平均值最高,其值為 1.65±0.60;而在高水溫期之8月,平均GSI 值最 低,僅為0.72±0.10。自10及11月份起,各取鹹水組之雌鰻40尾,在相似之 條件下,以同劑量之催熟激素誘導雌鰻成熟結果發現,可使其體重增至初體重 之120% 以上且達成熟體型。自11月份開始催熟之雌鰻所需之催熟次數比自10 月份開始者少,顯示池中養殖之鰻魚在11月份時,其生殖腺比10月份有更進 一步之發育。 |
| 英文摘要 | Japanese eels Anguilla japonica, after cultured in fresh-water ponds for three years, were stocked in fresh-water or salt-water ponds for one more year. During the last year, eels were sampled monthly from each pond to check and analyze their maturity value. The sex percentages of eels were 75.00% of females and 22.22% of males (3.38:1), 2.78% couldn't be differentiated. Eels with body length of 70 to 79 cm or body weight of more than 800 g were mostly female. Those with body length of 50 to 59 cm or body weight of 300 to 399 g were mostly male. The condition factor of female eels stocked in salt-water pond was with positive correlation to water temperature (p<0.05), while those stocked in fresh-water ponds showed no correlation (p>0.05). The GSI of female eels, whether stocked in fresh-water or salt-water pond, was with negative correlation to water temperature (p<0.05). In December, female eels stocked in salt-water pond with low water temperature had the highest average value of GSI (1.65±0.60). The average GSI was lowest (0.70±0.10) in August with high temperature. Female eels stocked in salt-water pond were sampled (40 for each group) and injected with the same quantity of hormones from October or November, respectively, to induce maturity. The results showed that body weight of both groups could increase to 120% initial weight. Yet injection times needed for female eels induced from November was less than that from October, demonstrated that gonads of female eels in November developed further than in October. |
本系統中英文摘要資訊取自各篇刊載內容。