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題名 | 單一尾雌嘉鱲種魚之自然產卵及其卵質= |
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作者 | 林金榮; 涂嘉猷; 陳春暉; |
期刊 | 水產研究 |
出版日期 | 19930600 |
卷期 | 1:1 1993.06[民82.06] |
頁次 | 頁35-42 |
分類號 | 439.5 |
語文 | chi |
關鍵詞 | 嘉鱲魚; 每日產卵; 卵質; 卵之生產力; Red sea bream; Natural daily spawning; Quality of eggs; Productivity of eggs; |
中文摘要 | 6齡雌嘉臘魚一對和4齡雄種魚二尾放養於6×5×1.5 m之室內水泥池調 查單1尾雌種魚自然產卵之歷程及卵質之變動,其結果摘要如下:(一) 產卵期 間自1992年2月27日至3月26日,產卵次數18次,其中14次連續每日產卵, 確認嘉臘魚為每日產卵之多次產卵魚類;(二) 整個產卵期間共撈獲卵數 8,878,100粒,平均1次產卵數493,200粒,最高日產卵數898,000粒;(三) 受 精率98.0~100.0%,顯示種魚產卵行為正常;孵化率66.5 ~ 96.0%,以產卵中期 較高;(四) 平均卵徑0.919? 0.969 mm。卵徑和產卵前4日內之水溫均有顯著 負相關,尤以產卵前1日之水溫相關最大 (r = -0.7746, n = 16);(五) 卵的生產 力 (受精率×孵化率×卵黃囊期結束時仔魚活存率) 以產卵中期 (3月3日至3 月12日) 較高;(六) 種魚於產卵期間照常攝餌,1月3日至3月31日之飼育 期間,平均日攝餌率為體重之0.95%,平均體重卻減輕1.89%。 |
英文摘要 | A pair of 6-year-old red sea bream (Pagrus major) and two 4-year-old male were stocked in an indoor concrete tank with a dimension of 6×5×1.5m. The spawning pattern and quality of eggs of the 6-year-old female was observed in this study. It has spawned 18 times during February 27 to March 26, 1992. Of which, the spawning in the two periods of February 27 to March 5 and March 12 to March 17 were happen daily, indicating that the red sea bream was multi-spawning species and would spawn daily. The total number of eggs spawned during the entire observed period was 8,878,100, and the maximum number of eggs spawned in a day was 898,000. Fertilization rates were ranged from 98.04% to 100% and hatching rates from 66.5% to 96.0%. The highest hatching rate was observed in the middle of spawning period. Productivity of eggs (fertilization rate×hatching rate×survival rate at the end of yolk sac period of hatched larvae) was also examined herein and the result showed that the highest productivity of eggs was happened during the middle period of the spawning (March 3 - March 12). Average diameters of spawned eggs ranged from 0.919 mm to 0.969 mm. A negative correlated relationship (r = -0.7746, n = 16) was observed between the average diameters of spawned eggs and the water temperature on the day before spawning. The growth of the broodstock during the period from January 3 to March 31 was suppressed completely and the average body weight decreased an 1.89%. |
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