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題 名 | 鹽度對點帶石斑器官形成前後期胚體發育之影響 |
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作 者 | 葉信利; 朱永桐; 許晉榮; 丁雲源; | 書刊名 | 水產研究 |
卷 期 | 3:2 1995.12[民84.12] |
頁 次 | 頁133-142 |
分類號 | 387.101 |
關鍵詞 | 原腸期; 孵化前期; 器官形成; 點帶石班; Gastrula; Pre-hatching stage; Organogenesis; Epinephelus coioides; |
語 文 | 中文(Chinese) |
中文摘要 | 利用點帶石斑原腸期、孵化前期之胚體卵為對象,探討器官發育前後 胚體受鹽度刺激對孵化與魚苗產生之影響,以瞭解胚體器官形成後對鹽度變化 之忍受力與鹽度調控能否有助於胚體孵化與育苗成功率。器官發育後胚體 (孵 化前期) 在各鹽度組皆有較高總孵化率,並在低鹽 (5 ppt) 組有顯著差異,約為 器官發育前胚體 (原腸期) 之3倍;死卵率在各鹽度組胚體器官形成前胚體皆 比器官形成後胚體高,以5 ppt組為例即高達約20倍;正孵化卵率對器官形成 前後胚體並無不同,皆同樣在5 ppt組出現,約16-20%;發生之未孵化胚體卵 率則以器官形成後於鹽度5及20 ppt 之組而且皆高於器官形成前胚體。 |
英文摘要 | The objective of this study was to investigate the effects of salinity on survival, developmental, and hatching rate of the embryo before and post organogenesis (gastrula, pre-hatching stage) of the grouper Epinephelus coioides cultured in different salinity of saltwater. Salinity treatments were carried out by transferring fertilized egg from the base salinity seawater (35 ppt) into a beaker containing water with test salinity 5~45 ppt. The results indicated that salinity level 5 and 45 ppt were beyond the limits for normal embryonic development. The total hatching rate, dead egg rate and un-hatch egg rate were significantly affected by salinity 5 ppt between gastrula and pre-hatching stage. The hatch rates of pre- hatching stage were 3 times larger than gastrula, but dead egg rates of post organogenesis were 20 times less than before organogenesis at 5 ppt of salinity. The just hatching egg rate had no difference between before and post organogenesis, and their values were 16~20 % at 5 ppt salinity. The un-hatch embryo rates of pre-hatching stage were higher than gastrula at 5, 20 ppt of salinity. Gastrula embryos (before organogenesis) of this study are generally considered to be the more sensitive stages to salinity treatment than those pre- hatching stage in embryonic development. |
本系統中英文摘要資訊取自各篇刊載內容。