頁籤選單縮合
題名 | 橡膠製品業= |
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作者 | |
期刊 | 彰銀資料 |
出版日期 | 19990500 |
卷期 | 48:5 1999.05[民88.05] |
頁次 | 頁91-95 |
分類號 | 485.31 |
語文 | chi |
關鍵詞 | 橡膠製品業; |
中文摘要 | 本實驗主在調查鹽度對黑鯛卵發育的影響。我們在黑鯛受精卵發育至不同發生期 時,將其移到不鹽度的海水中。經由孵化時間(僅量初桑椹胚期之卵)、總孵化率及正常孵化 率的比較來了解鹽度對卵發育的影響。結果顯示,大致上卵孵化時會隨鹽度增加而縮短。總 孵化率方面,在低鹽度如5及10ppt下,發生較晚期才較移的卵通常比較前期較移的卵有較 高的總孵化率,不過除了在眼胞期較移的卵外,大部份的卵在如此低的鹽度下的正常孵化率 都相當低。因此,要得到高正常孵化率所需的鹽度範圍顯然要比得到高總孵化率所需的鹽度 範圍來得狹窄。在原腸中期的卵對鹽度變化的敏感性是六組中最高,要得到70%以上正常孵 化率的鹽度範圍僅在20至30ppt之間。 |
英文摘要 | This study is to investigate the effects of salinity on egg development of black porgy, Acanthopagrus schlegeli. Fertilized eggs were initially incubated in 35 ppt sea water. Then, embryos from each of six development stages were putted in sea water with salinities ranging from 5 to 45 ppt until the became larvae. The hatching time (only in the eggs at early morula stage), total hatching rate and normal hatching rate were recorded to determine the effect of salinity on eggs generally decreased with increasing salinity. Under low salinity (<15 ppt),embryos transferred at early stages. Moreover, most embryos had low viability under low salinity, except for those transferred at optical vesicle formation stage. The salinity range was stricter for high viable hatching rate that for high total hatching rate. Embryos from middle gastrula stage were most sensitive to salinity shift. The had normal hatching rate higher that 70% only under the salinity of 20-30 ppt. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。