Effects of Highly Unsaturated Fatty Acids in Broodstock Diets on Spawning and Egg Quality of Black Porgy(Acanthopagrus Schlegeli)

高度不飽和脂肪酸對黑鯛種魚之產卵與卵質的影響

周昱翰(Yu-Han Chou) ； 劉擎華(Chyng-Hwa Liou) ； 林先釧(Shian-Chuann Lin) ； 吳純衡(Chwen-Herng Wu)

《臺灣水產學會刊》 20卷2期 (1993/06) Pp. 167-176

https://doi.org/10.29822/JFST.199306.0008

摘要

為究明箱網在流水中的網內流速及形狀之變化，採用流速計在移動中連續讀取網內流速的方法進行水槽實驗。在同一流速下，箱網之網內平均流速及容積皆隨D／L之增大而變小。而同一D／L箱網，其網內流速在低流速時，隨著水槽流速之增加而增大；水槽流速在大到某一程度後反而逐漸下降。箱網容積隨流速之增大而減小。以D／L=0.1之實際箱網為例，流速在0.4 m／s以上，箱網之容積則減少至原來之6成以下。

關鍵字

種魚飼料 ； 高度不飽和脂肪酸 ； 產卵 ； 卵質 ； 黑鯛

並列摘要

The changes of flow velocity and pattern under the force of current wereexamined in this present study once a netting cage had been installed in anexperimental water channel.The inner average velocity and volume for the same flow velocity wereobserved to decrease as the D/L increased.However,with the same D/L ofnetting cage,the inner flow velocity was observed to increase under a lowflow velocity as flow velocity increased.That is,the inner flow velocity wouldcontrarily decrease gradually;once flow velocity reached a certain maximumdegree.Meanwhile,the volume tended to decrease as the flow velocity wasincreasing.Taking a netting cage of D/L=0.1 for instance the flow velocityof the octval netting cage is larger than 0.4 m/s the volume would decrease toless than 60% of the original volume.

並列關鍵字

Broodstock Diet ； Highly Unsaturated Fatty Acids ； Egg Quality ； Spawning ； Black progy