農業部水產試驗所全球資訊網

本研究針對三種立體箱網在室內養殖白蝦的活存與成長加以比較。放養密度為64尾/米平方，共計養殖57天，鹽分維持在25 ppt，水溫29.1-31.6°C，最初体型為0.15公克。同體積二、三及六層箱網養殖白蝦的結果以六層箱網最佳。結果顯示六層箱網在水體的充分利用上較優，其總產量為三層箱網及二層箱網的1.3倍及2.4倍。六層箱網的各層平均活存率為75.9%，三層箱網者為73.4%，二層箱網者為80.5，統計上無差異(p > 0.05)，收成的體型三者間亦無差異(p > 0.05)，但大型蝦的百分比以六層箱網者為最高。餌料係數在本研究的結果低於0.5, 此值得注目的結果在文中有詳加討論。

摘要abstract(英) This study was conducted to compare the survival and growth of white leg shrimp, Litopenaeus vanname, cultured in three types of indoor multi-layer net cages, namely double-, triple-, and hexa- net cages of the same volume. Total rearing duration was 57 days, with an initial density of 64/m² for each layer. Salinity and water temperature were maintained at 25 ± 1 ppt and 29.1-31.6°C, respectively. The initial body weight of the shrimp was 0.15 g. Results indicated that the hexa-layer net cage was the best for spatial usage of the entire volume of water, with a total production 1.33 and 2.44 times that of the triple- and double-layer ones, separately. The average survival rates of each layer in the hexa- (75.9%), triple- (73.4%), and double-layer (80.5%) net cages did not significantly differ (p > 0.05). There were no differences in harvest size among the three treatments, either. However, the proportion of large-sized shrimp was highest in the hexa-layer cage among the three types of cages. The feed conversion ratio was less than 0.5, and the reasons for this notable result are also discussed.