本試驗在2 mt FRP桶中以不換水的方式進行白蝦 (Litopenaeus vannamei) 養殖，供給充分的打氣使有機顆粒懸浮於水體中。試驗共分三個部分：(1) 附著基質試驗：放置網套、網袋、掛網、珊瑚砂和無放置物的對照組；(2) 密度試驗：100、200、300和400尾/m2；(3) 不換水及少量換水 (35%池水/週) 試驗。
試驗結果，以放置網袋組有最大的白蝦產量、平均增重及最佳的飼料轉換率；網套則可隔離最多的懸浮顆粒。白蝦平均增重隨密度的增加而降低，飼養密度超過200尾/m2 則生長緩慢，以100尾/m2密度來飼養，雖可得到最大的白蝦平均增重，但以產量看來，200尾/m2 為最佳的飼養密度。不換水養殖的水質條件，僅正磷酸鹽磷的濃度明顯較少量換水組高；兩組的無機氮化合物濃度均在安全範圍內，故不換水養殖在水質方面亦可達到換水養殖的水準。此外，不換水組的存活率、平均增重及FCR和換水組無異，且得到比換水養殖更高的產量。
|標題title(英)：||Effect of Stocking Density, Substrates and Water Exchange Rate on White Shrimp (Litopenaeus vannamei) Culture|
|作者 auther(英)：||Ming-Hua Yang, Jin-Hua Cheng, Hoa-Ling Kang, I-Ming Chen and Tzyy-Ing Chen|
|摘要abstract(英)：||This study aimed to find the best zero-exchange culture model for white shrimp (Litopenaeus vannamei). Shrimps were cultured in FRP tanks (2 m×2 m×1 m), and organic particles were suspended by strong aeration. The following three experiments were conducted: (1) substrate: net-liners, net-pockets, mats, coral granules and blank control; (2) density: 100, 200, 300 and 400 ind./m2; and (3) zero-exchange water and exchange water (35% ponds of water / week).
Shrimps cultured in tanks with net-pockets exhibited the highest yield and average weight gain and the best FCE, while net-liners isolated the highest amount of suspending particles. The average weight gain of the shrimps was decreased as the stocking density was increased; furthermore, they grew more slowly when the density was in excess of 200 ind./m2. Orthophosphate phosphorous concentrations of the zero-exchange system were significantly higher than those of the exchange system. The inorganic nitrogen compounds were all at safe levels. When compared with those of the exchange system, survival, average weight gain and FCR did not differ between the two treatments; however, the yield was higher in the zero-exchange system.
In conclusion, shrimps cultured in a zero-exchange system with a density of 200 ind./m2 and a substrate of net-pockets produced the highest yield.