農業部-水產試驗所全球資訊網農業部-水產試驗所全球資訊網

本試驗探討在不同放養密度下對史氏鱘(Acipenser schrencki) 成長之影響。試驗分兩個階段，第一階段放養密度分別為10、20、30及40尾/m³ (相當於0.223、0.454、0.663及0.896 kg/m³)，飼育16週；第二階段放養密度分別為4、8、12及16尾/m³ (相當於3.523、6.988、10.458及13.938 kg/m³)，飼育12週。成長結果顯示，兩次試驗較高密度組，其平均體重、成長率、餌料轉換率及肥滿度均與較低密度組有顯著差異。當單位水體的生物量達到約8 ~ 10 kg/m³時，成長率隨放養密度的增加而相對減少。為提高鱘魚的養殖效益，在養殖過程中宜定期進行篩選，逐步降低放養密度，以達到較快的成長速率。

The experiment was to study the effect of density on the growth of Amur river sturgeon (Acipenser schrencki) in two grow-out trials. Fish with average weight around 22 g were reared at the density of 0.223, 0.454, 0.663 and 0.896 kg/m³ water in the first trial for 16 weeks. Fish with average weight between 880 and 871 g were reared at 3.523, 6.988, 10.458 and 13.938 kg/m³ water for 12 weeks. In both trials, the average final weight, growth rate, feed conversion rate and condition factor of fish that were reared at high density were significantly different from those at low density. The effect of density of which the biomass was over 8-10 kg/m³ water, the growth of sturgeon was inversely related to the density, which the higher condition factor was found in fish that was reared at lower density. Results suggested that periodic sieving to reduce stocking density was necessary to enhance the growth of sturgeon.