- 作者： 鄭仿健; 李武忠; 徐嘉瑩
- 作者服務機構： 國立臺灣海洋學院水產養殖系
- 中文摘要：
淡水蝦餵以新鮮魚肉時，其最大攝食率約為體重之5.7～7.0％形之間。攝食率隨攝食時間之延
長而增加，但長時間（21天）餵以同一種食物，則淡水蝦攝食率有減低趨勢（7.0～5.7％）。
當以最大攝食能量（76.95 cal/kcal/day）一次投餵淡水蝦時，耗氧量在8小時達到高?，而
餵以少量食物時，耗氧量在4小時內達到最高?。
淡水蝦耗氧量與攝食率呈正相關，可以y=12.92+0.176x (r=0.97)表示。
淡水蝦成長率與攝食率呈一弧線關係，可以y=-12.653+0.786x-0.006x2表示，在此情況
下成長率與攝食率成弧線關係。
淡水蝦排泄物含能量與特殊行動能（SDA）與攝食率亦呈弧線關係，可以y=-11.288+
0.496x+0.002x2表示，當攝食能量在22 cal/kcal/day時，能量吸收效率最高，排泄物含能量
與特殊行動能最低。
淡水蝦攝食能量控制在40～50 cal/kcal/day範圍時，分配在生長方面的能量比例最高。
淡水蝦之日常新陳代謝率約在12.92 cal/kcal/day左右。
本研究結果顯示食物投餵次數對淡水蝦生長有重要影響，每日投餵一次（76 cal/kcal/day）
之成長率比分兩次投餵（38cal/kcal/day x 2）之成長率少4.67cal/kcal/day。此外一次投餵
（76 cal/kcal/day）較兩次投餵（40.09 cal/kcal/pay x 2）之高?耗氧量多出8.616 cal/kcal/day，
放養密度因而必須遞減。l - 英文摘要： Maximum food consumption rate of Macro-brachium rosenbergii is about 5.7-7.O% of bodyweight. The amount of food consumption rateincreases as feeding duration lengthens. However,when the prawn is fed with a single type ofdiet for a prolonged period of time, food con-sumption rate tends to decrease. When max-imum food ration is given to the prawn in onesingle ration, oxygen consumption rate reachesa maximum level in 8 hours, while less foodrations (1/4 to 3/4 maximum ration) takes only4 hours to reach their maximum level. Respira-tion rate (cal/kcal/day) of Macrobrachium rosen-bergii is positively and linearly related to foodconsumption rate (cal/kcal/day) and may berepresented by the equation y=12.92+0.176x(r=0.97). Growth rate (cal/kcal/day) is curvilinearlyrelated to food consumption rate (cal/kcal/day)and may be represented by y=-12.653+0.786x-0.006x2. Wastes and SDA (cal/kcal/day) arealso curvilinearly related to food consumptionrate (cal/kcal/day) and may be represented byy=-11.288+0.496x+0.002x2. Wastes and SDAare minimum when food consumption rate iskept at about 22 cal/kcal/day. At 40-50 cal/kcal/day of food consumption rate, energyallocated to growth is maximum. Daily routinemetabolism of Macrobrachium rosenbergii is about12.92 cal/kcal/day. Results of this study suggest that feedingfrequencies could affect growth rate and carryingcapacity of the prawn notably. When food(76 cal/kcal/day) is given to prawn in one singleration, growth rate is 4.67 cal/kcal/day less thanthose fed twice with half ration (38 cal/kcal/feeding x 2 feeding/day). Peak respiration rateof prawn fed one single ration at 76 cal/kcal/day is also 8.616 cal/kcal/day higher than thosefed twice with 40.09 cal/kcal/feeding regimen,thus resulting in a reduced level of carryingcapacity.
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