水产动物对饲料中的蛋白质水平要求较高 ,一般是畜禽的 2～ 4倍 ,通常占配方的 2 5 %～ 5 0% ,甚至更多。水产动物蛋白饲料的来源主要依赖于鱼粉。国际渔业协会的调查表明 ,近十几年来全球鱼粉需要量连年逐步上升 ,仅 1 996年就比1 991年上升了 46 7% (平远摘译 ,1 998)。单纯 Aquatic animals have high requirements on the protein level of feed, usually 2 to 4 times that of livestock and poultry, and usually account for 25% to 50% or even more of the formula. The source of aquatic animal protein feed depends mainly on fishmeal. According to a survey conducted by the International Fisheries Institute, the global demand for fishmeal has risen steadily over the past decade, rising by 46.7% in 1991 compared with 1991 alone (Excerpt, 1998). simple