Steffens W, Albrecht M L
Arch Tierernahr. 1979 May;29(5):339-47. doi: 10.1080/17450397909424617.
Continuing previous investigations, two test feedstuffs whose fishmeal content had been reduced to 5% and which were supplemented with 4.5 g methionine and 5.0 g lysine per kg resp. 6 g methionine and 6 g lysine per kg were proofed in comparison with a fattening feed for trout as customary in trade and with a fish meal content of 35%. The content of animal protein in the control feed was at least 75% (crude protein content 41%), in test feed I at most 35% (crude protein content 35.4%), in test feed II at most 17% (crude protein content 33.9%). All feedstuffs had the same energy content. The tests were made with rainbow trout (Salmo gairdneri) of 80...100 g at the beginning and at water temperatures of 11...12 degrees C. They were conducted over a period of 112 days. After giving the same amount of feed, growth of and feed expenditure for the fish feed with the test feedstuffs were less suitable than of those fish which had received the control feed. Concerning the protein efficiency ratio, the productive protein value and the energetic expenditure too, the best results were achieved with the control feed.
继续先前的研究，将两种鱼粉含量降至5%的试验饲料分别按每千克补充4.5克蛋氨酸和5.0克赖氨酸、以及每千克补充6克蛋氨酸和6克赖氨酸的量进行调配，并与市售的常规鳟鱼育肥饲料（鱼粉含量35%）作比较。对照饲料中动物蛋白含量至少为75%（粗蛋白含量41%），试验饲料I中动物蛋白含量至多为35%（粗蛋白含量35.4%），试验饲料II中动物蛋白含量至多为17%（粗蛋白含量33.9%）。所有饲料能量含量相同。试验用的是初始体重80……100克的虹鳟（Salmo gairdneri），水温为11……12摄氏度。试验持续112天。投喂等量饲料后，食用试验饲料的鱼的生长情况和饲料消耗情况不如食用对照饲料的鱼。在蛋白质效率比、生产蛋白值和能量消耗方面，对照饲料也取得了最佳结果。
