Feeding by hatchery‐reared and wild brown trout, Salmo trutta L., in a Norwegian stream
Feeding by hatchery‐reared and wild brown trout, Salmo trutta L., in a Norwegian stream
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挪威溪流中孵化场饲养的野生褐鳟鱼 Salmo trutta L. 正在进食
DOI：
10.1111/j.1365-2109.1986.tb00115.x
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发表时间：
1986
影响因子：
2
通讯作者：
O. Ugedal
中科院分区：
文献类型：
--
作者：
B. Johnsen;O. Ugedal
.孵化饲养的褐鳟鱼，萨尔莫特鲁塔L.，一岁鸽捕获后不久（3小时至一周），他们释放在挪威流。并与野生褐鳟进行了比较。调查在三个不同时期进行（5月、7月和10月）。对漂流动物的调查表明，食物供应在5月最好。大多数孵化饲养褐鳟鱼开始喂养后不久，他们在所有三个时期的释放。孵化场的鱼经历了一个学习的过程，关于喂养。这是最清楚地证明了在他们的胃，这总是更大的孵化场鱼比野生鱼，但随着时间的推移，在孵化场鱼胃释放后，在所有三个时期的植物碎片的量。大约一个星期后释放，孵化场鳟鱼似乎是喂养野生猎物几乎一样，野生鱼类，但他们实现了这一点在5月比10月。
. Hatchery-reared brown trout, Salmo trutta L., yearlings were captured shortly (3h to one week) after their release in a Norwegian stream. The feeding of recaptured hatchery fish was compared with that of wild brown trout. The investigations were carried out during three different periods (May, July and October). Investigations of drift fauna indicated that food availability was best in May. Most hatchery-reared brown trout started feeding shortly after their release in all three periods. Hatchery fish went through a learning process with respect to feeding. This was most clearly demonstrated by the amounts of plant fragments in their stomachs, which were always greater in hatchery fish than in wild fish but which decreased with time after release in hatchery fish stomachs in all three periods. By about a week after release, hatchery trout appeared to be feeding on wild prey nearly as well as did wild fish, but they achieved this better in May than in October.