Demand‐feeding behaviour and diel pattern of feeding activity in Oncorhynchus mykiss held under different photoperiod regimes
Demand‐feeding behaviour and diel pattern of feeding activity in Oncorhynchus mykiss held under different photoperiod regimes
复制标题
不同光周期条件下虹鳟的需求取食行为和昼夜取食模式
DOI：
--
复制
发表时间：
1992
期刊：
影响因子：
--
通讯作者：
J. Leatherland
中科院分区：
文献类型：
--
作者：
T. Boujard;J. Leatherland
在6：8、12：12或8：16光：暗条件下，用连接到计算机的自食器，在7-10°C的温度下，以30只个体为一组，研究了Oncorhynchus mykis的需求取食行为。日摄食量在1.5~5%的水箱之间变化，比增长率在1.4%~2.6%之间变化，料增重比在0.84~3.17之间变化，与光周期长度无关。无论光照周期如何，98%以上的取食需求发生在光期，主峰出现在黎明，偶尔出现在黄昏。
Demand-feeding behaviour was studied in Oncorhynchus mykiss held at 7–10°C in groups of 30 individuals, under a 16:8, 12:12 or 8 : 16 light : dark regime, using self-feeders connected to a computer. The daily food demand was variable between tanks from 1.5 to 5% of the body weight, the specific growth rate ranged between 1.4 and 2.6% of body weight increase per day, and the feed: gain ratio ranged between 0.84 and 3.17, regardless of the photoperiod length. More than 98% of the feeding demand occurred during the photophase, regardless of the photoperiod, with a main peak at dawn and an occasional peak at dusk.