Diurnal and seasonal variation in feeding patterns of Atlantic salmon, Salmo salar L., in sea cages
Diurnal and seasonal variation in feeding patterns of Atlantic salmon, Salmo salar L., in sea cages
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海水网箱中大西洋鲑鱼 Salmo salar L. 摄食模式的日间和季节变化
DOI：
10.1046/j.1365-2109.1999.00385.x
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发表时间：
1999
影响因子：
2
通讯作者：
G. Purser
中科院分区：
文献类型：
--
作者：
Pj Blyth;Pj Blyth;S. Kadri;S. Kadri;S. K. Valdimarsson;S. K. Valdimarsson;D. Mitchell;G. Purser
海笼中的大西洋鲑鱼（Salmo salar L.）表现出昼夜和季节性变化的摄食模式。迄今为止，还没有报告进给速率及其在整个年度周期中的变化的数据。在这里，我们提供来自苏格兰的数据，显示大西洋鲑鱼从转移到海水后不久到大约 11 个月后收获期间每天喂食至饱食的摄食模式和摄食率的昼夜和季节间变化。主要的进食高峰通常发生在黎明后不久，并且进食率在大约一小时内保持较高水平。在当天剩下的时间里，鱼的进食速度较低但稳定。相对饲料摄入量在试验期间有所不同，最初在夏季较高，随后在秋季急剧下降，然后进一步下降，直到鱼在第二年夏初达到收获尺寸。现在应该进一步研究每年进食模式的变化与环境参数之间的关系，以增进对这些模式背后机制的理解。
Atlantic salmon, Salmo salar L., in sea cages exhibit feeding patterns that vary both diurnally and seasonally. Hitherto, there are no data reporting feed rate and its variation through a complete annual cycle. Here we present data from Scotland showing diurnal and interseasonal variation in feeding patterns and feeding rates of Atlantic salmon fed daily to satiation from shortly after transfer to seawater until harvest about 11 months later. A major feeding peak regularly occurred soon after dawn, and feeding rates remained high for, approximately one hour. Over the remainder of the day, the fish fed at a lower but steady rate. Relative feed intake varied over the trial, being initially high in summer followed by a sharp decline in autumn, and then further declining until fish reached harvest size at the beginning of the following summer. Further investigations of the relationship between variation in circannual feeding patterns and environmental parameters should now be carried out to improve the understanding of the mechanism behind these patterns.