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Diurnal and seasonal variation in feeding patterns of Atlantic salmon, Salmo salar L.., in sea cages


Blyth, PJ and Kadri, S and Valdimarsson, SK and Mitchell, DF and Purser, GJ, Diurnal and seasonal variation in feeding patterns of Atlantic salmon, Salmo salar L.., in sea cages , Aquaculture Research, 30, (7) pp. 539-544. ISSN 1355-557X (1999) [Refereed Article]

DOI: doi:10.1046/j.1365-2109.1999.00385.x


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.

Item Details

Item Type:Refereed Article
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Fisheries sciences
Research Field:Aquaculture
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - aquaculture
Objective Field:Fisheries - aquaculture not elsewhere classified
UTAS Author:Blyth, PJ (Mr Peter John Blyth)
UTAS Author:Purser, GJ (Associate Professor John Purser)
ID Code:16751
Year Published:1999
Web of Science® Times Cited:13
Deposited By:TAFI - Aquaculture
Deposited On:1999-08-01
Last Modified:2011-08-05

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