Effects of photoperiod and melatonin implants on feed intake in Atlantic salmon (Salmo salar L.) postsmolts
Peer reviewed, Journal article
Permanent lenke
http://hdl.handle.net/11250/2381890Utgivelsesdato
2015Metadata
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- Institutt for biologi [2616]
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Originalversjon
Italian Journal of Animal Science 2015, 14:664-669Sammendrag
High melatonin concentrations were expected to negatively affect Atlantic salmon
appetite. Hence, individually kept Atlantic
salmon postsmolts were subjected to continuous light (24:0, L:L) or natural daylight (12:12,
L:D) and then given intraperitoneal implants
of slow release melatonin in a 2 by 2 factorial
design. Possible effects on food intake were
monitored over three weeks. In addition, a
plasma melatonin assessment test was run in
parallel to monitor diurnal blood levels of melatonin through the trial. The surgical intervention was effective, leading to a 10x increase in
mean melatonin levels when compared to control fish, but neither the implant nor the
change in daylight had any significant effect
on feed intake, at least in the short term.