Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/22618
Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Manipulation of farmed Atlantic salmon swimming behaviour through the adjustment of lighting and feeding regimes as a tool for salmon lice control
Authors: Frenzl, Benedikt
Stien, Lars Helge
Cockerill, David
Oppedal, Frode
Richards, Randolph
Shinn, Andrew
Bron, James
Migaud, Herve
Contact Email: herve.migaud@stir.ac.uk
Keywords: Lepeophtheirus salmonis
Salmo salar
Light
Submerged feeding
Behaviour
Issue Date: 20-Mar-2014
Publisher: Elsevier
Citation: Frenzl B, Stien LH, Cockerill D, Oppedal F, Richards R, Shinn A, Bron J & Migaud H (2014) Manipulation of farmed Atlantic salmon swimming behaviour through the adjustment of lighting and feeding regimes as a tool for salmon lice control, Aquaculture, 424-425, pp. 183-188.
Abstract: This paper describes a study in which environmental manipulation of salmon swimming depth was tested in an attempt to reduce farm infection of Atlantic salmon, Salmo salar by the salmon louse, Lepeophtheirus salmonis. The effects of submerged artificial lighting (positioned at 10m depth) in combination with submerged feeding (delivered at 5m depth) were tested with respect to salmon swimming depth and sea lice infection, following the hypothesis that L. salmonis infection in a commercial salmon population is reduced when exposed to deep lighting and feeding. This is based on two assumptions, firstly that planktonic L. salmonis larvae principally remain in surface waters (top 4m) and secondly, that deep lighting and feeding attract salmon to deeper water depths. Results from commercial scale trials confirmed that salmon swimming behaviour is altered under submerged feeding conditions with fish attracted to the feeding corridor during the feeding process. When the fish reached satiation or feeding ceased, they returned to the surface waters during the day. Submerged lighting attracted the fish to the illuminated water depths during the night. During the day, natural light overruled these effects to some extent. The number of L. salmonis on fish exposed to deep submerged lighting was significantly lower than the number of lice found on salmon in cages with surface lighting during the summer months. Submerged feeding showed no advantage over surface feeding with respect to the number of L. salmonis found in these trials. The results of the study suggest that swimming depth manipulation can be used at a commercial scale to reduce salmon lice burdens on Atlantic salmon stocks.
Type: Journal Article
URI: http://hdl.handle.net/1893/22618
DOI Link: http://dx.doi.org/10.1016/j.aquaculture.2013.12.012
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Affiliation: University of Stirling
Institute of Marine Research (IMR)
Marine Harvest (Scotland) Ltd
Institute of Marine Research (IMR)
Aquaculture
Aquaculture
Aquaculture
Aquaculture

Files in This Item:
File Description SizeFormat 
Frenzl et al .pdf4.37 MBAdobe PDFUnder Embargo until 31/12/2999     Request a copy

Note: If any of the files in this item are currently embargoed, you can request a copy directly from the author by clicking the padlock icon above. However, this facility is dependant on the depositor still being contactable at their original email address.

This item is protected by original copyright



Items in the Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

If you believe that any material held in STORRE infringes copyright, please contact library@stir.ac.uk providing details and we will remove the Work from public display in STORRE and investigate your claim.