Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/22030
Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Delousing efficiency of farmed ballan wrasse (Labrus bergylta) against Lepeophtheirus salmonis infecting Atlantic salmon (Salmo salar) post-smolts
Authors: Leclercq, Eric
Davie, Andrew
Migaud, Herve
Contact Email: andrew.davie@stir.ac.uk
Keywords: farmed ballan wrasse
sea-lice
Atlantic salmon
functional predator response
delousing
biological control
Issue Date: Aug-2014
Publisher: Wiley-Blackwell
Citation: Leclercq E, Davie A & Migaud H (2014) Delousing efficiency of farmed ballan wrasse (Labrus bergylta) against Lepeophtheirus salmonis infecting Atlantic salmon (Salmo salar) post-smolts, Pest Management Science, 70 (8), pp. 1274-1282.
Abstract: BACKGROUND: Cleaner-fish (wrasse, Labridae) are increasingly deployed within the Atlantic salmon (Salmo salar L.) industry as a biological control against sea-lice (Lepeophtheirus salmonis Krøyer). Two tank-based trials were performed to test the effect of farmed ballan wrasse (Labrus bergylta Ascanius) body mass and supplementary feeding on the delousing of Atlantic salmon post-smolts with an initial infection level of ∼12 lice salmon-1 and a ∼5% wrasse:salmon ratio. RESULTS: Sea-louse levels below 0.5 lice salmon-1 were obtained within 84 h, and preferential preying upon larger motile stages was found. The wrasse body mass and the availability of fresh, opened blue mussels (Mytilus edulis L.) did not significantly affect delousing efficiency. The functional predator response was linear, showing no minimum prey density threshold for sea-louse foraging and no satiation plateau, in spite of the high consumption rates measured. Sea-louse infection levels declined following a one-phase exponential decay model, with a standardised decline time constant of 0.8-1.3% h-1 for each wrasse stocked per 100 salmon. CONCLUSIONS: Farmed ballan wrasse are confirmed as highly effective therapeutic and preventive biological controls against sea-lice. The study supports the current minimum hatchery size target (10 mm total length) and the use of supplementary feeding to sustain the wrasse stocks in operation. The functional predator response and the standardised decline time constant of sea-louse abundance are proposed as useful indicators of delousing efficiency. © 2013 Society of Chemical Industry
Type: Journal Article
URI: http://hdl.handle.net/1893/22030
DOI Link: http://dx.doi.org/10.1002/ps.3692
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: Aquaculture
Aquaculture
Aquaculture

Files in This Item:
File Description SizeFormat 
Leclercq_et_al-2014-Pest_Management_Science.pdf717.82 kBAdobe 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.