|Appears in Collections:||Aquaculture Journal Articles|
|Peer Review Status:||Refereed|
|Title:||The use of continuous light to suppress pre-harvest sexual maturation in sea-reared Atlantic salmon (Salmo salar L.) can be reduced to a four month window|
|Keywords:||Atlantic salmon Salmo salar L.|
|Citation:||Leclercq E, Migaud H, Taylor J & Hunter D (2010) The use of continuous light to suppress pre-harvest sexual maturation in sea-reared Atlantic salmon (Salmo salar L.) can be reduced to a four month window, Aquaculture Research, 41 (10), pp. e709-e714.|
|Abstract:||In Atlantic salmon Salmo salar L. sexual maturation is concomitant with a redistribution of the somatic resources and the development of nuptial colouration responsible for the low commercial value of mature fish (Michie, 2001). Maturing fish also exhibit an altered feeding activity (Kadri et al., 1996; Kadri et al., 1997a and b) and increased pathogen susceptibility (Bruno, 1989; St-Hilaire et al., 1998; Currie and Woo, 2007) likely to compromise growth, health and welfare of the cohabiting immature cohort. The suppression of pre-harvest sexual maturation is therefore a priority in the salmon on-growing industry and is achieved by photoperiodic manipulation of the stock in the form of continuous artificial-light (LL) applied between the winter and summer solstice during the second year at sea. This 6-month period LL-regime is recognized as the most efficient by providing a key environmental signal that phase-advances the so-called “spring decision window” such that a reduced proportion of the stock meets the developmental/energetic thresholds required to proceed through maturation (Taranger et al., 1998; Endal et al., 2000; Oppedal et al., 2006). Current knowledge on the photoperiodic entrainment of reproduction in Atlantic salmon suggests that terminating LL-exposure before the summer solstice could be equally efficient at suppressing sexual maturation. This study tested this hypothesis on a commercial scale with the objective of reducing energy usage and potential welfare impacts associated with the long-term use of powerful lighting systems in sea-pens (Migaud et al., 2007a).|
|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.|
Marine Harvest (Scotland) Ltd
|LeclercqLightWindow.doc||126 kB||Microsoft Word||Under 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 email@example.com providing details and we will remove the Work from public display in STORRE and investigate your claim.