Validation of a vigour index for trawl-caught Norway lobsters (Nephrops norvegicus) destined for the live market: underlying links to both physiological condition and survivability

Albalat, A., Sinclair, S. and Neil, D. (2017) Validation of a vigour index for trawl-caught Norway lobsters (Nephrops norvegicus) destined for the live market: underlying links to both physiological condition and survivability. Fisheries Research, 191, pp. 25-29. (doi: 10.1016/j.fishres.2017.02.016)

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Abstract

Recent improved practices in the trawl fishery for Norway lobsters (Nephrops norvegicus) have made it possible to increase the proportion of trawl-caught lobsters that can be transported alive successfully. A major contributor to this has been the introduction of on-board seawater tanks, which allow for the recovery of animals immediately after they have been landed fromthe net.In this study, we have validated a vigour index that could be used both by fisheries scientists and by the industry dealing with live-traded Nephrops, allowing identification of the proportion of trawl-caught lobsters that fail to recover following capture and are not in a condition to survive live transportation. Results indicate that the process of visual selection into one of four possible vigour categories reflects with good accuracy the underlying physiological state ofthe animals, as assessed by the level of adenylate 5 –triphosphate in the tailmuscles, by the proportions of other nucleotides as expressed in the Adenylate Energy Charge, and by the amount of intra-muscular l-lactate present. The vigour index also correlates well with their subsequent survival potential in a semi-dry transport system.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Neil, Professor Douglas and Albalat, Dr Amaya
Authors: Albalat, A., Sinclair, S., and Neil, D.
College/School:College of Medical Veterinary and Life Sciences > Institute of Biodiversity Animal Health and Comparative Medicine
College of Medical Veterinary and Life Sciences > School of Cardiovascular & Metabolic Health
College of Medical Veterinary and Life Sciences > School of Biodiversity, One Health & Veterinary Medicine
Journal Name:Fisheries Research
Publisher:Elsevier
ISSN:0165-7836
ISSN (Online):1872-6763
Published Online:15 May 2017
Copyright Holders:Copyright © 2017 Elsevier B.V.
First Published:First published in Fisheries Research 191: 25-29
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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