An assessment of juvenile Gadus morhua distribution and growth using diver operated stereo-video surveys

Elliott, S.A.M., Ahti, P.A., Heath, M.R., Turrell, W.R. and Bailey, D.M. (2016) An assessment of juvenile Gadus morhua distribution and growth using diver operated stereo-video surveys. Journal of Fish Biology, 89(2), pp. 1190-1207. (doi: 10.1111/jfb.12998) (PMID:27221152) (PMCID:PMC4999031)

[img]
Preview
Text
118418.pdf - Published Version
Available under License Creative Commons Attribution.

1MB

Abstract

Stereo-video scuba transects were conducted during daylight hours from June to September 2013 within a proposed marine protected area (MPA) in the Firth of Clyde, west of Scotland. More juvenile Atlantic cod Gadus morhua of fork length (LF) range 6–11 cm were observed in substrata containing mixed gravel, including maerl, than in boulder-cobble substrata with high algal cover, or sand with low density seagrass. Community composition was significantly different between substratum types. A decrease in G. morhua abundance was observed over the period of data collection. Over time, mean and variance in G. morhua LF increased, indicating multiple recruitment events. Protecting mixed gravel substrata could be a beneficial management measure to support the survival and recruitment of juvenile G. morhua; other substrata might be important at night given their diel migratory behaviour. Stereo-video cameras provide a useful non-destructive fisheries-independent method to monitor species abundance and length measurements.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Bailey, Dr David
Authors: Elliott, S.A.M., Ahti, P.A., Heath, M.R., Turrell, W.R., and Bailey, D.M.
College/School:College of Medical Veterinary and Life Sciences > Institute of Biodiversity Animal Health and Comparative Medicine
Journal Name:Journal of Fish Biology
Publisher:Wiley
ISSN:0022-1112
ISSN (Online):1095-8649
Published Online:25 May 2016
Copyright Holders:Copyright © 2016 The Authors
First Published:First published in Journal of Fish Biology 89(2): 1190-1207
Publisher Policy:Reproduced under a Creative Commons License

University Staff: Request a correction | Enlighten Editors: Update this record