An assessment of juvenile Atlantic cod distribution and growth using diver operated stereo-video surveys

S. A. M. Elliott, P. A. Ahti, M. R. Heath, W. R. Turrell, D. M. Bailey

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Protecting juvenile fish habitat is of particular importance for their survival. However, in many cases fish habitat requirements are poorly understood. Stereo-video methods can provide non-destructive quantitative information on fish abundance and size in relation to their surrounding environment. 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 size 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 fish size 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.

Fingerprint

Gadus morhua
Fish
fish
gravel
Fisheries
migratory behavior
video cameras
habitat
boulder
habitats
seagrass
Scotland
range size
community composition
protected area
conservation areas
Monitor
transect
Camera
fishery

Keywords

  • conservation
  • fisheries
  • Clyde
  • cod distribution
  • Gadus morhua
  • marine protected areas
  • SCUBA
  • stereo-video cameras
  • coastal habitats

Cite this

@article{cf057bedcb0d48bba530d805f5cb7ae6,
title = "An assessment of juvenile Atlantic cod distribution and growth using diver operated stereo-video surveys",
abstract = "Protecting juvenile fish habitat is of particular importance for their survival. However, in many cases fish habitat requirements are poorly understood. Stereo-video methods can provide non-destructive quantitative information on fish abundance and size in relation to their surrounding environment. 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 size 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 fish size 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.",
keywords = "conservation, fisheries, Clyde, cod distribution, Gadus morhua, marine protected areas, SCUBA, stereo-video cameras, coastal habitats",
author = "Elliott, {S. A. M.} and Ahti, {P. A.} and Heath, {M. R.} and Turrell, {W. R.} and Bailey, {D. M.}",
note = "This is the peer reviewed version of the following article: Elliott, S. A. M., Ahti, P. A., Heath, M. R., Turrell, W. R., & Bailey, D. M. (2016). An assessment of juvenile Atlantic cod distribution and growth using diver operated stereo-video surveys. Journal of Fish Biology, which has been published in final form at http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1095-8649. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.",
year = "2016",
month = "5",
day = "25",
doi = "10.1111/jfb.12998",
language = "English",
journal = "Journal of Fish Biology",
issn = "0022-1112",

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An assessment of juvenile Atlantic cod distribution and growth using diver operated stereo-video surveys. / Elliott, S. A. M.; Ahti, P. A.; Heath, M. R.; Turrell, W. R.; Bailey, D. M.

In: Journal of Fish Biology, 25.05.2016.

Research output: Contribution to journalArticle

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AU - Heath, M. R.

AU - Turrell, W. R.

AU - Bailey, D. M.

N1 - This is the peer reviewed version of the following article: Elliott, S. A. M., Ahti, P. A., Heath, M. R., Turrell, W. R., & Bailey, D. M. (2016). An assessment of juvenile Atlantic cod distribution and growth using diver operated stereo-video surveys. Journal of Fish Biology, which has been published in final form at http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1095-8649. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.

PY - 2016/5/25

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N2 - Protecting juvenile fish habitat is of particular importance for their survival. However, in many cases fish habitat requirements are poorly understood. Stereo-video methods can provide non-destructive quantitative information on fish abundance and size in relation to their surrounding environment. 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 size 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 fish size 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.

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KW - conservation

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KW - Gadus morhua

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KW - coastal habitats

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