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Comparing towed and baited underwater video techniques for assessing temperate marine fishes

Citation

Monk, J and Ierodiaconou, D and Versace, VL and Rattray, A and Stagnitti, F and Harvey, E, Comparing towed and baited underwater video techniques for assessing temperate marine fishes, GEOHAB 2011 Program, 03-06 May, Helsinski, Finland (2011) [Conference Extract]

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Abstract

Accurate estimates of fish species occurrence are important to any speciesí assessments and distribution model. With increasing emphasis on non-destructive sampling, underwater video techniques are commonly used without a thorough understanding of their advantages and disadvantages. This study compared data collected from baited remote underwater stereo-video systems (stereo BRUVS) and towed-video systems to determine; (1) the differences between these video techniques in terms of fish assemblages, functional groups (i.e. pelagic carnivore, epibenthic carnivore/omnivore or herbivore) and observability (i.e. conspicuous or cryptic), and (2) what impact do these two techniques have on the interpretation of spatially-explicit, predictive models. We found stereoBRUVS and towed-video techniques recorded very different assemblages, functional groups and observability categories across structurally complex benthic biological habitats (i.e. macroalgae dominated habitats). However, as the habitat complexity became less (e.g. seagrass and areas with no visible macro-biota) both techniques appeared to provide similar fish assemblage information. We also found considerable differences in the predicted extents of habitat suitability between the two video techniques.

Item Details

Item Type:Conference Extract
Keywords:video, fish, contrast
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Aquatic Ecosystem Studies and Stock Assessment
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Marine Flora, Fauna and Biodiversity
UTAS Author:Monk, J (Dr Jacquomo Monk)
ID Code:126675
Year Published:2011
Deposited By:Ecology and Biodiversity
Deposited On:2018-06-20
Last Modified:2018-06-21
Downloads:0

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