A Global Review of Catch Efficiencies of Towed Fishing Gears Targeting Scallops
A Global Review of Catch Efficiencies of Towed Fishing Gears Targeting Scallops
Date
2022-10-29
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Authors
Delargy, Adam J.
Blackadder, Lynda
Bloor, Isobel
McMinn, Carrie
Rudders, David B.
Szostek, Claire L.
Dobby, Helen
Kangas, Mervi
Stewart, Bryce D.
Williams, James R.
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Publisher
Taylor & Francis
Abstract
The catch efficiency of towed fishing gears is the fraction of the target species in the gear
path that were caught and retained. Catch efficiency is fundamental for calculating population
status required for establishing fisheries management reference points. Consequently, catch
efficiency has been estimated for many commercially important scallop (Pectinid) fisheries.
This article synthesizes and discusses estimates of catch efficiency of towed gears used to
target scallops, the methods for estimating catch efficiency and the factors that influence
these estimates. There exists considerable variation in catch efficiency estimates among
studies (0.1 to 0.7), and it is important that this variation is accounted for during surveys
and stock assessments to avoid erroneous advice and estimates. The high variation was
driven by differences in experimental conditions, estimation methods and scallop behavior.
Scallop size and substrate type were the two most common reporting categories discussed
in the studies and consequently should be considered the two most important drivers of
catch efficiency. Other important factors such as gear specifications, and scallop species
were featured in some studies. This review will be highly useful for designing catch efficiency
experiments, survey design and stock assessments by understanding, and accounting for,
catch efficiency variation.
Description
Publication history: Published online - 29 October 2022.
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Article
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Keywords
Scallops , catch efficiency , gear design , global review , survey design
Citation
Delargy, A.J., Blackadder, L., Bloor, I., McMinn, C., Rudders, D.B., Szostek, C.L., Dobby, H., Kangas, M., Stewart, B.D., Williams, J.R. and Stokesbury, K.D.E. (2022) ‘A Global Review of Catch Efficiencies of Towed Fishing Gears Targeting Scallops’, Reviews in Fisheries Science & Aquaculture. Informa UK Limited. Available at: https://doi.org/10.1080/23308249.2022.2139170.