Large differences in catch per unit of effort between two minnow trap models

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http://hdl.handle.net/10138/42793

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Merilä , J , Lakka , H-K & Eloranta , A 2013 , ' Large differences in catch per unit of effort between two minnow trap models ' , BMC research notes . https://doi.org/10.1186/1756-0500-6-151

Title: Large differences in catch per unit of effort between two minnow trap models
Author: Merilä, Juha; Lakka, Hanna-Kaisa; Eloranta, Antti
Contributor: University of Helsinki, Biosciences
University of Helsinki, Environmental Ecology
Date: 2013-04
Language: eng
Belongs to series: BMC research notes
ISSN: 1756-0500
URI: http://hdl.handle.net/10138/42793
Abstract: Background Little is known about variation in catch per unit of effort (CPUE) in stickleback fisheries, or the factors explaining this variation. We investigated how nine-spined stickleback (Pungitius pungitius) CPUE was influenced by trap model by comparing the CPUEs of two very similar minnow trap models fished side-by-side in a paired experimental design. Results The galvanized trap type (mean CPUE = 1.31 fish h–1) out-fished the black trap type (mean CPUE = 0.20 fish h–1) consistently, and yielded on average 81% more fish. Conclusions The results demonstrate that small differences in trap appearance can have large impacts on CPUE. This has implications for studies designed to investigate abundance and occurrence of fish using minnow traps.
Subject: 1181 Ecology, evolutionary biology
fishery
trap
catchability
CPUE
Pungitius pungitius
stickleback
funnel trap
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