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

BMC Research Notes

Antti Eloranta²  Hanna-Kaisa Lakka¹  Juha Merilä³ 

[1] Department of Environmental Sciences, University of Helsinki, Lahti, 15140, Finland;Department of Biological and Environmental Sciences, University of Jyväskylä, Jyväskylä, 40014, Finland;Ecological Genetics Research Unit, Department of Biosciences, University of Helsinki, Helsinki, 00014, Finland

关键词: Funnel trap;    Stickleback;    Pungitius pungitius;    CPUE;    Catchability;    Trap;    Fishery;   

Others  :  1142933
DOI  :  10.1186/1756-0500-6-151

 received in 2013-02-21, accepted in 2013-04-10,  发布年份 2013

【 摘 要 】

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.

【 授权许可】

   
2013 Merilä et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

Figure 2.

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