Baiting improves CPUE in nine-spined stickleback (Pungitius pungitius) minnow trap fishery

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http://hdl.handle.net/10138/162255

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Merilä , J 2015 , ' Baiting improves CPUE in nine-spined stickleback ( Pungitius pungitius ) minnow trap fishery ' , Ecology and Evolution , vol. 5 , no. 17 , pp. 3737-3742 . https://doi.org/10.1002/ece3.1635

Title: Baiting improves CPUE in nine-spined stickleback (Pungitius pungitius) minnow trap fishery
Author: Merilä, Juha
Contributor: University of Helsinki, Biosciences
Date: 2015-09
Language: eng
Number of pages: 6
Belongs to series: Ecology and Evolution
ISSN: 2045-7758
URI: http://hdl.handle.net/10138/162255
Abstract: Whether or not baiting influences stickleback catch per unit effort (CPUE) remains a matter of debate among stickleback researchers: While the opinions about the impact of baiting on CPUE differ, supporting quantitative data are scarce. The effect of baiting and trap type on nine-spined stickleback (Pungitius pungitius) CPUE was studied in a field experiment conducted over four consecutive days in a small pond in northeastern Finland. The results show that baited traps yielded better (mean CPUE=1.24 fish/trap/d) catches than unbaited traps (mean CPUE=0.66); however, there were also differences in CPUE depending on the type of collapsible trap that was used. The trap type effect on CPUE seemed to differ among age classes - the finer meshed trap caught more young-of-the-year fish than the coarse-meshed one, whereas the opposite was true for the older and larger individuals. The results agree with those of an earlier more restricted study conducted in the same locality: Together, these results provide strong evidence for the positive impact of baiting on nine-spined stickleback CPUE.
Subject: Bait
CPUE
Haemopis sanguisuga
minnow trap
ninespine stickleback
Pungitius pungitius
COD GADUS-MORHUA
RESPONSES
1181 Ecology, evolutionary biology
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