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Variation in the Catchability of Yellow Perch in an Otter Trawl
Author(s) -
Nielsen Larry A.
Publication year - 1983
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1983)112<53:vitcoy>2.0.co;2
Subject(s) - perch , fishery , catch per unit effort , otter , biology , fishing , population , seasonality , fish <actinopterygii> , ecology , demography , sociology
Changes in the catchability of yellow perch Perca flavescens in an otter trawl were examined by comparing annual catch per unit effort (CPUE) in Oneida Lake to mark‐recapture population estimates over a series of years. Catchability was similar among age groups of adult yellow perch. Annual catchability was similar in 4 of 5 years, but threefold higher in the fifth, presumably due to lower water clarity in that year. Examination of within‐season changes in CPUE indicate that other, undetermined environmental factors also affect catchability.