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Relation Between Sport‐Fishing Catchability Coefficients and Salmon Abundance
Author(s) -
Peterman Randall M.,
Steer Gregory J.
Publication year - 1981
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(1981)110<585:rbscca>2.0.co;2
Subject(s) - fishing , fishery , abundance (ecology) , stock (firearms) , population , ecosystem , environmental science , stock assessment , predation , geography , ecology , biology , demography , archaeology , sociology
Pacific salmon sport‐fishing data without time trends in the catchability coefficient q or in fish abundance N show that q is larger at lower N. This phenomenon causes serious management problems because it creates critical thresholds in population size and fishing effort that can lead to stock extinction. The inverse relation between q and N directly parallels the analogous relation shown by some predators in natural ecosystems.