Population characteristics of channel catfish near the northern edge of their distribution: implications for management

Fisheries Management and Ecology
By:  and 

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Abstract

Channel catfish, Ictalurus punctatus (Rafinesque), populations in six lakes in northern Idaho, USA, were sampled to describe their population characteristics. During the summers of 2011 and 2012, 4864 channel catfish were sampled. Channel catfish populations had low to moderate catch rates, and length structure was dominated by fish <400 mm. Channel catfish were in good body condition. All populations were maintained by stocking age-1 or age-2 fish. Growth of fish reared in thermally enriched environments prior to stocking was fast compared to other North American channel catfish populations. After stocking, growth of channel catfish declined rapidly. Once stocked, cold water temperatures, prey resources and (or) genetic capabilities limited growth. Total annual mortality of age 2 and older channel catfish was generally <40%. Tag returns indicated that angler exploitation was low, varying from 0 to 43% among lakes. This research provides insight on factors regulating channel catfish population dynamics and highlights important considerations associated with their ecology and management.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Population characteristics of channel catfish near the northern edge of their distribution: implications for management
Series title Fisheries Management and Ecology
DOI 10.1111/fme.12156
Volume 22
Issue 6
Year Published 2015
Language English
Publisher John Wiley & Sons
Publisher location New York, NY
Contributing office(s) Coop Res Unit Seattle
Description 9 p.
First page 530
Last page 538
Online Only (Y/N) N
Additional Online Files (Y/N) N