Campus Units

Natural Resource Ecology and Management

Document Type

Conference Proceeding

Conference

American Fisheries Society Symposium 85

Publication Version

Published Version

Publication Date

2017

Journal or Book Title

Muskellunge Management: Fifty Years of Cooperation Among Anglers, Scientists, and Fisheries Biologists

First Page

437

Last Page

465

Conference Title

2016 Hugh C. Becker Memorial Muskie Symposium

Conference Date

March 13-15, 2016

City

Minnetonka, Minnesota

Abstract

Muskellunge Esox masquinongy management programs often rely on stocking to create and maintain populations. In many instances, a native and nearby stocking source is unavailable or a genetically suitable brood source is unclear. Genetic differences among stocks of Muskellunge may influence survival and growth when introduced into novel environments. Consequently, the selection of a suitable brood source can be difficult and possibly critical to the success of Muskellunge stocking programs. We examined differences in long-term survival and growth among introduced Muskellunge stocks from the Ohio and upper Mississippi River drainages and a mixed-origin Illinois broodstock population in three Illinois reservoirs. Catch per unit effort (CPUE) from spring modified-fyke netting suggested that the upper Mississippi River drainage stock at ages 3 and 4 persisted at lower relative abundance compared to conspecifics; however, low lake- and stock-specific catches of older ages precluded robust CPUE comparisons among stocks. Apparent survival, estimated from mark-recapture data with the Cormack-Jolly-Seber open population model, differed among stocks I-year poststocking, with the upper Mississippi River drainage stock exhibiting markedly lower survival compared to conspecifics. Annual variation in survival to age 1.5 was related to water temperature at stocking, fish size at stocking, first winter temperatures, and first summer temperatures. However, survival did not differ among stocks for Muskellunge age 2 and older, indicating that important factors structuring long-term survival exert their effects most strongly in the first year poststocking. Despite overall low survival of Muskellunge from the upper Mississippi River drainage, males that survived exhibited a slight growth advantage compared to conspecifics. No growth advantage was observed for upper Mississippi River drainage stock females. Our findings suggest that stock selection in addition to environmental conditions can influence survival of introduced Muskellunge and subsequent contribution to the fishery.

Comments

This is a proceeding from Wagner, C, M Diana, M Wolter, C DeBoom, MJ Weber, and DH Wahl. 2017. Survival and growth of three geographically distinct stocks of Muskellunge introduced into Midwestern reservoirs. Pages 437‐465 in KL Kapuscinski, TD Simonson, DP Crane, SJ Kerr, JS Diana, and JM Farrell, editors. Muskellunge management: fifty years of cooperating among anglers, scientists, and fisheries biologists. American Fisheries Society, Symposium 85, Bethesda, Maryland.

Copyright Owner

American Fisheries Society

Language

en

File Format

application/pdf

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