Campus Units

Natural Resource Ecology and Management

Document Type

Article

Publication Version

Accepted Manuscript

Publication Date

11-2019

Journal or Book Title

Fisheries Research

Volume

219

First Page

105335

DOI

10.1016/j.fishres.2019.105335

Abstract

Estimating fishing mortality, including initial and delayed mortality, is necessary to assess potential effects of catch and release tournament fishing events. Previous studies retaining angler-caught fish are useful in understanding delayed mortality but have associated limitations. As an alternative to tournament mortality studies, we estimated daily apparent survival rates of largemouth bass Micropterus salmoidesusing a modified Cormack-Jolly-Seber model in Program MARK to test for the duration of delayed tournament mortality and to identify important covariates affecting survival. Multiple monotonic trends were evaluated to test acute (2, 3, 4, or 7 d) and chronic (15 or 30 d) delayed mortality hypotheses. The most supported models revealed an acute trend in survival following tournament capture but no support for chronic mortality. Largemouth bass survival decreased with increases in water temperature and the number of tournament capture events. Combined, these factors resulted in up to 90% cumulative mortality at temperatures of 18.8 °C for individuals captured at five tournament events. Our results confirm the potential for high delayed mortality associated with catch and release fishing tournaments. Using mark-recapture data to understand tournament fishing mortality can be a valuable tool in managing highly fished systems.

Comments

This is a mansucript of an article published as Sylvia, Andrea, and Michael J. Weber. "Use of a mark-recapture model to evaluate largemouth bass delayed tournament mortality." Fisheries Research 219 (2019): 105335. doi: 10.1016/j.fishres.2019.105335. Posted with permission.

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

Copyright Owner

Elsevier B.V.

Language

en

File Format

application/pdf

Available for download on Sunday, November 01, 2020

Published Version

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