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- Title
Estimating fish production in wetlands.
- Authors
Tucker, Caroline M.; Giacomini, Henrique C.; Mandrak, Nicholas E.; Wang, Lifei; de Kerckhove, Derrick T.
- Abstract
Fish production integrates changes in biomass from growth, reproduction, and mortality, and is a useful indicator for fisheries management. However, calculation of fish production has been limited by the intensive requirements for data on abundance, biomass, age structure, and vital rates, and so it is uncommon to find estimates of fish production for wetlands. We developed an approach to directly estimate production that is suitable for data-limited systems: a continuous time model of production describing individual growth over short time intervals with continuous time models of abundance and biomass over longer timescales. We applied this model for 18 Great Lakes coastal wetlands (GLCWs) on Lake Ontario, including Big Island Wetland (BIW). In BIW, most species were dominated in abundance and biomass by younger cohorts and, as a result, these young, fast-growing individuals contributed disproportionately to fish production. In total, BIW produced 336.1 kg·ha·year of fish and the other 17 neighbouring ranged between 447.7 and 1119.9 kg·ha·year. These are some of the first estimates of fish production for GLCWs, highlighting their value for managing Great Lakes fisheries.
- Subjects
CONTINUOUS time models; CONTINUOUS time systems; COASTAL wetlands; WETLANDS; WETLAND conservation; FISHERY management; WETLAND soils; FISHERIES
- Publication
Canadian Journal of Fisheries & Aquatic Sciences, 2024, Vol 81, Issue 7, p847
- ISSN
0706-652X
- Publication type
Article
- DOI
10.1139/cjfas-2023-0220