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<p>Current data on lake trout (<i>Salvelinus namaycush</i>) populations in Manitoba are limited but essential for guiding effective management decisions. To address this gap, academics and provincial fisheries biologists collaborated to conduct standardized netting surveys across seven lake trout fisheries in Manitoba during 2021 and 2022. Life history characteristics were quantified and compared, with length-at-age back-calculated from individual lake trout, and growth assessed using von Bertalanffy growth functions. Significant differences in growth parameters (<i>L</i><sub><i>∞</i></sub><i>, K, t</i><sub><i>0</i></sub>, and <i>ω</i>) were observed across lakes. A sustainable exploitation model applied to the data revealed most lake trout fisheries are healthy. However, some underlying concerns exist that could jeopardize the future sustainability of a few of the fisheries. Findings highlight the need for ongoing population monitoring to support management objectives. We propose several actionable strategies for lake trout conservation in Manitoba, including incorporating citizen science and collaborating with Indigenous communities for co-production of knowledge.</p>

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Application of a population status model on several recreational lake trout (Salvelinus namaycush) fisheries in Manitoba, Canada

  • 期刊论文

  • 发表日期：

    2025年4月7日

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  • Giulio Navarroli,
  • Bradley E. Howell,
  • Andrew W. R. Klein,
  • Eric J. Mullen,
  • Olivier Morissette,
  • Michael D. Rennie,
  • Caleb T. Hasler

摘要

Current data on lake trout (Salvelinus namaycush) populations in Manitoba are limited but essential for guiding effective management decisions. To address this gap, academics and provincial fisheries biologists collaborated to conduct standardized netting surveys across seven lake trout fisheries in Manitoba during 2021 and 2022. Life history characteristics were quantified and compared, with length-at-age back-calculated from individual lake trout, and growth assessed using von Bertalanffy growth functions. Significant differences in growth parameters (L∞, K, t0, and ω) were observed across lakes. A sustainable exploitation model applied to the data revealed most lake trout fisheries are healthy. However, some underlying concerns exist that could jeopardize the future sustainability of a few of the fisheries. Findings highlight the need for ongoing population monitoring to support management objectives. We propose several actionable strategies for lake trout conservation in Manitoba, including incorporating citizen science and collaborating with Indigenous communities for co-production of knowledge.