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Analysis of cyclic population dynamics of snow crab in the southern Gulf of St. Lawrence using a stage-structured discrete-time population model

Author

Listed:
  • Léger, S.
  • Mazerolle, J.
  • Sainte-Marie, B.
  • Surette, T.

Abstract

The snow crab fishery is one of Canada’s most profitable fisheries and is a significant economic driver in coastal communities in Atlantic Canada and Quebec. Snow crab is generally considered to be a stenothermic species and warming due to climate change is a concern. Population models are valuable tools for understanding and predicting how biological populations change over time and how they respond to environmental and anthropic pressures. However, due to the species’ complex life cycle, developing an adequate population dynamics model is challenging. To address this, we develop a discrete-time population model incorporating three developmental stages for each sex : immature, adolescent and adult for the male; immature, prepubescent and adult for the female. The model is parameterized to study the snow crab population in the southern Gulf of St. Lawrence and includes density-dependent processes (i.e. intercohort cannibalism), while groundfish predation is excluded due to its presumed minimal impact in this region.

Suggested Citation

  • Léger, S. & Mazerolle, J. & Sainte-Marie, B. & Surette, T., 2026. "Analysis of cyclic population dynamics of snow crab in the southern Gulf of St. Lawrence using a stage-structured discrete-time population model," Ecological Modelling, Elsevier, vol. 511(C).
    • Handle: RePEc:eee:ecomod:v:511:y:2026:i:c:s0304380025003394
    DOI: 10.1016/j.ecolmodel.2025.111353
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    References listed on IDEAS

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    1. Olmos, Maxime & Cao, Jie & Thorson, James T. & Punt, André E. & Monnahan, Cole C. & Alglave, Baptiste & Szuwalski, Cody, 2023. "A step towards the integration of spatial dynamics in population dynamics models: Eastern Bering Sea snow crab as a case study," Ecological Modelling, Elsevier, vol. 485(C).
    2. Piou, Cyril & Berger, Uta & Hildenbrandt, Hanno & Grimm, Volker & Diele, Karen & D’Lima, Coralie, 2007. "Simulating cryptic movements of a mangrove crab: Recovery phenomena after small scale fishery," Ecological Modelling, Elsevier, vol. 205(1), pages 110-122.
    3. Ma, Hongguang & Townsend, Howard & Zhang, Xinsheng & Sigrist, Maddy & Christensen, Villy, 2010. "Using a fisheries ecosystem model with a water quality model to explore trophic and habitat impacts on a fisheries stock: A case study of the blue crab population in the Chesapeake Bay," Ecological Modelling, Elsevier, vol. 221(7), pages 997-1004.
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