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Predictions from simple predator-prey theory about impacts of harvesting forage fishes

Author

Listed:
  • Walters, Carl
  • Christensen, Villy
  • Fulton, Beth
  • Smith, Anthony D.M.
  • Hilborn, Ray

Abstract

Simple predator-prey models make widely divergent predictions about impact on piscivores of harvesting forage fish species, depending on structural assumptions about the fine-scale spatial structure of trophic interactions (presence or absence of foraging arena structure in prey availability) and about limitation in predator or prey recruitment due to foraging and habitat restrictions on early juvenile survival. This sensitivity to structural assumptions warns us about possible mistakes that can arise in much more complex and realistic models, where we have to make equivalent assumptions. Recruitment limitation implies risk of depensatory impact on forage species as fishing rate on these species increases, with attendant risk of development of predator-prey cycles and strong responses to relatively small changes in basic forage fish productivity due to environmental factors.

Suggested Citation

  • Walters, Carl & Christensen, Villy & Fulton, Beth & Smith, Anthony D.M. & Hilborn, Ray, 2016. "Predictions from simple predator-prey theory about impacts of harvesting forage fishes," Ecological Modelling, Elsevier, vol. 337(C), pages 272-280.
    • Handle: RePEc:eee:ecomod:v:337:y:2016:i:c:p:272-280
    DOI: 10.1016/j.ecolmodel.2016.07.014
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    References listed on IDEAS

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    1. Salcido-Guevara, Luis A. & Arreguín-Sánchez, Francisco, 2014. "Effects of biomass changes in the supply–demand balance of energy in aquatic food webs," Ecological Modelling, Elsevier, vol. 276(C), pages 64-79.
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    Cited by:

    1. Kaplan, Isaac C. & Koehn, Laura E. & Hodgson, Emma E. & Marshall, Kristin N. & Essington, Timothy E., 2017. "Modeling food web effects of low sardine and anchovy abundance in the California Current," Ecological Modelling, Elsevier, vol. 359(C), pages 1-24.
    2. Sk Golam Mortoja & Prabir Panja & Shyamal Kumar Mondal, 2023. "Stability Analysis of Plankton–Fish Dynamics with Cannibalism Effect and Proportionate Harvesting on Fish," Mathematics, MDPI, vol. 11(13), pages 1-37, July.
    3. Anjana Das & M. Pal, 2019. "Theoretical Analysis of an Imprecise Prey-Predator Model with Harvesting and Optimal Control," Journal of Optimization, Hindawi, vol. 2019, pages 1-12, January.

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