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Uncertainty in Ecosystem Model Parameters Slows Progress in Fishery Management

Strategic Insights

— 2 min read

Researchers from the Polar Research Institute of China have investigated the impacts of uncertainty in ecosystem model parameters on fisheries management in the Southern Ocean. The study used the OSMOSE ecosystem model for the Cooperation Sea, a region important for fisheries and conservation. The results showed that the community in the Cooperation Sea was most sensitive to changes in the larval mortality parameter of mesopelagic fishes. The biomasses of large-sized, long-lived species such as toothfishes and Adelie penguins were most sensitive to parameters specific to these species groups.

Key Takeaways:

  • The study found that the community in the Cooperation Sea was most sensitive to changes in the larval mortality parameter of mesopelagic fishes.
  • Monte Carlo simulations indicated that community dynamics were more sensitive to the larval and natural mortality parameters than to other parameters.
  • The biomasses of large-sized, long-lived species such as toothfishes and Adelie penguins were most sensitive to parameters specific to these species groups.
  • The study found that by providing a comprehensive analysis of uncertainty in the parameters estimated during the calibration process, it can serve as a valuable basis for similar ecosystem modelling efforts in the Southern Ocean.
  • The research was based on an operational ecosystem model for supporting ecosystem-based management in the Cooperation Sea.

Statistics:

  • The study used the OSMOSE ecosystem model for the Cooperation Sea, a region important for fisheries and conservation.
  • The researchers found that the biomasses of small-sized, short-lived species such as mesopelagic fishes and krill species were most sensitive to changes in the parameters specific to the predators of these species groups.
  • Monte Carlo simulations indicated that community dynamics were more sensitive to the larval and natural mortality parameters than to other parameters, by a factor of 2-3.
  • The study found that after gradually increasing the larval mortality and mortality parameters, the biomasses of Adelie penguin, seals and whales decreased, while the biomasses of mesopelagic fishes and Antarctic krill increased.

Sources:

  • Global Sensitivity and Uncertainty Analyses of an Ecosystem Model for Simulating Food Web Dynamics In the Cooperation Sea, Southern Ocean. Fisheries Research, 2025;285.
  • Elsevier, Radarweg 29, 1043 Nx Amsterdam, Netherlands.
  • Polar Research Institute of China, Key Lab Polar Sci, Mnr, Shanghai, People's Republic of China.
  • NewsRx. Findings from Polar Research Institute of China in Fisheries Research Reported (Global Sensitivity and Uncertainty Analyses of an Ecosystem Model for Simulating Food Web Dynamics In the Cooperation Sea, Southern Ocean). Life Science Weekly. May 13, 2025; p 1501.

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