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Qualitative network model outputs and code: HIMI Patagonian toothfish fishery, stock and ecosystem responses to change

Created 23/06/2025

Updated 28/09/2025

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This dataset contains the supplementary data and code accompanying the publication: Ward, D., Hill, N., Melbourne-Thomas, J., Welsford, D., Arangio, R., McNeill, M., Wotherspoon, S., Ziegler, P., Corney, S. (2025) Exploring mechanisms of change in a Southern Ocean fishery with a co-produced network model, ICES Journal of Marine Science. The study aimed to elucidate likely responses of the system to change, and mechanisms by which environmental, ecological or fishery behavioural changes could affect catch rates and toothfish stocks in the Heard and McDonald Islands (HIMI) fishing area. In the study, we co-developed a set of 128 qualitative network models of the Heard and McDonald Islands (HIMI) Patagonian toothfish fishery–stock–ecosystem interactions system with knowledge holders from industry and science. These different model versions capture different possible configurations of interactions for which the sign of the effects (positive or negative) are unknown. For each model versions, we simulated 10,000 quantitative instances of the qualitative model. We analysed these model outputs to understand 1) mean qualitative responses of system components (nodes) in 8 test scenarios (press increases in environmental, fishery, or ecosystem nodes); 2) how ‘unknown’ effect signs affected qualitative responses of key nodes to change; and 3) relationships between responses and the strength of effects originating from nodes being perturbed. Please refer to Ward et al. (2025) for more detailed description of the methodology and findings, and the README file for description of data and code contained in this repository.

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Additional Info

Field Value
Title Qualitative network model outputs and code: HIMI Patagonian toothfish fishery, stock and ecosystem responses to change
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/efd1177b-966c-4b1e-a4ed-4048ebd1a78c
Contact Point
Australian Ocean Data Network
Delphi.Ward@csiro.au
Reference Period 01/03/2017 - 31/05/2021
Geospatial Coverage
Map data © OpenStreetMap contributors
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Data Portal Australian Oceans Data Network

Data Source

This dataset was originally found on Australian Oceans Data Network "Qualitative network model outputs and code: HIMI Patagonian toothfish fishery, stock and ecosystem responses to change". Please visit the source to access the original metadata of the dataset:
https://catalogue.aodn.org.au/geonetwork/srv/eng/csw/dataset/qualitative-network-model-outputs-and-code-himi-patagonian-toothfish-fishery-stock-and-ecosyste