Divergent patterns of global tuna fishing fleet dynamics among different continents
Abstract The sustainability of tuna fisheries relies on effective management measures and understanding the various regional patterns of fleet dynamics is helpful to inform the international collaborations of fisheries management at the global scale. In this study, we proposed a novel method based o...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-08-01
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| Series: | npj Ocean Sustainability |
| Online Access: | https://doi.org/10.1038/s44183-025-00150-5 |
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| Summary: | Abstract The sustainability of tuna fisheries relies on effective management measures and understanding the various regional patterns of fleet dynamics is helpful to inform the international collaborations of fisheries management at the global scale. In this study, we proposed a novel method based on the transferability of classification models to compare the similarity of tuna fishing fleets across different continents. Both static and dynamic features of 1450 tuna fishing vessels were extracted from 36,048,449 AIS data across Africa, Asia, Europe, North America, Oceania, and South America, as well as a two-stage experiment was designed to test the transferability of classification model between different continents by using all features as well as only using the dynamic features. Results indicated that, when considering all features, the transferability of classification models were relatively high across continents. When only considering the dynamic features, the classification models trained by European and North American fleets are applicable to fleets from most other continents but not vice versa, suggesting that the European and North American fleets exhibited more diverse and generic dynamics than the other continents. In contrast, the model trained by African fleets performed poorly when applied to vessel classification for the other continents, highlighting the African fleet exhibited more special and specific dynamics. Additionally, the model transferability was high between the Asian and Oceanian fleets, implying strong similarity of their fleet dynamics. These findings may be linked to the developmental history of tuna fisheries across continents, emphasizing the importance of social and economic factors in determining the dynamics of global tuna fishing fleets. |
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| ISSN: | 2731-426X |