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A Catch Community Diversity Analysis of Purse Seine in the Tropical Western and Central Pacific Ocean

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Pubblicato in:Fishes vol. 10, no. 4 (2025), p. 164
Autore principale: Jiaojiao, Fei
Altri autori: Zhang, Jian, Wang, Xiao, Wu, Yuntao, Teng Yuxiu
Pubblicazione:
MDPI AG
Soggetti:
Pacific Ocean
Nitrates
Vertical migrations
Marine fisheries
Fish
Fishing
Marine fish
Correlation analysis
Species diversity
Fishery data
Biodiversity
Swimming
Data processing
Marine ecosystems
Fisheries
Community composition
Ecosystems
Tuna
Purse seining
Seining
Climate change
Purse seines
Ocean temperature
Statistical analysis
Environmental factors
Fish aggregating devices
Vertical migration
Commercial fishing
Salinity
Fisheries management
Thunnus albacares
Thunnus obesus
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Abstract:Epipelagic fish communities dominate fish assemblages and are an important part of marine ecosystems due to their high abundance, vertical migration behavior, and global distribution. Purse seine fisheries are key components of marine fisheries in the tropical Western and Central Pacific Ocean (WCPO), primarily targeting skipjack tuna (Katsuwonus pelamis, SKJ), yellowfin tuna (Thunnus albacares, YFT), and bigeye tuna (Thunnus obesus, BET). In this study, WCPO purse seine fishery data from 2014 to 2022, combined with environmental factor data, were used, and Mantel tests and correlation analysis were employed to analyze the diversity, fish coexistence mechanisms, and environmental responses of catch communities under the following two different fishing strategies: free–swimming schools (FSCs) and drifting fish aggregating devices (DFADs). Mantel tests indicated that nitrate (NO3−), the Oceanic Niño Index (ONI), and pH significantly impact the diversity of the FSCs community, whereas NO3− significantly affects the diversity of the DFADs community. Based on the correlation analysis results, in the FSCs community, yellowfin tuna was positively correlated with bigeye tuna, and yellowfin tuna was negatively correlated with skipjack tuna and black marlin (Istiompax indica, BLM). In the DFADs community, yellowfin tuna was only positively correlated with skipjack tuna and bigeye tuna. In addition, species with high correlations were also positively correlated. The results of this study provide a theoretical basis for the biodiversity conservation of catch communities under two different purse seine fishing strategies in the WCPO.
ISSN:2410-3888
DOI:10.3390/fishes10040164
Fonte:Biological Science Database