Analysis of short-term and local scale variations in fish community structure in Dachen Island waters

Understanding the changes in community structure of fishery resources island reef waters is crucial for effective resource management, as these constitute a critical link maintaining sustainable development offshore resources. The study analyzed fish surrounding Dachen Island by using data collected during four voyage surveys conducted between September 2020 and April 2021. utilized co-occurrence network analysis, multiple regression trees, functional diversity analysis to investigate short-term local scale structure. results showed that adjacent can be categorized into two groups: annual stage-use species. species include Scoliodon laticaudus , Trichiurus lepturus Tetraodontidae others, which are used summer autumn stages bait migration. Additionally, Dasyatidae winter spring reproductive Furthermore, found habitats dominated nearshore rocky distant deep formed variation waters. integrated α-diversity provided basis understanding mechanisms biodiversity action. Our aims provide theoretical framework management strategies based on life cycle fish, serve reference prioritization key protection areas environments. Overall, study’s findings promote dynamics offer valuable insights restoration implementation marine ranching activities Island. Moreover, outcomes foundation appropriate conservation fisheries