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January 8, 2025FishesOpen Access

Community Dynamics of Fish Larvae in Coastal Zhejiang: Seasonal Variations in Spatiotemporal Distribution and Environmental Driving Factors

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Authors

PZPeng ZhaoRJRijin JiangQLQiqun Li

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Overview

Ecological survey uncovers seasonal shifts and hydrographic drivers of fish larvae distributions, highlighting critical spawning zones for marine conservation.

Key Points

  • To assess seasonal and spatial variations in fish larvae community structure and determine the environmental drivers governing larval distribution in offshore marine waters.
  • Sampled N=24,232 fish larvae using large plankton nets across four seasonal surveys in April 2022, November 2022, February 2023, and July 2023 in coastal Zhejiang waters.
  • Characterized community structure and spatial heterogeneity using cluster analysis, and evaluated environmental drivers using Mantel tests and canonical correspondence analysis (CCA).
  • Identified 93 species predominantly composed of warm-temperate and warm-water taxa, displaying peak larval abundance in summer with seasonal dominant species turnover among Larimichthys croceus, Sebastiscus marmoratus, Lateolabrax japonicus, and Odontamblyopus lacepedii.
  • Observed seasonal spatial shifts, with larval aggregation concentrated around bays and estuaries during spring, summer, and autumn, shifting toward motor trawler fishery boundaries in winter.
  • Identified seawater temperature and salinity as the primary environmental determinants of larval distribution, with additional influence from dissolved oxygen, chlorophyll-a, turbidity, and water depth.

Cite This Study

Zhao et al. (2025) studied this question.

synapsesocial.com/papers/6aa6a08d4bcbe4818eeeb9d4https://doi.org/10.3390/fishes10010024
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