Liangliang HUANG, Delian HUANG, Zhiqiang WU, Bin KANG, Zhongbing CHEN

Temporal Variation of Fish Diversity and Assemblages and their Associations to Environmental Variables in the Mangrove of Qinzhou Harbor, Guangxi Province, China

The composition and temporal variation of fish assemblages were investigated in the mangrove of Qinzhou Harbor, Guangxi Province, China from October 2011 to September 2012. A total of 67 fish species belonging to 57 genera, 32 families and 12 orders were collected. The Gobiidae (23.9%) were the most species-rich families, and the dominant species were Acentrogobius viridipunctatus and Bostrychus sinensis. Species richness, total abundance, total biomass and individual species abundance or biomass for the numerically abundant fish species were significantly different seasonally, such as abundance and biomass for A. viridipunctatus, B. sinensis, Glossogobius giuris, Acanthogobius hasta, Gerres limbatus, Sillago sihama, Lateolabrax japonicas, Moolgarda cunnesius and Leiognathus brevirostris. The Non-metric Multidimensional Scalings (NMDS) ordination showed a clear separation of fish samples with an anticlockwise direction for different sampling months, which indicated a gradual change in fish assemblages over the months. Results of two-way ANOVA showed fish species richness, total abundance and total biomass were significantly affected by tidal type in the mangrove of Qinzhou Harbor. However, NMDS ordination showed an unclear separation of fish samples between spring tide and neap tide. One-way ANOSIM further revealed no significant effects of tidal type.

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