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Seasonal Fluctuations and Species Composition of Fish Collected by Long-bag Stow Net in Nang-island, Yeosu

Seasonal fluctuation in abundance and species composition of fish in coastal waters off Nang island were investigated using seasonal samples collected by long-bag stow net in 2017. A total 10,208 fish were sampled and classified into 37 species, 26 families, and 9 orders. The dominant species were Engraulis japonicus (4,886 individuals, 47.9%), Pennahia argentata (842 individuals, 8.2%), and Ilisha elongata (369 individuals, 3.6%). The diversity index was the highest in May (H ′ = 3.23) and the lowest in November (H ′ = 1.24). The dominance index was the highest in November (D = 78.7%) and the lowest in May (D = 22.4%).