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http://dx.doi.org/10.5322/JES.2012.21.10.1275

Seasonal Variations of Fisheries Resources Composition in the Coastal Ecosystem of the Yongil Bay, Korea  

Lee, Jae Bong (Dokdo Fisheries Research Center, National Fisheries Research and Development Institute)
Shin, Young Jae (Fisheries Resources Research Division, National Fisheries Research and Development Institute)
Lee, Soo Jeong (Fisheries Resources Research Division, National Fisheries Research and Development Institute)
Lee, Jong Hee (Fisheries Resources Research Division, National Fisheries Research and Development Institute)
Choi, Young Min (East Sea Fisheries Research Institute, National Fisheries Research and Development Institute)
Lee, Dong Woo (Fisheries Resources Research Division, National Fisheries Research and Development Institute)
Kim, Sang Woo (East Sea Fisheries Research Institute, National Fisheries Research and Development Institute)
Yang, Jae Hyeong (Fisheries Resources Research Division, National Fisheries Research and Development Institute)
Publication Information
Journal of Environmental Science International / v.21, no.10, 2012 , pp. 1275-1286 More about this Journal
Abstract
Coastal marine ecosystem plays important role of spawning and nursery grounds for fisheries resources. Yongil Bay is one of major coastal marine ecosystems, which is located in the southwestern East Sea of Korea. Species composition and abundance of marine organism in the Yongil Bay were investigated by season from March to November 2009. Gill net and pot fisheries were used for survey of pelagic and demersal species composition, and collected 106 species, 67 families, and 7 taxa of fisheries resources from the coastal ecosystem. Species were included 2 species in Ascidiacea, 2 species in Bivalvia, 6 in Cephalopoda, 22 in Crustacea, 5 in Echinodermata, 12 in Gastropoda, and 57 in Pisces. Diversity indices (Shannon index, H') showed seasonal variation with low value of 2.11 in winter, and high value of 2.63 in autumn. Main dominant species were Asterias amurensis, Pleuronectes yokohamae, Siphonalia spadicea fuscolineata, Trachurus japonicas, Sillago japonica, Conger myriaster, Volutharpa ampullaceal, Engraulis japonicus, Asterina pectinifera, and Portunus (Portunus) sanguinolentus that were occupied over 71.5% of total individuals, and 52.9% of wet weight. Seasonal variations of fisheries resources composition were discussed on correlationships with those of environmental factors in the coastal ecosystem of the Yongil Bay in Korea. Those results from this study will provide scientific data and information to develop the ecosystem-based coastal fisheries assessment and management system in Korea.
Keywords
Seasonal variations; Fisheries resources composition; Coastal ecosystem; Yongil Bay; PCA;
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