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http://dx.doi.org/10.3796/KSFT.2012.48.4.452

Seasonal variations in species composition by the stow nets and the stow net on boat fisheries in the Han River Estuary, Korea  

Oh, Taeg Yun (Fisheries Resources Research Division, National Fisheries Research & Development Institute)
Lee, Jae Bong (Dokdo Fisheries Research Center, ESFRI)
Seo, Young Il (Fisheries Resources Research Division, National Fisheries Research & Development Institute)
Lee, Jong Hee (Fisheries Resources Research Division, National Fisheries Research & Development Institute)
Choi, Jung Hwa (Fisheries Resources Research Division, National Fisheries Research & Development Institute)
Kim, Jung Yun (Fisheries Resources Research Division, National Fisheries Research & Development Institute)
Lee, Dong Woo (Fisheries Resources Research Division, National Fisheries Research & Development Institute)
Publication Information
Journal of the Korean Society of Fisheries and Ocean Technology / v.48, no.4, 2012 , pp. 452-468 More about this Journal
Abstract
Marine organisms were collected by the stow nets and the stow net on boat fisheries from April 2010 to November 2011 in the Han River Estuary and categorized as 126 species, 61 families, and 5 taxa. The species were consisted with 34 in Crustacea, 5 in Cephalopoda, 79 in Pisces, unidentified jellyfishes in Cnidaria, and Finless porpoise in Mammals. The major species were composed of fish and crustaceans in the Han River Estuary. The dominant species in Crustacea were Chinese ditch prawn (Palaemon gravieri), blue crab (Portunus trituberculatus), Ridgetail prawn (Exopalaemon carinicauda), and mantis crab (Oratosquilla oratoria), and those in Pisces were Korean anchovy (Coilia nasus), and Japanese grenadier anchovy (Coilia mystus). The length structures of the six dominant species have more than one mode in the Han River Estuary. It reflects that the species inhibit during a part of and/or whole lifetime in the Han River Estuary where they utilize as spawning and/or nursery grounds. Freshwater fishes were collected from station D where is the closest location to the Han River stream, and their appearances were well matched with the large amount of freshwater discharge due to flood periods. Principal components analysis (PCA) was carried out with species compositions and showed temporal and spatial differences by the variations of species.
Keywords
Species composition; Length structures; the Han River Estuary; Freshwater fishes; Principal components analysis (PCA);
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