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http://dx.doi.org/10.5657/kfas.2010.43.5.510

Seasonal Variation of Fish Assemblages on Jangbong Tidal Flat, Incheon, Korea  

Seo, In-Soo (Marine Eco-Technology Institute Co., Ltd.)
Hong, Jae-Sang (Department of Oceanography, Inha University)
Publication Information
Korean Journal of Fisheries and Aquatic Sciences / v.43, no.5, 2010 , pp. 510-520 More about this Journal
Abstract
This study investigated the community structure and seasonal variation of the fish assemblages on Jangbong tidal flat, Incheon, Korea. Fish were collected monthly using a small otter trawl from November 1999 to January 2001. Thirty-six fish species were recorded, with a mean density of 185 individuals and biomass of 2,594.3 gWWt. The most abundant species by number were Johnius grypotus (23.7%), Acanthogobius hasta (17.8%), and Cynoglossus joyneri (10.7%), while the dominant species by catch weight were Acanthogobius hasta (21.2%), Sebastes schlegeli (16.2%), J. grypotus (14.0%), and C. joyneri (10.8%). Cluster analysis and non-metric multi-dimensional scaling (nMDS) were applied to assess the seasonal fluctuation in the fish assemblages. Based on the result of the cluster analysis and nMDS ordination, the faunal group could be divided into cold- and warm-water specialist groups. The cold-water specialists included A. hasta, Acanthogobius luridus, Triaenopogon barbatus, Tridentiger trigonocephalus, and Liza haematocheila. The warm-water specialists were J. grypotus, C. joyneri, S. schlegeli, and Hexagrammos otakii. In conclusion, the community structure showed a distinct seasonal trend, which seemed to be related to the seasonal fluctuations in water temperature.
Keywords
Fish assemblages; Seasonal variation; Community structure; Tidal flat; Jangbong Island;
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