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http://dx.doi.org/10.11626/KJEB.2013.31.2.165

Distribution Patterns of Calanoid Copepods along the Seomjin River Estuary in Southern Korea during Summer  

Park, Eun-Ok (Department of Life Science, Hanyang University)
Rahman, Muhammad Shafiqur (Faculty of Marine Technology, Chonnam National University)
Seo, Min Ho (Korea Institute of Ocean Science and Technology/South Sea Institute)
Kim, Jong Jyu (Faculty of Marine Technology, Chonnam National University)
Soh, Ho Young (Faculty of Marine Technology, Chonnam National University)
Publication Information
Korean Journal of Environmental Biology / v.31, no.2, 2013 , pp. 165-171 More about this Journal
Abstract
The distribution patterns of estuarine copepods were investigated in the Seomjin River estuary of southern Korea after heavy rains in August 2006. Tidal influence extended 16 km from the estuary mouth. Each estuary zone (Oligohaline salinity <5, mesohaline salinity 5~18, polyhaline salinity >18) changed within a range of about 5~6 km between low and high tides. A total of ten species were recorded, of which Pseudodiaptomus koreanus, Sinocalanus tenellus, and Tortanus dextrilobatus were predominant in the oligohaline zone; Acartia ohtsukai and Acartia forticrusa in the mesohaline zone; and A. erythraea, Calanus sinicus, Centropages dorsispinatus, Labidocera rotunda and Paracalanus parvus s. l. in the polyhaline zone. Their density was fastly reduced in the other zones. In particular, the oligohaline species migrated and aggregated into deeper water during ebb tides in order to retain their populations, while the same tendency was weaker for polyhaline species, suggesting that evolutionary traits primarily control population retention behaviors in estuarine environments.
Keywords
estuarine copepods; Korean estuary; heavy rains; salinity gradients; tides;
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