2016년 한국 근해 난바다곤쟁이류의 시·공간적 분포
Spatio-Temporal Distribution of Euphausiids in Korean Waters in 2016
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The distribution and abundance of euphausiids were investigated in Korean waters in 2016. Euphausiids were sampledwith a Bongo net. A CTD (Sea Bird Electronics 9 plus) measured the water temperature and salinity whilesampling. Mean water temperature ranged from 4.2-31.0ºC. The highest temperatures occur in September and lowesttemperatures in February. The mean water salinity ranged from 27.9-34.8 psu, with the highest salinities in March andlowest in September. Euphausiid species in group W consisted of four species. Among the euphausiid species, Euphausiapacifica was the dominant species with peak densities in September. The E. pacifica from group W was distributedin the bottom cold water during summer when a thermocline was formed. Five euphausiid species occurredin group S. E. pacifica and E. nana were the dominant species. In group S, E. nana was located in the warm and salineTsushima Warm Current, a branch of the influential Kuroshio Current. Five euphausiid species occurred in group E. E. pacifica and T. longipes were the dominant species. In group E, E. pacifica and T. longipes were distributed in thedeep and cold waters, these species prefer low water temperatures and perform vertical migration. The distribution ofeuphausiids in Korean waters were highly influenced by mass water characteristics, such as temperature and salinity.
Abstract
The distribution and abundance of euphausiids were investigated in Korean waters in 2016. Euphausiids were sampledwith a Bongo net. A CTD (Sea Bird Electronics 9 plus) measured the water temperature and salinity whilesampling. Mean water temperature ranged from 4.2-31.0ºC. The highest temperatures occur in September and lowesttemperatures in February. The mean water salinity ranged from 27.9-34.8 psu, with the highest salinities in March andlowest in September. Euphausiid species in group W consisted of four species. Among the euphausiid species, Euphausiapacifica was the dominant species with peak densities in September. The E. pacifica from group W was distributedin the bottom cold water during summer when a thermocline was formed. Five euphausiid species occurredin group S. E. pacifica and E. nana were the dominant species. In group S, E. nana was located in the warm and salineTsushima Warm Current, a branch of the influential Kuroshio Current. Five euphausiid species occurred in group E. E. pacifica and T. longipes were the dominant species. In group E, E. pacifica and T. longipes were distributed in thedeep and cold waters, these species prefer low water temperatures and perform vertical migration. The distribution ofeuphausiids in Korean waters were highly influenced by mass water characteristics, such as temperature and salinity.
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