황해 저층냉수 형성 전, 후 요각류 Calanus sinicus의 수직적 분포특성

Title
황해 저층냉수 형성 전, 후 요각류 Calanus sinicus의 수직적 분포특성
Alternative Title
Vertical distribution of the copepod Calanus sinicus before and after formation of Yellow Sea Bottom Cold Water (YSBCW) in the Yellow Sea
Author(s)
강정훈; 서민호; 권오윤; 김웅서
KIOST Author(s)
Kang, Jung Hoon(강정훈)
Alternative Author(s)
강정훈; 권오윤; 김웅서
Publication Year
2011-10-20
Abstract
To understand effects of the Yellow Sea Bottom Cold Water (YSBCW) on the vertical distribution of the copepod Calanus sinicus, we surveyed diel vertical migration (DVM) of C. sinicus at a fixed station in the Yellow Sea before and after formation of the YSBCW. Cold water (<10°C) was observed in the bottom layer when the water column was thermally stratified in summer, while the water column was thermally well-mixed in spring. Samples were collected from five different layers at 3 hour intervals with an opening-closing net. Identified developmental stages of C. sinicus were from copepodite I (CI) to adults (CVI). Adult females (1-155 inds.m-3) showed clear DVM through the whole water column in spring, whereas adult males did not migrate. DVM of CV was not clear, while CI-CIV showed maximum residence in the upper 10-20m layer with high concentration of chlorophyll-a (chl-a). Conversely, clear DVM was not found in adult females (< 30 inds.m-3) and adult males in summer. Maximum abundances of CI-CIV also occurred consistently in the subsurface layer (20-40m) with high concentration of chl-a. CV (1-272 inds.m-3) moved upward nocturnally to the near-surface layer (10-20m) with average temperature of 25.74°C, while it was not found in the surface layer (0-10m) with 28.31°C. These results indicated that existence of the YSBCW affected the vertical distribution of all developmental stages
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/28169
Bibliographic Citation
PICES 2011, pp.137, 2011
Publisher
North Pacific Marine Science Organization
Type
Conference
Language
English
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