naa a22 4500 510753744 CHVBK 20180411083114.0 cr unu---uuuuu 180411e20130901xx s 000 0 eng 10.1007/s13131-013-0357-6 doi (NATIONALLICENCE)springer-10.1007/s13131-013-0357-6 Diel vertical migration of the copepod Calanus sinicus before and during formation of the Yellow Sea Cold Bottom Water in the Yellow Sea [Elektronische Daten] [Jung-Hoon Kang, MinHo Seo, Oh Kwon, Woong-Seo Kim] To understand the effects of the Yellow Sea Cold Bottom Water (YSCBW) on the diel vertical migration (DVM) of the copepod Calanus sinicus, we surveyed vertical distribution of C. sinicus at a fixed station in the Yellow Sea before (spring) and during (summer) formation of the YSCBW. Cold water (<10°C) was observed in the bottom layer when the water column was thermally stratified in summer, but the water column was thermally well-mixed in spring 2010. Samples were collected from five different layers at 3-h intervals using an opening-closing net. Adult females (1-155 ind./m3) showed a clear normal DVM pattern throughout the entire water column in spring, whereas adult males did not migrate. DVM of copepodite V (CV) individuals was not clear, but the maximum abundance of CI-CIV occurred consistently in the upper 10-20 m layer, where there was a high concentration of chlorophyll-a (Chl-a) (0.49-1.19 µg/L). In summer, weak DVM was limited to cold waters beneath the thermocline for adult females (<30 ind./m3), but not for adult males. The maximum abundance of CI-CIV also occurred consistently in the subsurface layer (20-40 m) together with high concentrations of Chl-a (0.81-2.36 µg/L). CV individuals (1-272 ind./m3) moved slightly upward nocturnally to the near-surface layer (10-20 m), where the average temperature was 25.74°C, but they were not found in the surface layer (0-10m; 28.31°C). These results indicate that the existence of the YSBCW affected food availability at depth and the vertical temperature distribution, leading to variation in the amplitude and shape of stage-specific vertical distributions (CI to adults) in C. sinicus before and during the formation of cold waters in the Yellow Sea during the study period. The Chinese Society of Oceanography and Springer-Verlag Berlin Heidelberg, 2013 Yellow Sea Cold Bottom Water (YSCBW) nationallicence copepod nationallicence Calanus sinicus nationallicence developmental stages nationallicence diel vertical migration (DVM) nationallicence Kang Jung-Hoon South Sea Environment Research Division, Korea Institute of Ocean Science & Technology (KIOST), 41 Jangmok1-gil, Jangmok-myon, 656-834, Geoje, Republic of Korea aut Seo MinHo South Sea Environment Research Division, Korea Institute of Ocean Science & Technology (KIOST), 41 Jangmok1-gil, Jangmok-myon, 656-834, Geoje, Republic of Korea aut Kwon Oh South Sea Environment Research Division, Korea Institute of Ocean Science & Technology (KIOST), 41 Jangmok1-gil, Jangmok-myon, 656-834, Geoje, Republic of Korea aut Kim Woong-Seo Deep-sea and Seabed Resources Research Division, KIOST, Ansan P.O. Box 29, 425-600, Seoul, Republic of Korea aut Acta Oceanologica Sinica Springer Berlin Heidelberg 32/9(2013-09-01), 99-106 0253-505X 32:9<99 2013 32 13131 https://doi.org/10.1007/s13131-013-0357-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s13131-013-0357-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kang Jung-Hoon South Sea Environment Research Division, Korea Institute of Ocean Science & Technology (KIOST), 41 Jangmok1-gil, Jangmok-myon, 656-834, Geoje, Republic of Korea aut NATIONALLICENCE 700 1- Seo MinHo South Sea Environment Research Division, Korea Institute of Ocean Science & Technology (KIOST), 41 Jangmok1-gil, Jangmok-myon, 656-834, Geoje, Republic of Korea aut NATIONALLICENCE 700 1- Kwon Oh South Sea Environment Research Division, Korea Institute of Ocean Science & Technology (KIOST), 41 Jangmok1-gil, Jangmok-myon, 656-834, Geoje, Republic of Korea aut NATIONALLICENCE 700 1- Kim Woong-Seo Deep-sea and Seabed Resources Research Division, KIOST, Ansan P.O. Box 29, 425-600, Seoul, Republic of Korea aut NATIONALLICENCE 773 0- Acta Oceanologica Sinica Springer Berlin Heidelberg 32/9(2013-09-01), 99-106 0253-505X 32:9<99 2013 32 13131 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer