caa a22 4500 606230092 CHVBK 20210128101212.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s10695-015-0064-7 doi (NATIONALLICENCE)springer-10.1007/s10695-015-0064-7 Circulating insulin-like growth factor I in juvenile chum salmon: relationship with growth rate and changes during downstream and coastal migration in northeastern Hokkaido, Japan [Elektronische Daten] [Nobuto Kaneko, Natsumi Taniyama, Yu Inatani, Yuta Nagano, Makoto Fujiwara, Mitsuru Torao, Yasuyuki Miyakoshi, Munetaka Shimizu] Chum salmon (Oncorhynchus keta) migrate to the ocean in their first spring, and growth during early marine life is critical for survival. We examined the validity of circulating IGF-I and muscle RNA/DNA ratio as indices of growth rate using individually tagged juvenile chum salmon fed or fasted for 10days. Serum IGF-I level was highly, positively correlated with individual growth rate. Muscle RNA/DNA ratio also showed a positive correlation, but its relation was not as high as that of IGF-I. We next measured these physiological parameters in chum salmon juveniles caught at river, estuary, port and nearshore of the northeastern Hokkaido, Japan, from May to June in 2013 and 2014, respectively. In both years, there was a trend that serum IGF-I levels were high in nearshore fish and low in river/estuarine fish in June. In contrast, muscle RNA/DNA ratio showed no clear temporal and spatial patterns. The present study shows that circulating IGF-I can be used as a growth index in juvenile chum salmon. Monitoring growth status using serum IGF-I suggests that growth of juvenile chum salmon in the survey area was activated when they left the coast. Springer Science+Business Media Dordrecht, 2015 Chum salmon nationallicence Juvenile nationallicence Migration nationallicence Growth rate nationallicence RNA/DNA ratio nationallicence Insulin-like growth factor I nationallicence Kaneko Nobuto Faculty of Fisheries Sciences, Hokkaido University, 3-1-1 Minato, 041-8611, Hakodate, Hokkaido, Japan aut Taniyama Natsumi Faculty of Fisheries Sciences, Hokkaido University, 3-1-1 Minato, 041-8611, Hakodate, Hokkaido, Japan aut Inatani Yu Faculty of Fisheries Sciences, Hokkaido University, 3-1-1 Minato, 041-8611, Hakodate, Hokkaido, Japan aut Nagano Yuta Faculty of Fisheries Sciences, Hokkaido University, 3-1-1 Minato, 041-8611, Hakodate, Hokkaido, Japan aut Fujiwara Makoto Salmon and Freshwater Fisheries Research Institute, Hokkaido Research Organization, 3-373 Kitakashiwagi, 061-1433, Eniwa, Hokkaido, Japan aut Torao Mitsuru Salmon and Freshwater Fisheries Research Institute, Hokkaido Research Organization, 3-373 Kitakashiwagi, 061-1433, Eniwa, Hokkaido, Japan aut Miyakoshi Yasuyuki Salmon and Freshwater Fisheries Research Institute, Hokkaido Research Organization, 3-373 Kitakashiwagi, 061-1433, Eniwa, Hokkaido, Japan aut Shimizu Munetaka Faculty of Fisheries Sciences, Hokkaido University, 3-1-1 Minato, 041-8611, Hakodate, Hokkaido, Japan aut Fish Physiology and Biochemistry Springer Netherlands 41/4(2015-08-01), 991-1003 0920-1742 41:4<991 2015 41 10695 https://doi.org/10.1007/s10695-015-0064-7 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10695-015-0064-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kaneko Nobuto Faculty of Fisheries Sciences, Hokkaido University, 3-1-1 Minato, 041-8611, Hakodate, Hokkaido, Japan aut NATIONALLICENCE 700 1- Taniyama Natsumi Faculty of Fisheries Sciences, Hokkaido University, 3-1-1 Minato, 041-8611, Hakodate, Hokkaido, Japan aut NATIONALLICENCE 700 1- Inatani Yu Faculty of Fisheries Sciences, Hokkaido University, 3-1-1 Minato, 041-8611, Hakodate, Hokkaido, Japan aut NATIONALLICENCE 700 1- Nagano Yuta Faculty of Fisheries Sciences, Hokkaido University, 3-1-1 Minato, 041-8611, Hakodate, Hokkaido, Japan aut NATIONALLICENCE 700 1- Fujiwara Makoto Salmon and Freshwater Fisheries Research Institute, Hokkaido Research Organization, 3-373 Kitakashiwagi, 061-1433, Eniwa, Hokkaido, Japan aut NATIONALLICENCE 700 1- Torao Mitsuru Salmon and Freshwater Fisheries Research Institute, Hokkaido Research Organization, 3-373 Kitakashiwagi, 061-1433, Eniwa, Hokkaido, Japan aut NATIONALLICENCE 700 1- Miyakoshi Yasuyuki Salmon and Freshwater Fisheries Research Institute, Hokkaido Research Organization, 3-373 Kitakashiwagi, 061-1433, Eniwa, Hokkaido, Japan aut NATIONALLICENCE 700 1- Shimizu Munetaka Faculty of Fisheries Sciences, Hokkaido University, 3-1-1 Minato, 041-8611, Hakodate, Hokkaido, Japan aut NATIONALLICENCE 773 0- Fish Physiology and Biochemistry Springer Netherlands 41/4(2015-08-01), 991-1003 0920-1742 41:4<991 2015 41 10695