Biochemical differences between hatchery-reared and wild masu salmon Oncorhynchus masou smolts
2002
"Misaka, N. (Hokkaido. Fish Hatchery, Eniwa (Japan)) | Mizuno, S. | Shimoda, K. | Sasaki, Y. | Naito, K. | Ando, D. | Kitamura, T. | Kasahara, N. "
"Comparative biochemical investigation between hatchery-reared and wild masu salmon Oncorhynchus masou smolts was carried out to estimate their suitability for ocean ranching. Triglyceride content in hatchery-reared smolts were lower than that in wild smolts. RNA/DNA ratios and protein content of hatchery-reared smolts before releasing, which showed a lower specific growth rate than wild smolts, had decreased in the spring, even though RNA/DNA ratios and protein content had increased in wild smolts. Hatchery-reared smolts under different feeding conditions indicated that the differences in RNA/DNA ratios and protein content closely linked their specific growth rates during the spring. These results suggest that the energy store of hatchery-reared smolts was lower than that of wild smolts."
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