연어 해수 순치 및 양식 기술개발을 위한 기초연구

Abstract

Salmon(Oncorhynchus keta) is a highly-preferred variety in the world, accounting for 4.2% of world aquatic products, and has high market stability due to the formation of an international market. Domestic salmon consumption has also increased by nearly three times over five years, showing a high growth trend. However, domestic salmon is highly dependent on imports. Therefore, in this study, in order to use it as basic data for increasing salmon resources through the aquaculture industry, the possibility of seawater acclimatization of salmon through tissue and hormone changes was investigated, and the cause of salmon death after seawater acclimatization was investigated. Salmon in the smolt period with a total length of 5cm is capable of acclimatization in seawater and due to the characteristics of salmon family fish, whose growth rate increases after acclimatization to seawater, it is expected to have sufficient economical efficiency compared to seawater acclimatization of salmon over 100g. However, if salmon under stress after the smolt period is exposed to a water temperature of 16°C or higher, cellular degeneration occurs and its function decreases, and the number of lymph in the blood decreases, which damages the immune system and becomes susceptible to disease infection. It should be maintained to maintain the homeostasis of the salmon.