Experimental mortalities of chum salmon, Oncorhynchus keta, caused by bacterial kidney disease in fresh water and seawater.
Sakai, M., Goma, Y., Seto, N., Atsuta, S. and Kobayashi, M.
Bull. Eur. Ass. Fish Pathol.
The suceptibility to R. salmoninarum was examined in chum salmon cultured in fresh water and sea-water, and in those transferred from fresh to sea-water. The most susceptible fish were chum salmon cultured in sea-water, death by R. salmoninarum was 100%. The chum salmon transferred to sea-water also exhibited high mortality (100% in 107 cell injected group and 96.6% in 106 cell injected group). The least mortality occurred in fish cultured in fresh water (100% in 107 cell injected group and 41.4% in 106 cell injected group). These results show that the sea-water environment increases the susceptibility of chum salmon to BKD.