The percentage of total nitrogen excreted (ammonia-N and urea-N) as urea-N was
lowest in 0x salinity for channel catfish and goldfish but was lowest in 9x for striped
bass, rainbow trout, and brown trout (Table 4). That of Gulf sturgeon did not change in
response to salinity. Brown trout and rainbow trout had the lowest percent urea-N and
were also most affected by changes in salinity.