Comparative production of salmo salar atlantic salmon and salmo trutta brown trout in a small nova scotia stream
Randall, R.G.; Claytor, R.R.; Chadwick, E.M.P.; Mortensen, E.
Proceedings of the Nova Scotian Institute of Science 39(3): 99-109
1989
Accession: 007135928
The production rate of juvenile Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) was estimated at a site in Mountain Brook, a small tributary of River Philip, Nova Scotia [Canada]. S. salar were usually more abundant than S. trutta, but growth rate of S. trutta was significantly greater. For both species, seasonal growth was restricted to a six month period (May to October). For nine sampling dates between June 1986 and June 1988 total salmonid biomass averaged 3.6 g m-2 (range 1.2-5.6 g m-2). Production rate was similar for both species; total production was 3.5 g m-2 y-1 from June 1986 to June 1987 and 5.9 g m-2 y-1 from June 1987 to June 1988. Although S. trutta are not native to eastern Canada, a naturalized population has become established in River Philip, and they are cohabiting successfully with native S. salar. Future studies on population interactions and possible range extensions of introduced S. trutta would be beneficial for the management of salmonids in eastern Canada.