A comparison of the survival and growth performance in rainbow trout (Oncorhynchus mykiss) and brown trout (Salmo trutta fario) fry

Abstract

The rainbow trout is an intensively cultured species because of its more cultivatable character than the 
brown trout. In this experiment, the brown trout culture did not expand due to low growth performance 
compared to that of the rainbow trout. This experiment was conducted in a commercial trout farm, Aegean 
Area (Turkey). Growth performances and survivals of rainbow and brown trouts from fry to fingerling were 
observed for 155 days. Growth performances, feed conversion rates and survivals were determined. The 
initial weights of the rainbow and brown trouts were 0.1 ± 0.01 g. Final weights were 26.5 ± 5.19 g and 12.97 ± 
2.74 g, respectively at the end of experiment. Survival and FCR of rainbow and brown trouts were 83.9 
and 80% ; 0.59 and 0.61 respectively. As a result, there is a similarity between these two trout species in 
point of survivals and FCR’s although growth performance of the rainbow trout was significantly better 
than that of the brown trout.