Examination of Behavioral Traits of Monocultures and Polycultures of Two Different Trout Species (Oncorhynchus mykiss, Salmo trutta ssp.) at Different Ratios Depending on Various Factors

: The present study aimed to determine both the effects of monocultures rainbow trout (R) and brown (B) polycultures (R 75%-B 25%; R 66%-B 34% 50%-B 50%) on behavior. In study, area used vertically by fish in tank, mobility rate tendency eating as soon they were fed, whether test feed, interspecies feed competition, time start take first duration consumption have been considered behavioral evaluation criteria. monitored with a camera their Considering all criteria, best polyculture was determined 34%. Brown found be more mobile exhibit relaxed behavior compared other groups polyculture. addition, competition mostly encountered this group. As result, which two different species monocultured treated at ratios, main factor causing change stocking rates each same tank. Different applied caused unpredictable changes species. ratio considerable affecting final product for aquaculture.