MEAT YIELD OF MALE AND FEMALE RAINBOW TROUT (Oncorhynchus mykiss) UNDER TWO REARING SYSTEMS IN TWO DIFFERENT REGION

An experiment was conducted with the intent to compare the meat yield of male/female fishes reared under two different systems (Cage and Pond) placed in two different region. For this purpose the body weight, fillet weight, edible part weight, non-edible part of fish, abdominal fat weight and liver weight of the male and female rainbow trout (Oncorhynchus mykiss), which is cultivated Kayseri-Pınarbası, Kahramanmaraş-Kalecik dams and Kayseri-Pınarbası and Kahramanmaras-Tekir concrete ponds in Turkey were determined. Water temperature of Kayseri-Pınarbası, Kahramanmaraş-Kalecik dams and Kayseri-Pınarbası and Kahramanmaras-Tekir concrete ponds were 17.67, 15.13, 11.45 and 9.79 °C, respectively.

The results showed that body and fillet weight were lower in male fish reared in the concrete ponds. The highest body weight and fillet weight were observed in female fish for Kayseri-Pinarbası dam and pond rearing systems. Abdominal fat weight decreased in male fish reared all dam and pool in different regions. Non-edible part of fish were lower for male fish in Kayseri-Pınarbası concrete ponds, female fish in Kahramanmaraş-Kalecik cage, male and female fish in Kahramanmaras-Tekir concrete ponds..

The results suggest that male fish are reared either in ponds or cages could have a potential to decrease abdominal fat. Non-edible parts of fish also decrease at low water temperature conditions.

Keywords: Rainbow Trout, Oncorhynchus mykiss, Body Weight, Fillet Weight, Abdominal Fat, Edible-nonedible part of fish