DETERMINATION OF LENGTH, WEIGHT AND HEALTH STATUS FACTOR IN RAINBOW TROUT (Oncorhynchus mykiss WALBAUM, 1972) CULTIVATED IN THE FISH FARM IN ISTOG (PEJE REGION-KOSOVO)

Length, weight and health status factors were determined in rainbow trout obtained from aquaculture. The research included 136 individuals with different lengths and weights, divided into three groups. The first group included 25 individuals with a weight of >100 g, the second group 150 individuals with a weight of >150 g, and the third group 59 individuals with a weight of >200 g. The average value of the morphometric parameters was determined based on the number of individuals analysed for each group. In the first group, the average total length (TL) was 22.6 cm; in the second group, it was 24.8 cm; and in the third group, it was 27.3 cm. The average fork length (FL) in the first group was 21.1 cm, in the second group 23 cm, and in the third group 25.5 cm. The average value of body weight in the first group was 126 g; in the second group, it was 176.8 g; and in the third group, it was 227.6 g. In the group of fish weighing more than 100 g, the average value of the health status factor was 1.27; in the group of fish weighing more than 150 g, 1.36; and in the group of fish weighing more than 200 g, 1.41. This study provides us for the first time with basic information on length, weight and health status factors for rainbow trout cultured on the Istog fish farm, which may be useful for fisheries management on other farms in Kosovo and beyond.