Comparative analysis of morphometric parameters and conditions factors of grayling 3+ (Thymallus thymallus) from the Krušnica River and the Martin Brod fish farm

Subha Avdić; Azra Bakrač; Radoslav Dekić; Igor Milunović

Comparative analysis of morphometric parameters and conditions factors of grayling 3+ (Thymallus thymallus) from the Krušnica River and the Martin Brod fish farm

Authors
Subha Avdić, Azra Bakrač, Radoslav Dekić, Igor Milunović

Abstract
The morphometric characteristics of fish are used to determine the difference between fish populations, and the fitness factor is one of the ways to monitor the influence of environmental factors on the general condition of fish. The aim of this study was to determine the morphometric characteristics and the fitness factor of graylings in their natural habitat and in fish farms. In this paper, a comparative analysis of morphometric characteristics and fitness factors of grayling individuals aged 3+ from the Krušnica River and the Martin Brod fish farm was performed. A total of 134 individuals aged 3+ were caught, ie 34 individuals from the Krušnica River and 100 individuals from the Martin Brod fish farm. The following parameters were analyzed in all individuals: total length, total length, weight, age structure, sex and fitness factor. Based on the obtained results, statistically significant differences were recorded for the total length, standard length, weight and fitness factor. In the Krušnica River, out of a total of 34 grayling, 14 grayling were males and 20 were females, while in the Martin Brod fish farm, 81 females and 19 males were determined.

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