Habitat characteristics of Brown trout (Salmo trutta Linnaeus, 1758) in tributaries of the Taleghan River

Document Type : Research Paper

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Abstract

This study was conducted in 2017 by sampling from 7 stations in the headwaters of the Taleghan River to study the habitat suitability of Brown trout, Salmo trutta. Sampling was carried out using an electrofishing device with three replications in each station. Eight environmental factors, including water temperature (°C), water depth (cm), river width (m), slope (degree), water velocity (m/s), average diameter of the dominant bedrock (cm), potamal width and elevations were measured. The values of suitability index of the studied factors in each station were determined and the arithmetic mean of the indices in all sampling stations was considered as the suitability index of that factor. The results showed that the most preferred temperature is in the range of 10-5-12°C, depth in 20-30cm, river width in of 2.5-3m, slope in 1.6-1.9, water velocity in 0.41-0.62m/s, elevation in 2250-300 m and average diameter of the dominant bedrock in 11-20cm, and the potamal width 1.8-3.6m were calculated. As a general conclusion, the Taleghan River had a moderate suitability for S. trutta.

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Iranian Scientific Fisheries Journal
Volume 30, Issue 5
January and February 2022
Pages 111-120

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