Habitat use and suitability index of Capoeta Capoeta gracilis, in the Kalarud River

In order to protection of riverine ecosystems’ biodiversity, understanding the biological requirements of aquatics is necessary. Therefore, this study was conducted to investigate the habitat features of Capoeta Capoeta gracilisin its distribution range within the Kalarud River using Habsel software. Habitat use, availability, and selection were calculated over the range of each environmental variable. .To study the habitat characteristics of this species, its abundance and 5 habitat variables, depth (cm), river width (m), flow velocity (m/s), average diameter of substrate stones (cm) and substrate index (%SI) at 6 stations from the downstream to upstream were measured. Based on the results, the habitat characteristics of Capoeta Capoeta gracilisis regions with high-velocity, rock bed, with higher width and depth. Results of this research provid the required information habitat characteristics of this native species for use in management programs and aquaculture conservation.