Evaluation of Habitat Suitability Index for Goby, Ponticola cyrius, in Tajan River (Shahid Rajai dam area to crossroad Takam)

Abdollahpour, Zeynab; Rahmani, Hossein; Abdoli, Asghar; Janikhalili, Khosrow

Volume 10, Issue 1 (Summer 2020) J. Aqua. Eco 2020, 10(1): 1-13 | Back to browse issues page

‎ 20.1001.1.23222751.1399.10.1.1.7

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Abdollahpour Z, Rahmani H, Abdoli A, Janikhalili K. Evaluation of Habitat Suitability Index for Goby, Ponticola cyrius, in Tajan River (Shahid Rajai dam area to crossroad Takam). J. Aqua. Eco 2020; 10 (1) :1-13
URL: http://jae.hormozgan.ac.ir/article-1-654-en.html

Evaluation of Habitat Suitability Index for Goby, Ponticola cyrius, in Tajan River (Shahid Rajai dam area to crossroad Takam)

Zeynab Abdollahpour

, Hossein Rahmani ^*

, Asghar Abdoli

, Khosrow Janikhalili

Abstract: (3271 Views)

In control of lands, the assemblage and determination of effective factors on survival are necessary. The management of habitat is based on speculation and becomes a failure without the information. This study was done to survey the habitat suitability index of the Kura goby (Ponticola cyrius) in the Tajan River. For this purpose, samples were taken during a month from December to January 2014, at 15 stations in Tajan River from the highest point accessible to Crossroads Takam, and then triggering samples were counted. The environmental factors such as temperature, dissolved oxygen, electrical conductivity, pH, width, depth, altitude, slope, diagonal of substrate stones, water velocity, type of cover, and the measure of shadow were recorded in each station. Specimens of fish were caught by electrofishing at each station and were counted. Habitat suitability index was calculated for each. The results showed that the second station (upstream part) is the most favorable habitat for Kura goby, and some parameters such as dissolved oxygen, total dissolved solids, and depth of the river have the key role in the high habitat suitability index of the second station. Also, vegetation cover of bushes and shrubs, 40 to 71 percent of shadow, and the cobblestone bed were observed in habitat selection of Kura goby. According to the results of this study and due to the lack of mobility and the presence of ventral fin, the desirable habitat for this species is rubble beds (diameter 15 cm) and the flow rate of water is less than 0.5 m/s.

Keywords: habitat suitability, environmental parameters, Tajan River, Ponticola cyrius

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