Document Type : Article
Authors
1 Ph.D. Student, Hormozgan University, Iran
2 Associate Professor in National Inland Water Aquaculture institute Anzali, Iran
3 Department of Marine Sciences, The Caspian Sea Basin Research Center, University of Guilan, Iran Associate Professor in Department of Fishery, Faculty Natural Resources, University of Guilan, Iran
4 Ph.D. Student of Aquatic Ecology, Faculty Natural Resources, University of Guilan, Iran
Abstract
This study carried out on 194 fish (Garra rufa) during the months of January to March at eight stations in Dinvar River located at Kermanshah province. During this study, 34 attributes and 11 traits count was measured geometric parameters and natural mortality and total amount 0.346, infinite length L∞=124.57 mm, growth factor K=0.29 and the length and weight of the exponential function of growth were calculated. The length-weight relationship was calculated for each season separately, which indicates isometric growth during summer and autumn and allometric growth during the winter and spring seasons. The length-weight relationship for the whole year was calculated aqual to W= 1/000095L2/97. Male to female sex ratio of 1: 1.44 were calculated for faster growth in males and natural selection is directed towards the elimination of larger samples. Results indicate that the Dinvar river is a good place for spawning and nursery to Brood fish. The data were confirmed by isolation of populations between the stations and it seems that fish populations of stations are panmictic. However, further studies confirm that these results depends on genetic traits, physiological and Osteology Lange populations.
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