Sayede Amene Hossaini; Mohammad Forouhar Vajargah; Mohammad Javad Vesaghi
Abstract
Morphometric and meristic traits typically are used to identify the stocks. The aim of this study was to identify the biological status of Aphanius vladykovi in four regions: Dehcheshme River, Shalamzar Lake, Madar-o-Dokhtar Spring and Chehelgazi Spring. 20 samples in each region were used to biological ...
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Morphometric and meristic traits typically are used to identify the stocks. The aim of this study was to identify the biological status of Aphanius vladykovi in four regions: Dehcheshme River, Shalamzar Lake, Madar-o-Dokhtar Spring and Chehelgazi Spring. 20 samples in each region were used to biological assess and 23 morphological and 8 meristic characters were examined. The final data were normalized and analyzed with Excel and SAS software version 9.1 with Duncan analysis of variance and to determine the length-weight relationship was used W=aLb regression equation. Regression coefficients growth pattern, with Pauli applicable method showed fish growth in the Shalamzar region was allometric and in other regions was isometric. Also variance analysis of main components revealed that among the areas were observed significantly different at 5% level at characters of: the minimum height of the body, distance behind the dorsal fin, ventral and pectoral fin spacing, the base of the pectoral and ventral fins, diameter of the gill cover, distance from tip of snout to ventral fin, body weight, number of pectoral, anal and caudal fin rays, number of lateral line scales and the number of gill raker and filaments, that suggesting the possible impact of these features in distinguish the populations of this species.
Mohammad Javad Vesaghi; Aliasghar Khanipour; Masoud Sattari; Mohammad Forouhar Vajargah
Volume 5, Issue 2 , December 2016, , Pages 87-96
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 ...
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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.
