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Iranian Journal of Ichthyology، جلد ۱۲، شماره ۱، صفحات ۰-۰
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عنوان انگلیسی Biological traits of the endemic Kiabi Loach (<i>Oxynoemacheilus kiabii</i>) from western Iran
چکیده انگلیسی مقاله Despite describing Kiabi loach (Oxynoemacheilus kiabii), lack of information on biological characteristics is evident in the scientific literature. This study reports for the first time some information about life history traits of endemic O. kiabii, based on 205 specimens collected from the Gamasiab River, Hamedan Province, in western Iran from March to June 2011. The species was found at a limited number of sites within the drainage system, suggesting restricted population support. The maximum age was 3+ years for both sexes. The males ranged from 32 to 63 mm and 0.37 to 3.63 g, and females from 34 to 71mm and 0.43 to 4.11g. Length-weight relationship (LWR) was estimated as TL= 0.0107×TW3.10 for males, TL= 0.0173×TW2.80 for females, and TL= 0.0146×TW2.91 for sexes combined, implying positive allometric growth for males and negative for females and population. The sex ratio was 1:1.50 in favor of females. The spawning of O. kiabii in the Gamasiab River took place from April to late May. At the beginning of the reproduction period, the average GSI values were 2.05±0.90 for males and 10.40 ± 3.44 for females. The absolute and relative fecundity were 507.23±345.19 (S.D.) eggs/female and 283.89±79.30 (S.D.) eggs/g of body weight, respectively. Ova diameter ranged from 0.45 to 1.15 mm with a mean value of 0.70±0.13 (S.D.). There was a positive significant effect of fish size on both absolute and relative fecundities, and diameter of oocytes as well. Considering the results, the given information on the species is unique and important for conservation of species and the biodiversity as well.
کلیدواژه‌های انگلیسی مقاله Oxynoemacheilus kiabii,Age,Growth,Reproduction,Gamasiab River,Iran.
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نشانی اینترنتی http://ijichthyol.org/index.php/iji/article/view/1034
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