نوع مقاله : مقاله پژوهشی
1 مرکز تکثیر و بازسازی ذخایر ماهیان دریایی شادروان دکتر یوسف پور، سیاهکل، ایران
2 گروه شیلات، دانشکده منابع طبیعی، دانشگاه گیلان، صومعه سرا، ایران، صندوق پستی: 1144
عنوان مقاله [English]
This study was conducted to determine the morphometric and meristic parameters of female Asp × male Kutum (Leuciscus aspius ♀ × Rutilus frisii ♂) hybrid and its comparison with the parents.Fish were produced from artificial reproduction of female Asp and male Kutum in April 2012.For this purpose, fifty-four fish were randomly caught and 16 morphometric characters and 6 meristic characters were evaluated for the samples and the desired parameters were compared between hybrid and parents according to available literatures. The results showed that mean total length, standard length and fork length in this fish were 22.80 ± 0.51, 18.55 ± 0.49 and 20.36 ± 0.46 cm, respectively. Also, mean of head length, head width, eye diameter, inter orbital distance, maximum body height, dorsal fin length, pectoral fin length, ventral fin length, anal fin length, caudal peduncle length, caudal peduncle height, dorsal-pectoral fin distance, dorsal-anal fin distance were measured as 4.46 ± 0.08, 2.11± 0.05, 0.96 ± 0.02, 1.06 ± 0.0 3, 3.95 ± 0.12, 3.25 ± 0.08, 3.27 ± 0.09, 2.62 ± 0.08, 2.38 ± 0.06, 4.28 ± 0.08, 1.59 ± 0.06, 5.71 ± 0.14, 5.41 ± 0.16 cm, respectively. In this fish, mean number of scales on lateral line, scales above the lateral line, scales below the lateral line, branched rays of dorsal and anal fin, soft rays of dorsal fin and soft rays of anal fin were obtained as 60-68, 10, 5, 2, 9 and 10-11, respectively. Also, the most number of pharyngeal teeth was belonged to the formula 5.1-1.5 and 5.2-1.5, each with frequency 23.53 %. In general, results of the present study showed that this hybrid is not as same as with the parents in terms of morphometric parameters and especially meristic, and these are intermediate and even different characteristics.