شماره ركورد :
21616
عنوان به زبان ديگر :
Macroscopic and microscopic studies of annual ovarian maturation cycle of Shirbot Barbus grypus in Karoon
پديد آورندگان :
Dorostghoal M. نويسنده , Peyghan R. نويسنده , Papan F. نويسنده , Khalili L. نويسنده
از صفحه :
172
تا صفحه :
179
تعداد صفحه :
8
چكيده لاتين :
The aim of this investigation was to study macroscopic and microscopic structures of ovaries in Barbus grypus of Karoon river and their changes during annual maturation cycle. For this purpose, ]20 adult B. grypus with a mean weight of 835.0 to 1012.0 g, were caught from Karoon river and transferred alive to the laboratory. After biometrical studies, the weights and morphological appearances of gonads were recorded. Then, tissue samples from the anterior, middle and posterior portions of the gonad were excised and fixed in Bouinיs solution. For microscopical studies, 5 urn paraffin sections were prepared and stained with haematoxylin and eosin and periodic acid Schiff (PAS). Gonado-somatic indices, macroscopical and microscopical changes of ovaries were studied during different months of the year. The results showed that gonado-sornatic index ranged from 0.35 ± 0.080% in September to 2.25 ± 0.321% in June, and the maximum values were seen in June. Cyclic changes of ovarian maturation were divided into seven stages histologically. Ovarian maturation cycle in B. grypus began in late summer. Spawning period of B. grypus continued approximately from late April to early August, which indicated that B. grypus has a prolonged spawning season. Ovarian type of B. grypus was group synchronous with a capacity for multiple ovulations within a reproductive season.
شماره مدرك :
1205666
لينک به اين مدرک :
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