histomorphometrical study of gonads in the endemic cyprinid fish, cyprinion tenuiradius heckel, 1847 (cypriniformes: cyprinidae)

نویسندگان

a. gholamifard

m. monsefi

h.r. esmaeili

چکیده

to describe the morphological and histological changes during the annual reproductive cycle of the gonads of cyprinion tenuiradius, a total of 341 specimens (102 female and 235 male specimens) were collected monthly from the rudbal river (in the qarah aghaj sub-basin, the persian gulf basin), firuzabad, fars province, southern iran. the randomly sampling was adequate to collect males and females at the immature, mature, spawning-active, and non-active phases of reproduction. five ovarian and five testicular maturation stages (i–v) were described using macroscopic and light and electron microscopic criteria. also based on the histological examination, six types of ovarian follicles (a-f) and five types of testicular cells were designated. the largest ovarian follicles were found in the stage v of ovarian developmental stages in females with mean body weight and standard length of 22.27 g and 95.13 mm, respectively. the highest number of sperms was observed in the stage v of testicular developmental stages in males with mean body weight of 25.67 g and mean standard length of 97.83 mm. based on the percentage of late ovary and testis maturation stages (iv, v) and high frequency of large oocytes and sperms it was concluded that the qarah aghaj botak spawns once a year during spring and the beginning of summer from april to july.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Histomorphometrical study of gonads in the endemic cyprinid fish, Cyprinion tenuiradius Heckel, 1847 (Cypriniformes: Cyprinidae)

To describe the morphological and histological changes during the annual reproductive cycle of the gonads of Cyprinion tenuiradius, a total of 341 specimens (102 female and 235 male specimens) were collected monthly from the Rudbal River (in the Qarah Aghaj sub-basin, the Persian Gulf basin), Firuzabad, Fars Province, southern Iran. The randomly sampling was adequate to collect males and female...

متن کامل

Histomorphometrical study of gonads in the endemic cyprinid fish, Cyprinion tenuiradius Heckel, 1847 (Cypriniformes: Cyprinidae)

To describe the morphological and histological changes during the annual reproductive cycle of the gonads of Cyprinion tenuiradius, a total of 341 specimens (102 female and 235 male specimens) were collected monthly from the Rudbal River (in the Qarah Aghaj sub-basin, the Persian Gulf basin), Firuzabad, Fars Province, southern Iran. The randomly sampling was adequate to collect males and female...

متن کامل

Ultrastructure of the chorion and the micropyle of an endemic cyprinid fish, Cyprinion tenuiradius Heckel, 1849 (Teleostei: Cyprinidae) from southern Iran

 The scanning electron microscope was used to investigate the ultrastructures of the egg membrane surface (unfertilized egg) of an endemic cyprinid fish, Cyprinion tenuiradius Heckel, 1849. The eggs of this species were almost circular in shape, had a smooth surface and one type II micropyle consisting of the flat pit and a long canal in the animal polar region. The micropyle region w...

متن کامل

Ultrastructure of the chorion and the micropyle of an endemic cyprinid fish, Cyprinion tenuiradius Heckel, 1849 (Teleostei: Cyprinidae) from southern Iran

 The scanning electron microscope was used to investigate the ultrastructures of the egg membrane surface (unfertilized egg) of an endemic cyprinid fish, Cyprinion tenuiradius Heckel, 1849. The eggs of this species were almost circular in shape, had a smooth surface and one type II micropyle consisting of the flat pit and a long canal in the animal polar region. The micropyle region was not fla...

متن کامل

Garra robertsi, a new cyprinid (Cypriniformes: Cyprinidae) fish species from Borneo.

Garra robertsi is described from specimens collected from the Sungai Bongan and Tempassuk rivers in Sabah, Borneo. The species is differentiated from G. borneensis, its only congener on the island of Borneo, in having five (versus four) transverse scale rows above lateral line, the first branched dorsal-fin ray extending beyond the posterior-most extent of any other part of the dorsal fin when ...

متن کامل

Five newly recorded Cyprinid fish (Teleostei: Cypriniformes) in Myanmar

Freshwater fish from the Putao and Myitkyina areas were collected in three ichthyofaunal surveys of the Mali Hka River and tributaries in and around Khakaborazi National Park and Hponkanrazi Wildlife Sanctuary, Kachin State, from 2014-2016. Tor yingjiangensis Chen et Yang 2004, Tor qiaojiensis Wu et al. 1977, Garra qiaojiensis Wu et al. 1977, Garra bispinosa Zhang 2005, and Schizothorax oligole...

متن کامل

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید


عنوان ژورنال:
iranian journal of fisheries science

جلد ۱۶، شماره ۲، صفحات ۴۷۷-۴۹۳

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023