Cyclic changes in gonadal maturation and histological observations of threatened freshwater catfish "narikeliru" Mystus montanus (Jerdon, 1849)

length-weight relationship of mystus tengara (ham.-buch., 1822), a freshwater catfish of indian subcontinent

length-weight relationship is the most commonly used analysis which has been used for several purposes in fisheries field among which estimation of weight from length is the most popular one. the present study has been performed to analyze the length-weight relationship of mystus tengara , a freshwater catfish of indian subcontinent. total length and body weight of the studied specimens have be...

: the effect of sericin levels (silk glue protein) on rate of in vitro maturation, fertilization and culture of sheep oocytes

هدف از آزمایش اول بررسی اثر سطوح مختلف سریسین [0 (control), 0.1, 0.5, 1.0, 2.5 %] افزوده شده به محیط , ivm بر cumulus cell expansion، بلوغ هسته و توسعه متوالی جنین، در گوسفندان نژاد سنجابی در فصل تولید مثلی می باشد. از سرگیری میوز به وسیله خارج شدن اولین پولار بادی اندازه گیری و هم چنین درصد رسیدن جنین های دو سلولی به مرحله کلیواژ و بلاستوسیت نیز به عنوان نشانه ای از میزان شایستگی توسعه اولیه ج...

Inter-specific hybridization between freshwater catfish Mystus cavasius (Ham & Buch) and M. seenghala (Sykes) by artificial fertilization.

By employing the technique of induced ovulation for artificial fertilization, inter-specific hybrids between the threatened catfish species (Mystus cavasius x M. seenghala) were produced. Fertilization, hatching and survival were significantly different between control and hybrids. The hatching time of the hybrid was significantly lower than that of the control. The average performance viz., ha...

Histological Changes in the Activity of the Thyroid Follicles and Its Impact on Ovarian Tissues in Mystus Vittatus (bloch, 1794) during Growth, Maturation and Spawning Phases

The thyroid gland of Mystus vittatus was unencapsulated, composed of follicles scattered mainly around the ventral aorta in the sub pharyngeal region. Each follicle provided with agranular eosinophilic colloid materials in the central lumen was encircled by a single layer of epithelial cells. The follicular cells varied according to the secretary activity in harmony with the reproductive cycle....

Histological Studies on Kidney of Cadmium Chloride Exposed Freshwater Catfish , Heteropneustes Fossilis ( Bloch )