Gonadal development and differentiation of germ cells during larval growth of Cyprinus carpio

Abstract

Gonadal development and differentiation of germ cells was studied during larval growth of Cyprinus carpio. The larval stages (immature) collected from fish breeding center, at Paithan. The first fish sampled after 15 days of hatching. The anatomical and histological studies have been carried out form fry to fingerling. The gonadal tissue showed its presence at very early stages of life. It is found that the gonadal tissue formation started at early fry stage where they attached to the coelomic wall by means of chord of mesovarium. A correlation has been noticed between the length and weight of fish to the development of gonad. In early stages, the gonad was differentiated with few germ cells. On 4^th week the fish was measured 10mm and showed development of gonad stared form anterior region and proceeded in posterior direction. The gonads were filled with large number of somatic cells, few surrounding Cyst cell stained dark blue with Haematoxylin. Further, at fingerling stage the cells were differentiated into male and female germ cells.