HISTOLOGICAL AND CYTOLOGICAL STUDIES ON OOCYTE DEVELOPMENT OF THE LARVIVOROUS FISH, APLOCHEILUS PANCHAX HAMILTON AND BUCHANAN
K. PADMAJA *
DEPARTMENT OF ZOOLOGY, ANDHRA UNIVERSITY, VISAKHAPATNAM-530003,INDIA.
K. SHYAMASUNDARI *
DEPARTMENT OF ZOOLOGY, ANDHRA UNIVERSITY, VISAKHAPATNAM-530003,INDIA.
K. HANUMANTHA RAO *
DEPARTMENT OF ZOOLOGY, ANDHRA UNIVERSITY, VISAKHAPATNAM-530003,INDIA.
*Author to whom correspondence should be addressed.
Abstract
Histological and cytological observations of oocyte development in the lesser top minnow, Aplocheilus panchax were described Various stages of developing oocytes of A. panchax also shown. The development of oocytes were classified into six stages according to the histological characters. First growth phase with two stages and three stages in second growth phase. Yolk bodies make their appearance from the beginning of second growth phase. Histochemical studies show that three types of yolk granules are found during vitellogenesis. Lipid yolk found as lipid doplets followed by protein yolk granules. the third type of inclusions are the intravesicular yolk, carbohydrate yolk which form the peripheral cytoplasm after the lipid protein yolk started to accumulate.