Studies on the formation of compound yolk in the developing oocytes of an air-breathing fish Channa punctatus (Bloch).

Abstract

The yolk which is a store of nutritive materials accumulated during oocyte development, differs widely from species to species in proportion and total amount of its proteinous, fatty and other components such as nucleic acids, carbohyrates and plasma proteins. The available evidences indicate wide variation in the origin and chemical transformation of yolk inclusions during oogenesis in fishes

Critical remarks on the paper of R.N.P. Shahi et al. (1979) Cytologia 44(2): 397-408 on the formation of compound yolk in the developing oocytes of an air-breathing fish Channa punctatus (Bloch).

“…Figures 1 and 2 feature the micropyles of minnow (Phoxinus phoxinus) and chub (Leuciscus cephalus). The comparison of these two figures with the figures 8 and 9 in the paper of Shahi et al (1979) demon strates, that these figures also feature micropyles. So you can regard the inter pretation of Shahi et al (1979) as disproved.…”

“…According to own investigations on several limnic and marine teleost fish Shahi et al (1979) give an incorrect interpretation of their results. In figures 8 and 9 of their paper they believe to show the entrance of extra-oocytic material through follicular epithelium and vitelline membrane into the ooplasm.…”

“…Recently the micro pyle of teleost fish is intensively investigated by light and electron microscopy (Szollosi and Billard 1974, Riehi and Gotting 1974, 1975, Riehl and Schulte 1977b, 1978, Riehl 1977, 1978a, 1979, 1980. Figures 1 and 2 feature the micropyles of minnow (Phoxinus phoxinus) and chub (Leuciscus cephalus).…”

“…The correctness of a further result of Shahi et al (1979) formed either by golgi bodies (Anderson 1968, Riehl 1978b or fusion of vesicles (Kudo 1969, Riehl andShulte 1977a …”