| micro structure analysis of the ovaries of common carp, cyprinus carpio l. inhabiting a polluted reservoir, umiam in meghalaya, india. | the study uses microscopy to analyze damage caused to the ovaries of a fresh water fish, cyprinus carpio l., owing to its exposure to municipal wastes in a polluted reservoir, umiam in meghalaya, india. histological analysis of the ovary showed atretic oocytes, detached ovarian wall, detached follicular linings, and necrosis of nuclei. scanning electron microscopy revealed deformed oocytes with a rough and distorted surface. transmission electron microscopy showed a poorly developed chorion, pre ... | 2014 | 25089745 |
| an electron microscopic analysis on the ultra structural abnormalities in sperm of the common carp cyprinus carpio l. inhabiting a polluted lake, umiam (meghalaya, india). | the present communication reports the ultra structural abnormalities in sperm of a fish species cyprinus carpio inhabiting a polluted lake, umiam in north-east india. transmission electron microscopy (tem) revealed absence of differentiation between head and midpiece (neck) of some sperm while scanning electron microscopy (sem) showed some sperm tails with highly reduced length and some sperm with folded tail. abnormal shape of some sperm head was also revealed by scanning electron microscopy. d ... | 2011 | 21509904 |
| reproductive cycle of the endemic and threatened fish puntius shalynius (cypriniformes: cyprinidae) in meghalaya, india. | puntius shalynius is a highly endemic freshwater minor carp that is economically important and is threatened because of its ornamental value. the present investigation evaluated this barb gonadal maturation, based on morphology and spawning of this species in the umiam river, meghalaya, india. the population of this indigenous fish has declined due to its fragmented distribution and exploitation as an ornamental fish. the reproductive cycle of p. shalynius was studied for the first time. a total ... | 2017 | 29466642 |