title: Micro structure analysis of the ovaries of common carp, Cyprinus carpio L. inhabiting a polluted reservoir, Umiam in Meghalaya, India.
abstract: 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, presence of relatively less electron-dense materials as compared with control, multinucleation in some cells surrounding the oocytes, and distorted and condensed mitochondria. The importance of microscopy in its different forms in analyzing histological, surface microstructural and fine structural damage to fish ovaries in response to environmental pollution owing to municipal wastes and city garbage is discussed with the help of available literature.
authors.affiliation: 1Department of Zoology,St. Anthony's College,Shillong-1,Meghalaya-793001,India.
authors.forename: Bashida
authors.initials: B
authors.lastname: Massar
authors.affiliation: 2Sophisticated Analytical Instrument Facility,NEHU,Shillong-793022,Meghalaya,India.
authors.forename: Sudip
authors.initials: S
authors.lastname: Dey
authors.affiliation: 3Department of Zoology,Gauhati University,Guwahati-781014,Assam,India.
authors.forename: Karabi
authors.initials: K
authors.lastname: Dutta
mesh_terms: D000818:Animals; D002347:Carps; D005260:Female; D006651:Histocytochemistry; D007194:India; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D010053:Ovary / Q000187:drug effects* / Q000473:pathology*; D014873:Water Pollutants / Q000633:toxicity*; D014876:Water Pollution
chemical_list: D014873:Water Pollutants