Alterations in ultra-structures and elemental composition of ovaries of Labeo rohita (Hamilton-Buchanan) as a pollution indicator in Harike Wetland (Ramsar Site), India.

Teleosts are the largest class of bony fishes and account for more than 90% of fish species. Their reproductive systems are the key feature to adopt gradual evolutionary change under aquatic environmental conditions. Aquatic ecosystems are faced with a serious threat to their proliferation due to the discharge of untreated industrial effluents into them.