Behavioural and morphological manifestations in Labeo rohita (Hamilton–Buchanan) under the exposure of Lead Nitrate.

Onkar Singh Brraich; Manjeet Kaur

Volume : IV, Issue : VIII, August - 2015

Behavioural and morphological manifestations in Labeo rohita (Hamilton–Buchanan) under the exposure of Lead Nitrate.

Onkar Singh Brraich, Manjeet Kaur

Abstract :

This paper emphasises on the behavioural responses and morphological anomalies observed in the freshwater fish, Labeo rohita on being exposed to Lead Nitrate. The prominent changes in the behaviour observed were restlessness, swimming impairments, jerky movements, loss of equiliium, drowning, hitting against the wall of test aquaria, increased and fast opercular movements, rapid surfacing and gulping of air and severe diarrhoea. Further, shedding of scales, fusion of fins, lesions on skin, eye deformities, muscular tetany, caudal bending/scoliosis, dullness in the body colour along with profuse mucus secretion were the morphological anomalies observed. Fishes in sub–lethal concentration were found to be under stress, no death was recorded. Control fishes were also monitored to record the normal behaviour. The study was for 60 days. The observations were recorded after 15, 30, 45 and 60 days of exposure.