Comparative effects of the sublethal poisoning of zinc, copper and lead on the gonads of the teleost Puntius conchonius ham.

The histopathological impact of the sublethal concentrations of zinc, copper and lead on the gonads of Puntius conchonius was evaluated. Copper (Cu) interfered with spermatogenesis temporarily while zinc (Zn) and lead (Pb) produced dilation in the testicular blood capillaries with necrosis and disintegration of the seminiferous tubules. All three metals induced significant atresia in the ovary.

Toxicity of Temik (aldicarb) for a fresh water teleost, Barbus conchonius Hamilton.

The toxic effects of Temik (aldicarb) on a fresh water Himalayan lake teleost, Barbus conchonius were investigated in hard and soft water. The 48-, 72- and 96-h TLm-values in mg/l were 8.99, 2.