Influence of ammonia on performance ability of the common bream (Abramis brama L.)

Abstract

Influence of NH 3 in doses of 0.1-0.5 mg/dm 3 on per formance ability of the common bream was studied at 15 and 20°C using a method of burdening the fish with predeteffilined physical effort. The ergometric readin � s revealed, that within the range of 0.12-0.13 mg of NH 3 /dm there was no effect of ammonia on lowering the performance ability of the fish. Within the concentration range of 0.37-0.39 mg ofNH 3 /dm3, at 15°C the value of work declined to 54% and at 20°c�to 22% of the respective values of control group.

Effect of a sublethal concentration of deltametrin on biochemical parameters of the blood serum of carp (Cyprinus carpio L.)

“…There were no signs of stress symptoms (anxiety, excessive mucus secre tion, changes in the respiratory rhythm etc.) known as a response of fishes to various haz ards (W�grzynowicz et al 1984;Klyszejko 1992Klyszejko , 1996Klyszejko , 1998.…”