chemical pollutants presence in water may induce severe ecological consequences and consequently affecting aquatic ecosystems integrity. heavy metals are dangerous pollutants for aquatic inhabitants that have a great stability. heavy metals contamination (pollution) of the surface waters happens widely by discharge of mill effluents. the objective of the present study was to determine the 50% l...

The effect of 96 h exposure the goldfish Carassius auratus to two different types bioplastic particles, originating from commercial shopping bag (Bag, ~5 mm) and polylactic acid-based (PLA) cup (Cup, ≤5 mm), petroleum-based polyamide particles (PA, 0–180 µm) was studied. All were studied as virgin after simulated UV-degradation (at concentration 30 mg L−1). experiments conducted according OECD ...

VINEGAR, A. AND R. E. DAVIS. Branchial ventilation rates of cataleptic goldfish (Carassius auratus) and the effects of light and electric shock. PHYSIOL. BEHAV. 8 (3) 417-420, 1972.--Inverted, cataleptic goldfish showed an increase in ventilation rate over a 20 min period. The time-dependent increase in respiratory movement was initially suppressed when a 10 see light or a 0.1 see shock was pre...

Susceptibility of the goldfish to infection with the newly hatched second stage larvae of Contracaecum rudolphii was investigated under laboratory condition. A week after the larvae had been placed in the fish tank, the autopsied goldfish showed the nematodes in their intestine lumen. The majority of the larvae were dead. In week 2 and 3 of exposure, the larvae were being found exclusively in t...

Antiserum to the catalytic subunit of goldfish brain (Na+, K+)-ATPase has been employed at the electron microscopic level by means of the peroxidase-antiperoxidase immunohistochemical method. In optic nerve, antigenic sites are restricted to the nodes of Ranvier. No reaction product is detected in underlying internodal neurolemma. Outgrowing neurites for cultured retinal explants devoid of glia...

This study aimed to evaluate the efficacy of silver sulfate (AgSO4) as a toxicant in goldfish (Carassiusauratus). One hundred and forty-seven live specimens of C. auratus were obtained and exposed to 1, 10, 100, 500, 1000 and 2000 ppm of AgSO4for 96 hours. There was one control group (no AgSO4) and three replicates. The physicochemical properties of water and the following parameters were const...

Goldfish died within 24 hr after intraperitoneal injections of 0.2 ml of Seitz filtrates of hemolytic Staphylococcus aureus cultures grown on Dolman and Wilson medium under increased CO(2) pressure for 72 to 96 hr. Two lethal toxins differing in heat sensitivity, antigenicity, and degree of toxicity were demonstrated. Studies of the relationship between the lethal factors and the hemolysins in ...

Goldfish were taught to press a lever for food reinforcement and were placed on a 1-minute fixed-interval schedule. They developed the characteristic temporal discrimination (scalloping) seen in rats and pigeons. There was no change in their relative response rate through the 1-minute interval when ambient temperature was decreased by 10 degrees C. This 10 degrees C temperature drop, which appr...