Cadmium toxicity to rudd (Scardinius erythrophthalmus (L.)) larvae after short-term exposure
2006
Sikorska, J., E-mail: [email protected] | Wolnicki, J. (Inland Fisheries Institute, Olsztyn (Poland). Dept. Pond Fisheries)
Rudd, Scardinius erythrophthalmus (L.), larvae aged four days post-hatch and at the very beginning of swimbladder inflation were exposed to cadmium (0.0, 0.1, 0.2, and 0.3 mg/l) at 22.0 deg C (plus minus 0.5 deg C) for 24 h. Following exposure, the larvae were reared in pure water in a recirculating system at 25.0 deg C (plus minus 0.5 deg C) for the subsequent nine days. Cadmium resulted in reduced larval growth and survival, retarded swimbladder inflation, and the delayed onset of exogenous feeding on live Artemia nauplii. All these effects were dependent on concentration. The differences between the effects of cadmium at the lowest and the highest concentrations were significant (P greater or equal 0.05). The results demonstrated the highly toxic effect of short-term exposure to 0.1-0.3 mg Cd/l in rudd larvae
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