Sunki j metal ir j binarinio mi inio poveikio uv kardiorespiracinei sistemai ankstyvojoje ontogenez je tyrimai Research into the Effect of Heavy Metals and Their Binary Mixture on the Cardio-Respiratory System of Fish Larvae

iame straipsnyje nagrin jamas sunki j metal (Ni, Cu) ir j binarinio mi inio (Ni + Cu) toksinis poveikis vaivoryk tinio up takio (Oncorhynchus mykiss) lerv kardiorespiracinei sistemai, priklausomai nuo veikiamo metalo rū ies, metal koncentracijos ir ekspozicijos trukm s. Vaivoryk tinio up takio vienadien s lervos buvo veikiamos Ni (0,1; 0,2 mg/l), Cu (0,25; 0,5 mg/l) ir j binariniu mi iniu. Ilgalaikio tyrimo metu (30 par ) buvo registruojami lerv fiziologiniai rodikliai – irdies ir kv pavimo da niai (krt./min.) po 5, 10 ir 20 par ekspozicijos. Atlikus eksperimentinius tyrimus, nustatytas sunki j metal ir j binarinio mi inio poveikis vaivoryk tinio up takio lerv irdies ir kv pavimo da niams, priklausomai nuo veikiamo metalo rū ies, koncentracijos ir ekspozicijos trukm s. Tyrimo rezultatai rodo, kad atskir sunki j metal (Ni, Cu) poveikis lerv kardiorespiracinei sistemai silpnesnis, nei veikiant metal binariniu mi iniu. This article investigates toxic effects of heavy metals (Ni, Cu) and their binary mixture (Ni+Cu) on the cardio-respiratory system of rainbow trout (Oncorhynchus mykiss) larvae depending on the type of metal, metal concentration and the duration of their exposure. The one-day larvae of rainbow trout were exposed to Ni (0,1; 0,2 mg/l, respectively), Cu (0,25; 0;5 mg/l, respectively) and their binary mixture. During long-term exposure (30 days), the physiological parameters of larvae, e.g. heart rate (counts/min), gill ventilation frequency (counts/min) after 5, 10 and 20 days of exposure were recorded. During experimental studies, the effects of heavy metals and their binary mixture on the heart rate and gill ventilation frequency of rainbow trout larvae depending on the type of metal, their concentrations and exposure duration were determined. Consequently, comparative studies on toxic effects of heavy metals and their binary mixture on the cardio-respiratory system of rainbow trout larvae showed that the binary mixture was more toxic to larvae than to single metals. Article in Lithuanian