engleski

Assessment of Prussian carp (Carassius gibelio) responses to waters impacted by the wastewater treatment plant

Treated wastewaters are abundant with complex pollutants having a significant impact on aquatic ecosystems. Since fish respond to low concentrations of environmental pollutants, they are ideal models for assessing these effects. The biological effects may affect all levels of biological organization, and it is thus a challenge to identify adequate biomarker indicators of toxic effects, especially since the treated wastewater effluents are chemically complex, constantly changing and biologically active (Topić Popović et al., 2016). Prussian carp (Carassius gibelio) is the most dominant fish species in lentic and slowly running aquatic habitats (Lusk et al. 2010). Several carp species have previously been included for in situ evaluation of effects of wastewater treatment plants (WWTP), but their impact on native species is less investigated, although assessment of biological responses of wild-caught fish in WWTP-related waters will more likely indicate actual ecological effects of treated wastewater. The scope of this work was thus to assess the impact of treated wastewaters on native wild Prussian carp inhabiting respective waters, with a hypothesis that fish would display pronounced biological responses. To that end, general fish health status was determined, as well as an array of selected plasma biochemical, haematological, oxidative stress and tissue histopathological indices.

wastewater treatment plant ; Carassius gibelio ; health assessment

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