Behavioral Biomarker Responses of Filopaludina bengalensis to Acute Copper Toxicity

Abstract

As heavy metals are bioaccumulative and toxic in nature, increasing heavy metal levels in the environment is of great concern. The present study was aimed to assess the acute toxicity effects of copper on some behavioral attributes of Filopaludina bengalensis (locally known as ‘Genri’), a freshwater gastropod, under laboratory condition. Exposure to copper (0.50-2.0 ppm) for 96 h resulted in significant mortality. Recorded LC50 value at 96h was 0.586 ppm. The aggregation tendency, crawling activity and mucus secretion were observed at different exposure period upon acute exposure of copper (0.586 ppm).With the advancement of exposure period, gradual deaggregation was observed in snails of copper treated sets. There was statistically significant difference (P <0.01) in aggregation response and foot protrusion response at different span of exposure in copper treated groups. In copper treated sets, a substantial increase (P<0.01) in mucus secretion (%) was evident with time. Foot protrusion and movement was inhibited in copper treated groups. All three responses in the copper treated groups were significantly different (P <0.01) from that of control groups. The behavioral responses observed in this study of Filopaludina bengalensis could be used as biomarkers for copper contamination in any aquatic ecosystems.

Evaluation of haematological and behavioural changes in Channa punctatus (Bloch) on short-term exposure to a commercial-grade synthetic pyrethroid pesticide

“…Pyrethroid toxicity is incredibly reliant on the stoichiometry of the compound. Toxicity variations between formulations with the same ingredients may be influenced by the carriers, inert substances, physiology, sex of the test specimens, and the physiochemical properties of the aqueous media (Kumar et al 2007;Sarma et al 2013;Ghosh et al 2021).…”

“…Four days static acute toxicity test was performed to estimate the median lethal concentration (LC50) value of Cypermethrin. Before determining the actual concentration of the test solution for the definitive test, a rough range-finding test was performed (Sarma et al 2013;Ghosh et al 2021). Under normal day/light conditions, a set of 10 randomly chosen fish specimens were subjected to Frequent monitoring was made to observe the mortality of the fishes.…”