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An assessment of the effect of rotenone on selected non-target aquatic fauna

Show simple item record Dalu, Tatenda Wasserman, Ryan J. Jordaan, Martine Froneman, William P. Olaf, L. Weyl, F. 2017-08-24T08:23:13Z 2017-08-24T08:23:13Z 2017-08 2015
dc.identifier.citation Dalu T, et al. 2015 ' An Assessment of the effect of Rotenone on selected Non-Target Aquatic Fauna. PLoS ONE 10(11): e0142140, pp 1-13, doi:10.1371/journal.pone.0142140 en_US
dc.description.abstract Rotenone, a naturally occurring ketone, is widely employed for the management of invasive fish species. The use of rotenone poses serious challenges to conservation practitioners due to its impacts on non-target organisms including amphibians and macroinvertebrates. Using laboratory studies, we investigated the effects of different rotenone concentrations (0, 12.5, 25, 37.5, 50, 100 μg L-1) on selected invertebrate groups; Aeshnidae, Belostomatids, Decapods, Ephemeroptera, Pulmonata and zooplankton over a period of 18 hours. Based on field observations and body size, we hypothesized that Ephemeropterans and zooplankton would be more susceptible to rotenone than Decapods, Belostomatids and snails. Experimental results supported this hypothesis and mortality and behaviour effects varied considerably between taxa, ranging from no effect (crab Potamonuates sidneyi) to 100% mortality (Daphnia pulex and Paradiaptomus lamellatus). Planktonic invertebrates were particularly sensitive to rotenone even at very low concentrations. Future research should investigate the recovery time of invertebrate communities after the application of rotenone and conduct field assessments assessing the longer term effects of rotenone exposure on the population dynamics of those less sensitive organisms. en_US
dc.description.sponsorship South African National Research Foundation (NRF) en_US
dc.format.extent 13 p. en_US
dc.format.medium PDF en_US
dc.language.iso en en_US
dc.publisher PLoS ONE en_US
dc.relation.requires Adobe acrobat reader en_US
dc.subject Rotenone en_US
dc.subject Fish species en_US
dc.subject Planktonic invertebrates en_US
dc.title An assessment of the effect of rotenone on selected non-target aquatic fauna en_US
dc.type Article en_US
dc.rights.holder National Research Foundation en_US

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