Life-history trade-offs of Paronychiurus kimi (Lee) (Collembola: Onychiuridae) populations exposed to paraquat

Won Il Choi, Deborah A. Neher, Mun Il Ryoo
2008 Ecotoxicology and Environmental Safety  
The demography of Paronychiurus kimi, a dominant collembolan in paddy fields of Korea, was quantified for four treatments of the herbicide paraquat (0, 1.6, 16, 160 and 1600 mg/cm 2 ) in a controlled environment using plaster-of-Paris as the test substrate. The survival rates of adults, and the reproductive fitness of P. kimi, were not affected by paraquat except at the highest dosage (1600 mg/cm 2 ), when fed baker's yeast and reared on plaster-charcoal substrate. However, results of
more » ... ry experiments suggest that fitness was maintained by a tradeoff between fecundity and reproductive period. It is suggested that these are potential life-history tradeoffs of Collembola that were exposed to the manufacturer's recommended concentration of paraquat (16 mg/cm 2 ).
doi:10.1016/j.ecoenv.2007.01.008 pmid:17374394 fatcat:s772a4s26ja4xoy4wysbavfvem