title: Reduced viability of F1 egg ropes in Chironomus riparius exposed to di-2-ethylhexyl phthalate (DEHP).
abstract: The midge (Chironomus riparius), an aquatic invertebrate, was exposed to di-2-ethylhexyl phthalate (DEHP) to evaluate the effects on reproductive processes via sediment toxicity. The test endpoints included emergence, sex ratio, fecundity and viability of F1 offspring egg ropes. After exposures of C. riparius to DEHP in this study, a significant result was observed only in the viability test of F1 egg ropes. That is, hatching rates of F1 egg ropes from DEHP exposed adults were decreased significantly. This result provides the evidence that DEHP could lead abnormal egg ropes development by DEHP exposure during larval period. This means that DEHP could effect to Chironomus population density through reduced F1 offspring.
authors.affiliation: Digital Information Center for Environment Research, University of Pohang Science and Technology, Hyoja-dong, San 31, Pohang-790 784, Korea. ejkimi@postech.ac.kr
authors.forename: Eun Joo
authors.initials: EJ
authors.lastname: Kim
authors.forename: Sung Kyu
authors.initials: SK
authors.lastname: Lee
mesh_terms: D000818:Animals; D002683:Chironomidae / Q000187:drug effects* / Q000254:growth & development; D004051:Diethylhexyl Phthalate / Q000633:toxicity*; D004305:Dose-Response Relationship, Drug; D004781:Environmental Exposure; D004785:Environmental Pollutants / Q000633:toxicity*; D005260:Female; D019015:Geologic Sediments / Q000737:chemistry; D010063:Ovum / Q000187:drug effects*; D011156:Population Density; D012098:Reproduction / Q000187:drug effects*
chemical_list: D004785:Environmental Pollutants; D004051:Diethylhexyl Phthalate