Skeletal morphology and maturation of male Gambusia holbrooki exposed to sewage treatment plant effluent
MetadataShow full item record
Sewage effluent has been identified as a major source of endocrine disrupting chemicals (EDCs) in the aquatic environment. The modified hemal spines (modified skeletal structures important in reproduction) of mosquitofish, Gambusia spp. have been shown to beunder androgenic control and to be affected by exposure to estrogen. The current study aimed to investigate the effects of two sewage treatment plants (STPs) in Sydney, Australia on the morphology of hemal spines in populations of Gambusia holbrooki and on the abilityof the fish to reach sexual maturity. The effluent from the two STPs had different effects on the hemal spines of males. At St. Marys differences in hemal spine morphology between fish upstream and downstream of the STP were not attributable to effluent from the STP.At Quakers Hill, results suggest that the effluent is generally estrogenic to G. holbrooki. There was a decrease in the proportion of males that were morphologically mature downstream of both STPs indicating potential population level effects that were associated with thepresence of the STPs.
Showing items related by title, author, creator and subject.
The Effect of 17b-Estradiol on the Development of Modified Hemal Spines in Early–Life Stage Gambusia holbrookiRawson, Christopher; Lim, R.; Warne, M.; doyle, C. (2006)The morphologic development of the gonopodium of male mosquitofish, Gambusia holbrooki, is essential for proper reproductive function and has previously been used as a biomarker for the presence of endocrine-disrupting ...
Assessment of wastewater and recycled water quality: A comparison of lines of evidence from in vitro, in vivo and chemical analysesLeusch, F.; Khan, S.; Gagnon, Marthe Monique; Quayle, P.; Trinh, T.; Coleman, H.; Rawson, Christopher; Chapman, H.; Blair, P.; Nice, H.; Reitsema, Tarren (2014)We investigated water quality at an advanced water reclamation plant and three conventional wastewater treatment plants using an “ecotoxicity toolbox” consisting of three complementary analyses (chemical analysis, in vitro ...
Endocrine disruption in male mosquitofish (Gambusia holbrooki) inhabiting wetlands in Western AustraliaGame, Clare; Gagnon, Marthe; Webb, Diane; Lim, R. (2006)The use of gonopodial indices as potential indicators of endocrine disruption in the mosquitofish Gambusia holbrooki inhabiting south west Australian wetlands was investigated. A minimum of 50 mature males was collected ...