| intersex and other reproductive disruption of fish in wastewater effluent dominated colorado streams. | intersex white suckers (catostomus commersoni) were collected in boulder creek and the south platte river downstream of wastewater treatment plant (wwtp) effluent but not at reference sites. eighty-three percent of the 60 white suckers collected downstream of the boulder wwtp in spring and fall were female compared to 45% upstream (n=33). only female (n=16) and intersex white suckers (n=4) were collected in the south platte river downstream of the denver wwtp in the spring. gonad deformities and ... | 2006 | 16919504 |
| infection by a black spot-causing species of uvulifer and associated opercular alterations in fishes from a high-desert stream in wyoming. | black spot is a common disease syndrome of freshwater fishes. this study provides information on the rank of density of the black spot agent and opercular bone alterations associated with at least one digenean, uvulifer sp., infecting native and non-native catostomids and cyprinids of the upper colorado river basin. we evaluated the density rank of pigmented metacercariae and associated alterations in the operculum of the bluehead sucker catostomus discobolus, flannelmouth sucker c. latipinnis, ... | 2007 | 18286809 |
| an introduced and a native vertebrate hybridize to form a genetic bridge to a second native species. | the genetic impacts of hybridization between native and introduced species are of considerable conservation concern, while the possibility of reticulate evolution affects our basic understanding of how species arise and shapes how we use genetic data to understand evolutionary diversification. by using mitochondrial nadh dehydrogenase subunit 2 (nd2) sequences and 467 amplified fragment-length polymorphism nuclear dna markers, we show that the introduced white sucker (catostomus commersoni) has ... | 2008 | 18658235 |
| antidepressant pharmaceuticals in two u.s. effluent-impacted streams: occurrence and fate in water and sediment, and selective uptake in fish neural tissue. | antidepressant pharmaceuticals are widely prescribed in the united states; release of municipal wastewater effluent is a primary route introducing them to aquatic environments, where little is known about their distribution and fate. water, bed sediment, and brain tissue from native white suckers (catostomus commersoni) were collected upstream and at points progressively downstream from outfalls discharging to two effluent-impacted streams, boulder creek (colorado) and fourmile creek (iowa). a l ... | 2010 | 20121081 |
| demasculinization of male fish by wastewater treatment plant effluent. | adult male fathead minnows (pimephales promelas) were exposed to effluent from the city of boulder, colorado wastewater treatment plant (wwtp) under controlled conditions in the field to determine if the effluent induced reproductive disruption in fish. gonadal intersex and other evidence of reproductive disruption were previously identified in white suckers (catostomus commersoni) in boulder creek downstream from this wwtp effluent outfall. fish were exposed within a mobile flow-through exposur ... | 2011 | 21473848 |