Publications

parasites of native and nonnative fishes of the little colorado river, grand canyon, arizona.	a 2-yr, seasonal, parasitological study of 1,435 fish, belonging to 4 species of native fishes and 7 species of nonnative fishes from the lower little colorado river (lcr) and tributary creeks, grand canyon, arizona, yielded 17 species of parasites. these comprised 1 myxozoan (henneguya exilis), 2 copepods (ergasilus arthrosis and lernaea cyprinacea), 1 acarine (oribatida gen. sp.), 1 piscicolid leech (myzobdella lugubris), 4 monogeneans (gyrodactylus hoffmani, gyrodactylus sp., dactylogyrus ext ...	2004	15562604
environmental contaminants and biomarker responses in fish from the rio grande and its u.s. tributaries: spatial and temporal trends.	we collected, examined, and analyzed 368 fish of seven species from 10 sites on rivers of the rio grande basin (rgb) during late 1997 and early 1998 to document temporal and geographic trends in the concentrations of accumulative contaminants and to assess contaminant effects on the fish. sites were located on the mainstem of the rio grande and on the arroyo colorado and pecos river in texas (tx), new mexico (nm), and colorado. common carp (cyprinus carpio) and largemouth bass (micropterus salmo ...	2005	16227080
chemical contaminants, health indicators, and reproductive biomarker responses in fish from the colorado river and its tributaries.	common carp (cyprinus carpio), black bass (micropterus spp.), and channel catfish (ictalurus punctatus) were collected from 14 sites in the colorado river basin (crb) to document spatial trends in accumulative contaminants, health indicators, and reproductive biomarkers. organochlorine residues, 2,3,7,8-tetrachlorodibenzo-p-dioxin-like activity (tcdd-eq), and elemental contaminants were measured in composite samples of whole fish, grouped by species and gender, from each site. selenium (se) and ...	2007	17418376
parasites of fishes in the colorado river and selected tributaries in grand canyon, arizona.	abstract as part of the endangered humpback chub (hbc) gila cypha adaptive management program, a parasite survey was conducted from 28 june - 17 july 2006 in 8 tributaries and 7 adjacent sections of the main stem colorado river (cor). in total 717 fish were caught, including 24 hbc, field necropsies yielded 19 parasite species, 5 of which (achtheres sp., kathlaniidae gen. sp., caryophyllaidae gen. sp., myxidium sp., and octomacrum sp.) are new records for the grand canyon. spearman's correlation ...	2011	21793700
polybrominated diphenyl ether metabolism in field collected fish from the gila river, arizona, usa--levels, possible sources, and patterns.	polybrominated diphenyl ethers (pbdes) were determined in fish collected from the gila river, arizona, a tributary of the colorado river in the lower part of the colorado river basin. fish samples were collected at sites on the gila river downstream from hayden, phoenix, and arlington, arizona in late summer 2003. the gila river is ephemeral upstream of the phoenix urban area due to dams and irrigation projects and has limited perennial flow downstream of phoenix due to wastewater and irrigation ...	2013	22939514