| chlorinated hydrocarbons and biomarkers of exposure in wading birds and fish of the lower rio grande valley, texas. | during 1997 we evaluated reproductive success in colonial water birds nesting in the lower rio grande valley (lrgv), texas, and correlated success with concentrations of contaminants in eggs. we also measured steroid hormones and gonadosomatic index (gsi) as biomarkers of endocrine effects in common carp (cyprinus carpio). nest and fledging success of green herons (butorides virescens) and great egrets (ardea alba) were similar to those found in other parts of north america; however, nesting suc ... | 2001 | 11116345 |
| 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 |
| mercury concentrations in fish from lake meredith, texas: implications for the issuance of fish consumption advisories. | we examined how length of fish is related to mercury concentrations in muscle tissue of seven species of fish from lake meredith, texas and determined how sex and growth rate are related to mercury concentration in walleye (sander vitreus). flathead catfish (pylodictis olivaris), walleye and white bass (morone chrysops) had the highest concentrations of mercury and channel catfish (ictalurus punctatus), common carp (cyprinus carpio), river carpsucker (carpiodes carpio) and gizzard shad (dorosoma ... | 2006 | 17054010 |