| organochlorine insecticide concentrations in fish of the des moines river, iowa, 1977-78. | organochlorine insecticides were measured in fish of the des moines river, iowa, in 1977 and 1978 to determine whether concentrations exceeded allowable levels and to compare differences among species. significant differences in mean concentrations of dieldrin, sigma ddt, and heptachlor epoxide in whole-body samples of seven species of fish, dorosoma cepedianum, carpiodes carpio, cyprinus carpio, ictalurus punctatus, pomoxis annularis, micropterus salmoides, stizostedion vitreum, could not be ad ... | 1981 | 7312555 |
| influence of a new impoundment on pesticide concentrations in warmwater fish, saylorville reservoir, des moines river, iowa, 1977-78. | samples of seven species of warmwater fish were collected above, within, and below newly impounded saylorville reservoir, des moines river, iowa, from october 1977 to october 1978. whole-body analyses by gas chromatography were significantly higher in river carpsucker (carpiodes cyanazine and for the organochlorine insecticides dieldrin, p,p'-dde, p,p'-tde, p,p'-ddt, and heptachlor epoxide. only the organochlorine insecticides were detected in fish tissue. concentrations of dieldrin and heptachl ... | 1981 | 7348796 |