Publications

Residues of the anesthetic benzocaine in muscle tissue of rainbow trout (Salmo gairdneri ) and largemouth bass (Micropterus salmoides ) were determined after exposure of the fish to 50 mg benzocaine/L for 15 min and withdrawal times of 0-24 h. The mean concentration of benzocaine residues in fish sampled immediately after exposure was 14.0 mu g/g in rainbow trout and 10.6 mu g/g in largemout

Spatial and temporal variations in the abundance of young-of-the-year channel catfish Ictalurus punctatus were determined over 3 years based on 154 trawls taken from Navigation Pool 7 of the upper Mississippi River. No significant spatial patterns in abundance or length of fish in the catch were found in seven poolwide surveys of the main channel. However, high variation among replicates exist

Using a reversed-phase high-performance liquid chromatographic (HPLC) technique, a mixture of antimycins A was separated into eight hitherto unreported subcomponents, A1a, A1b, A2a, A2b, A3a, A3b, A4a, and A4b. Although a base-line resolution of the known four major antimycins A1, A2, A3, and A4 was readily achieved with mobile phases containing acetate buffers, the separation of the new antibioti

Abstract not submitted to date

Abstract not submitted to date

The success of vegetation management programs for waterfowl is dependent on knowing the physical and physiological requirements of target species. Lakes and riverine impoundments that contain an abundance of the American wildcelery (Vallisneria americana ) have traditionally been favored by canvasbacks (Aythya valisineria ) and other waterfowl as feeding areas during migration. Information on t

Research on the hydrology of Williams Lake, north-central Minnesota includes study of evaporation. Presented here are those climatic data needed for energy-budget and mass-transfer studies, including: water-surface temperature, dry-bulb and wet-bulb air temperatures, wind speed, precipitation, and solar and atmospheric radiation. Some calculated values necessary for these studies, such as vapor pr

Water levels, locations, depths, and aquifers tapped are given for 112 observation wells. Tabulated data include extremes of water levels for calendar year 1986 and for the period of record, pumpage of most major groundwater users in the State, and water-quality data from selected wells. The largest reported user of ground-water, the city of Lansing, pumped 7.6 billion gallons from the Saginaw For

Since the 1976-77 drought in Minnesota, legislators, planners, and citizens have become aware of the need for water management based on knowledge of water availability and use in order to alleviate local water shortages. In addition to maintaining an adequate supply, information on the amount of water used, where it is used, and how it is used is needed to help resolve problems of resource allocat

Water transfer data were collected by the U.S. Geological Survey , in cooperation with the Minnesota Department of Natural Resources, from the 13 hydrologic subregions in Minnesota. About 30,000 acre-ft of water is exported annually from eight of these subregions. Interbasin transfer of water is classified according to type of water conveyance in Minnesota. This information is needed by water-syst

The Minnesota Water-Use Data System stores data on the quantity of withdrawals and discharge in Minnesota. To transfer these data into the U.S. Geological Survey 's National Water-Use Data System properly, certain procedures must be followed. Uniform data categorization and entry allows comparison of water use from State to State. The data in the National Water-Use Data System are aggregated by co

Water resources data for the 1987 water year for Michigan consists of records of stage, stage and contents of lakes and discharge, and water quality of streams; reservoirs; and water levels and water temperature of ground water. This report contains discharge records for 135 streamflow-gaging stations; stage only records for 15 lake-gaging stations; stage and contents for 5 lakes and reservoirs; w