Publications
This list of publications includes peer-review journal articles, official USGS publications series, reports and more authored by scientists in the Ecosystems Mission Area. A database of all USGS publications, with advanced search features, can be accessed at the USGS Publications Warehouse.
Filter Total Items: 41764
Variation in response of channel catfish to Henneguya sp. infections (Protozoa: Myxosporidea)
Abstract has not been submitted
Authors
J. P. McCraren, M.L. Landolt, G. L. Hoffman, F. P. Meyer
Residue dynamics of quinaldine and TFM in rainbow trout
Study of the residue dynamics of 2-methylquinoline (quinaldine) and 3-trifluoromethyl-4-nitrophenol (TFM) in rainbow trout yielded the following findings:1. Uptake and distribution of TFM by trout was influenced by the biotransformation of the lipidsoluble free phenol. No such effect was observed with quinaldine.2. Disappearance of quinaldine and TFM from gallbladder bile was slower than from plas
Authors
J. B. Hunn, J. L. Allen
Renal excretion in coho salmon (Oncorhynchus kisutch) after acute exposure to 3-trifluoromethyl-4-nitrophenol
COHO SALMON (ONCORHYNCHUS KISUTCH) EXPOSED TO AN ACUTE, SUBLETHAL CONCENTRATION OF 3-TRIFLUOROMETHLY 1-4 NITROPHENOL (TFM) EXHIBITED AN INCREASED OUTPUT OF URINE WHEN COMPARED WITH CONTROLS, BUT THE URINARY EXCRETION OF NA, K, CA, MG AND C1 WAS NOT AFFECTED. ABOUT 35 TIMES MORE CONJUGATED TFM THAN FREE TFM WAS EXCRETED DURING THE 24-HOUR STUDY PERIOD.
Authors
J. B. Hunn, J. L. Allen
Controlling grass carp (Ctenopharyngodon idella) with antimycin, rotenone, and thanite and by electrofishing
Abstract has not been submitted
Authors
Kenneth B. Cumming, Ralph M. Burress, Philip A. Gilderhus
A solenoid-actuated chemical-metering apparatus for use in flow-through toxicity tests
Abstract has not been submitted
Authors
J.H. Chandler, S.K. Partridge
A rural mail-carrier index of North Dakota red foxes
Rural mail-carrier sightings of red foxes (Vulpes vulpes) during mid-April, -July, and -September of 1969-73 were compared to spring fox family estimates derived by aerial searches of six townships. The mid-April mail-carrier index reflected annual fox density changes on the six townships (correlation coefficient = 0.958) . Random exclusions of individual mail-carrier reports indicated participati
Authors
S.H. Allen, A. B. Sargeant
Survival of wood duck and mallard broods in north-central Minnesota
Duckling survival in wood duck (Aix sponsa) and mallard (Anas platyrhynchos) broods was estimated from data obtained from 71 radio-marked brood hens on a study area in north-central Minnesota. Radio-marked hens produced 30 broods during the study, and 41 hens already leading broods were captured and radio-marked. Production estimates based on brood size counts were inflated by about 38 percent for
Authors
I. J. Ball, D.S. Gilmer, L.M. Cowardin, J. H. Riechmann
Leech (Hirudinea) infestations among waterfowl near Yellowknife, Northwest Territories
Fourteen species of aquatic birds, including 11 species of ducks, were infested with leeches Theromyzon rude and Placobdella ornata near Yellowknife, Northwest Territories. Leeches infested 88% of 41 American Wigeon (Anas americana) and 31% of 86 Lesser Scaup (Aythya affinis) examined after death. Lesser Scaup captured by drive-trapping contained significantly more leeches than undisturbed ducks.
Authors
James C. Bartonek, David L. Trauger
Effects of agricultural burning on nesting waterfowl
Agricultural burning in an intensively farmed region within Manitoba's pothole district is shown to affect the nesting activities of ground-nesting ducks. All species, except Blue-winged Teal (Anas discors), preferred unburned nest cover, although success was higher in burned areas, where predators may have exerted less influence. Attitudes of farmers, burning chronology, and nest destruction by f
Authors
E. K. Fritzell
Habitat use and home range of mallards breeding in Minnesota
Telemetry techniques were used to study habitat use and home range of 12 drake and 12 hen mallards (Anas platyrhynchos) in the forested region of north-central Minnesota during the 1968-72 breeding seasons. Circumneutral bogs and seasonal wetlands were the most frequently used communities; the lakeshore communities most used were sand-gravel, overhanging brush, and bog mat. Based on the availabili
Authors
D.S. Gilmer, I. J. Ball, L.M. Cowardin, J. Riechmann