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: 41920
A hematologic survey of captive waterfowl
Hematologic parameters were studied in giant Canada geese (Branta canadensis maxima), mallard ducks (Anas platyrhynchos platyrhynchos) and various species of diving ducks at seasonal intervals throughout the year. Highest values for packed cell volume, hemoglobin content and erythrocyte counts were found in the winter and pre-nesting periods. Mean corpuscular volume and mean corpuscular hemoglobin
Authors
H.J. Shave, V. Howard
Acute toxic effects of two lampricides on twenty-one freshwater invertebrates
We conducted laboratory static bioassays to determine acute toxicity of two lampricides -- a 70% 2-aminoethanol salt of 5,2'dichloro-4'-nitrosalicylanilide (Bayer 73) and a mixture containing 98% 3-trifluoromethyl-4-nitrophenol (TFM) and 2% Bayer 73 (TFM-2B) -- to 21 freshwater invertebrates. LC50 values were determined for 24-h exposure periods at 12.8 C. Organisms relatively sensitive to Bayer 7
Authors
Robert P. Rye, Everett Louis King
Allantoinase in the marine polychaete Eudistylia vancouveri
Allantoinase, an enzyme in the purine-urea cycle, was found in Eudistylia vancouveri (Polychaeta). The enzyme had a pH optimum at 7.6. The Km was 0.012 M allantoin, and the Arrhenius energy of activation was 12.6 to 14.6 kcal/mol.
Authors
Dora R. M. Passino, G.W. Brown
Retention of mercury in the muscle of yellow perch (Perca flavescens) and rock bass (Ambloplites rupestris)
Mercury-contaminated yellow perch (Perca flavescens) and rock bass (Ambloplites rupestris) were collected from Lake St. Clair and stocked in two earthen ponds in September 1970. Twenty-six months later, concentrations of total mercury in the fillets had declined 53% in the yellow perch and 59% in the rock bass; however, the mean weight of the fish increased 88 and 183%, respectively, during the sa
Authors
Percy W. Laarman, Wayne A. Willford, James R. Olson
Temperature tolerance of young-of-the-year lake whitefish, Coregonus clupeaformis
The ultimate upper lethal temperature of young-of-the-year lake whitefish, Coregonus clupeaformis, was 26.65 C; this value is closely similar to that reported for yearling bloaters,Coregonus hoyi (26.75 C) and young-of-the-year lake herring, Coregonus artedii (26.0 C).
Authors
Thomas A. Edsall, Donald V. Rottiers
Faunal remains from archaeological sites excavated by the Central strategies in a biological and cultural transition zone: The Central Ariz. Ecotone Project, an interim report
No abstract available at this time
Authors
C. L. Douglas
Studies of bighorn in Joshua Tree National Monument
No abstract available at this time
Authors
C. L. Douglas
Behavioral interactions in North American treefrogs
No abstract available at this time
Authors
Gary M. Fellers
Populations dynamics of the cactus mouse (Peromyscus emericus) in two communities of mesquite, (Prosopis sp.), a systems approach
No abstract available at this time
Authors
J. A. Howell
Environmental stress and fish diseases: Book 5
No abstract available at this time
Authors
Gary Wedemeyer, F. P. Meyer, L. Smith
Patterns of migration of mourning doves in the western management unit
No abstract available at this time
Authors
A.K. Miles
Collection and maintenance of fishing bait from streams and ponds
No abstract available at this time
Authors
T.M. Brandt, C.B. Schreck