Land use and land cover digital data from 1:250,000- and 1:100,000- scale maps
Water Resources Division, U.S. Geological Survey
1990, Data Users Guide 4
The Earth Science Information Centers (ESIC) distribute digital cartographic/geographic data files produced by the U.S. Geological Survey (USGS) as part of the National Mapping Program. The data files are grouped into four basic types. The first type, called a Digital Line Graph (DLG), is line map information in digital form....
Whole body and tissue blood volumes of two strains of rainbow trout (Oncorhynchus mykiss)
W.H. Gingerich, R.A. Pityer, J.J. Rach
1990, Comparative Biochemistry and Physiology, Part A: Molecular & Integrative Physiology (97) 615-620
1. Estimates of apparent packed cell, plasma and total blood volumes for the whole body and for 13 selected tissues were compared between Kamloops and Wytheville strains of rainbow trout (Oncorhynchus mykiss) by the simultaneous injection of two vascular tracers, radiolabeled trout erythrocytes (51Cr-RBC) and radioiodated bovine serum albumin (125I-BSA).2....
Water resources data, New Mexico, water year 1989
Water Resources Division, U.S. Geological Survey
1990, Water Data Report NM-89
This annual hydrologic data report of New Mexico is one of a series of annual reports that document hydrologic data gathered frOm the u.s. Geological Survey's surface- and ground-water data-collection networks in each State, Puerto Rico, and the Trust Territories. These records of streamflow, ground-water levels, and water quality provide the...
Feeding fish to reduce phosphorus in hatchery effluents
H. G. Ketola
1990, Salmonid (14) 10-10
Remagnetization and northward coastwise transport of Franciscan Complex rocks, northern California: A reinterpretation of the paleomagnetic data
Jonathan T. Hagstrum
1990, Tectonics (9) 1221-1233
Previous paleomagnetic studies of accreted oceanic rocks within the Franciscan Complex of northern California have concluded that these rocks originated far to the south of their present positions with respect to the North American continent. Based on positive “fold” tests, the characteristic remanent magnetizations were inferred to predate accretion-related deformation...
The age of the Keystone thrust: Laser-fusion 40Ar/39Ar dating of foreland basin deposits, southern Spring Mountains, Nevada
Robert J. Fleck, Michael D. Carr
1990, Tectonics (9) 467-476
Nonmarine sedimentary and volcaniclastic foreland-basin deposits in the Spring Mountains of southern Nevada are cut by the Contact and Keystone thrusts. These synorogenic deposits, informally designated the Lavinia Wash sequence by Carr (1980), previously were assigned a Late Jurassic to Early Cretaceous(?) age. New 40Ar/39Ar laserfusion and incremental-heating studies of a...
Lead hazards within the range of the California condor
O. H. Pattee, P.H. Bloom, J. M. Scott, M. R. Smith
1990, Condor (92) 931-937
The prevalence of lead in Golden Eagles (Aquila chrysaetos) occurring within the recent historical range of the California Condor (Gymnogyps californianus) was determined by analyzing blood samples from 162 Golden Eagles captured between June 1985 and December 1986 at three sites. We found no significant differences between sex and age...
Geographic variation in the yellow-billed cuckoo: Corrections and comments
Richard C. Banks
1990, Condor (92) 538-538
No abstract available....
Phrynops geoffroanus tuberosus (Geoffroy's Sideneck Turtle)
R.P. Reynolds
1990, Herpetological Review (21) 40
Breeding bird census: 34. Isolated oak-tuliptree-pine upland forest
C.S. Robbins
1990, Journal of Field Ornithology (61) 50-51
Breeding biology of the spotted salamander Ambystoma maculatum (Shaw) in acidic temporary ponds at Cape Cod, USA
J. W. Portnoy
1990, Biological Conservation (53) 61-75
The relationship between water chemistry and breeding success of spotted salamanders Ambystoma maculatum (Shaw) was examined in temporary woodland ponds on outer Cape Cod, Massachusetts in 1985 and 1986. Most pond waters were dilute (3median coductivity = 57 umhos cm−1 (1 umhos cm−1 = 0·1 mSm−1)), acidic (median pH = 4·82), and highly colored...
Geographic distribution of Micronycteris schmidtorum Sanborn (Chiroptera: Phyllostomidae)
C.E. Ascorra, D.E. Wilson, A. L. Gardner
1990, Proceedings of the Biological Society of Washington (104) 351-355
Primary productivity of angiosperm and macroalgae dominated habitats in a New England salt marsh: a comparative analysis
C. T. Roman, K.W. Able, M.A. Lazzari, K.L. Heck
1990, Estuarine, Coastal and Shelf Science (30) 35-45
Net primary productivity estimates were made for the major macrophyte dominated habitats of the Nauset Marsh system, Cape Cod, Massachusetts. Above-ground primary productivity of short form Spartina alterniflora, the dominant habitat of the system, was 664 g m-2 y-1. Productivity of the other dominant angiosperm (Zostera marina) was estimated to...
A tracer study of sediment transport in the vicinity of a groin, New York, USA
D.J. Sherman, B.O. Bauer, K.F. Nordstrom, J.R. Allen
1990, Journal of Coastal Research (6) 427-438
Recent population trends of the eastern bluebird
J.R. Sauer, Sam Droege
1990, The Wilson Bulletin (102) 239-252
North American Breeding Bird Survey data for the period 1966-1987 indicate that Eastern Bluebird (Sialia sialis) populations declined during the 1970s, primarily in association with either severe winters or severe spring storms. In recent years, bluebird populations have increased to levels similar to those observed during the first year...
In memoriam, Erma J. Fisk (1905-1990)
C.S. Robbins
1990, Bird Watcher's Digest (12) 94-95
The ninetieth Christmas bird count. Georgia, Florida
P.W. Sykes Jr.
1990, American Birds (44) 539-542
Selenium in wetlands and waterfowl foods at Kesterson Reservoir, California, 1984
Carol Schuler, Robert G. Anthony, Harry M. Ohlendorf
1990, Archives of Environmental Contamination and Toxicology (19) 845-853
Kesterson Reservoir (Kesterson) received subsurface agricultural drainwater containing high levels of salts and selenium from farmland in the San Joaquin Valley of California. The accumulation of selenium in wetlands and waterfowl foods at Kesterson was investigated during May, August, and December of 1984. High concentrations of selenium were found in...
Comparisons of patch-use models for wintering American tree sparrows
M.W. Tome
1990, The Auk (107) 210-211
Optimal foraging theory has stimulated numerous theoretical and empirical studies of foraging behavior for >20 years. These models provide a valuable tool for studying the foraging behavior of an organism. As with any other tool, the models are most effective when properly used. For example, to obtain a robust test...
Breeding bird census: 12. Isolated moist tuliptree-red maple upland forest
C.S. Robbins
1990, Journal of Field Ornithology (61) 35-36
Annual variation in foraging ecology of prothonotary warblers during the breeding season
L. J. Petit, D. R. Petit, K.E. Petit, W. James Fleming
1990, The Auk (107) 146-152
We studied foraging ecology of Prothonotary Warblers (Protonotaria citrea) along the Tennessee River in west-central Tennessee during the breeding seasons of 1984-1987. We analyzed seven foraging variables to determine if this population exhibited annual variation in foraging behavior. Based on nearly 3,000 foraging maneuvers, most variables showed significant interyear variation...
Intersexual and temporal variation in foraging ecology of prothonotary warblers during the breeding season
L. J. Petit, D. R. Petit, K.E. Petit, W. James Fleming
1990, The Auk (107) 133-145
We studied foraging ecology of Prothonotary Warblers (Protonotaria citrea) over four breeding seasons to determine if this species exhibited sex-specific or temporal variation in foraging behavior. Significant differences between sexes during the prenestling period were found for foraging height and substrate height (foraging method, plant species/substrate, perch diameter, horizontal location...
Evaluation of three miniature radio transmitter attachment methods for small passerines
P.W. Sykes Jr., J. W. Carpenter, S. Holzman, P.H. Geissler
1990, Wildlife Society Bulletin (18) 41-48
Thirty-two immature common yellowthroats were used to evaluate three methods of attaching radio transmitters to the backs of small passerines: adhesive, velcro, and harness. There were no significant differences between the three methods; however, the adhesive method of transmitter attachment to small birds was found to be the...
Taxonomic status of the coquette hummingbird of Guerrero, Mexico
Richard C. Banks
1990, The Auk (107) 191-192
An isolated population of small hummingbirds in the state of Guerrero, Mexico, was originally named as a subspecies (brachylopha) of the much more southerly Lophornis delattrei, the Rufous-crested Coquette (Moore 1949). The form was not reported again until rediscovered by Ornelas (1987) and remains known by only three male...
The influence of social and endocrine factors on urine-marking by captive wolves (Canis lupus)
C. S. Asa, L.D. Mech, U.S. Seal, E.D. Plotka
1990, Hormones and Behavior (24) 497-509
Although serum hormones varied seasonally in all adult animals, only dominant male and female wolves urine-marked. Serum testosterone and urine-marking rates, which increased during the fall/winter breeding season, were positively correlated in both male and female dominant wolves. Estradiol, which increased in conjunction with proestrus and estrus, was not correlated...
