Recent increases in atmospheric deposition of mercury to North-Central Wisconsin lakes inferred from sediment analyses
R.G. Rada, J.G. Wiener, M.R. Winfrey, D.E. Powell
1989, Archives of Environmental Contamination and Toxicology (18) 175-181
Profiles of total mercury (Hg) concentrations in sediments were examined in 11 lakes in north-central Wisconsin having a broad range of pH (5.1 to 7.8) and alkalinity (-12 to 769 μeq/L). Mercury concentrations were greatest in the top 15 cm of the cores and were much lower...
Comparison of whole body and tissue blood volumes in rainbow trout (Salmo gairdneri) with 125I bovine serum albumin and 51Cr-erythrocyte tracers
W.H. Gingerich, R.A. Pityer
1989, Fish Physiology and Biochemistry (6) 39-47
Total, packed cell and, plasma volume estimates were made for the whole body and selected tissues of rainbow trout by the simultaneous injection of radiolabelled trout erythrocyte (51Cr-RBC) and radioiodinated bovine serum albumin (125I-BSA) tracers. Blood volumes were estimated with both markers separately by the tracer-hematocrit method and as the...
Plasma catecholamine concentrations in rainbow trout (Salmo gairdneri) at rest and after anesthesia and surgery
W.H. Gingerich, K.R. Drottar
1989, General and Comparative Endocrinology (73) 390-397
The effects of surgery and anesthesia on concentrations of plasma epinephrine (E), norepinephrine (NE), and dopamine (DA) were investigated in rainbow trout fitted with dorsal aorta cannulae. Baseline catecholamines (CA) concentrations, established in resting rainbow trout, were 1.55 ± 0.90 ϱmol/ml (X ± SD) for E, 2.07 ± 1.26 for...
Gill tissue reactions in walleye Stizostedion vitreum vitreum and common carp Cyprinus carpio to glochidia of the freshwater mussel Lampsilis radiata siliquoidea
D. L. Waller, L. G. Mitchell
1989, Diseases of Aquatic Organisms (6) 81-87
The glochidia of many freshwater mussels, which are obligate parasites on the gills, fins, and other body parts of specific fishes, attach to a suitable host, become encapsulated, and develop to the free-living juvenile stage. Using light and electron microscopy we compared gill tissue reactions in a suitable host (walleye...
Digital line graphs from 1:100,000-scale maps
Water Resources Division, U.S. Geological Survey
1989, Data Users Guide 2
The National Cartographic Information Center (NCIC) distributes digital cartographic/geographic data files produced by the U.S. Geological Survey (USGS) as part of the National Mapping Program. Digital cartographic data files may be grouped into four basic types. The first of these, called a Digital Line Graph (DLG), is line map information...
Diel drift of Chironomidae larvae in a pristine Idaho mountain stream
L. J. Tilley
1989, Hydrobiologia (174) 133-149
Simultaneous hourly net collections in a meadow and canyon reach of a mountain stream determined diel and spatial abundances of drifting Chironomidae larvae. Sixty-one taxa were identified to the lowest practical level, 52 in the meadow and 41 in the canyon. Orthocladiinae was the most abundant subfamily with 32 taxa...
The North American Midcontinent rift beneath Lake Superior from GLIMPCE seismic reflection profiling
W.F. Cannon, Alan G. Green, D. R. Hutchinson, Myung W. Lee, Bernd Milkereit, John C. Behrendt, Henry C. Halls, J.C. Green, Albert B. Dickas, G. B. Morey, Richard Sutcliffe, C. Spencer
1989, Tectonics (8) 305-332
The Midcontinent rift system is a 1.1-b.y.-old structure extending from Kansas, through the Lake Superior region, and into southern Michigan. The rift is filled with thick sequences of basaltic volcanic rocks and clastic sediments. For most of its extent it is buried beneath Paleozoic rocks but can be traced by...
Taconic plate kinematics as revealed by foredeep stratigraphy, Appalachian orogen
D. C. Bradley
1989, Tectonics (8) 1037-1049
Destruction of the Ordovician passive margin of eastern North America is recorded by an upward deepening succession of carbonates, shales, and flysch. A compilation of the age of shelf drowning (carbonate-to-shale transition) reveals the degree to which orogeny was diachronous both across and along strike. Shelf drowning occurred first at...
The evolution of forearc structures along an oblique convergent margin, central Aleutian Arc
Holly F. Ryan, D.W. Scholl
1989, Tectonics (8) 497-516
Multichannel seismic reflection data were used to determine the evolutionary history of the forearc region of the central Aleutian Ridge. Since at least late Miocene time this sector of the ridge has been obliquely underthrust 30° west of orthogonal convergence by the northwestward converging Pacific plate at a rate of...
The style of late Cenozoic deformation at the eastern front of the California Coast Ranges
Carl M. Wentworth, Mark D. Zoback
1989, Tectonics (8) 237-246
The 1983 Coalinga earthquake occurred at the eastern boundary of the California Coast Ranges in response to northeast directed thrusting. Such movements over the past 2 Ma have produced Coalinga anticline by folding above the blind eastern tip of the Coalinga thrust zone. The 600-km length of the Coast Ranges...
Concern grows for light-footed clapper rail
J. W. Wiley, R. Zembal
1989, Endangered Species Technical Bulletin (14) 6-7
Wolf longevity in the wild
L.D. Mech
1989, Endangered Species Technical Bulletin (14) 8
Additional records of birds from Cat Island, Bahamas
W.J. Howe, D.M. Taylor, David A. Jett
1989, The Wilson Bulletin (101) 115-117
During 11-15 March 1986, we visited Cat Island in the Bahamas. Here we report on 27 species of birds whose status on Cat Island is poorly known, including eight for which no pervious records exist....
Model-based estimates of annual survival rate are preferable to observed maximum lifespan statistics for use in comparative life-history studies
D.G. Krementz, J.R. Sauer, J.D. Nichols
1989, Oikos (56) 203-208
Estimates of longevity are available for many animals, and are commonly used in comparative life-history analyses. We suggest that annual survival rate is a more appropriate life history parameter for most comparative life history analyses. Observed maximum lifespans estimate complicated functions of survival and sampling probabilities. Annual survival rate estimates...
An improved method to monitor nest attentiveness using radio-telemetry
D.S. Licht, D.G. McAuley, J. R. Longcore, G.F. Sepik
1989, Journal of Field Ornithology (60) 251-258
An improved method of automatically monitoring nest attentiveness was designed and tested using radio-equipped American Woodcock (Scolopax minor). Shielded coaxial cable (RG-58) was extended from a receiver and placed 30 cm above the nest, with a 3.8 cm section of the inner wire exposed. Presence, absence, and activity of birds...
Evaluating recreation impacts: A multi-faceted research design
J. L. Marion, D.N. Cole
1989, Park Science (9) 23-24
Longevity records of North American birds. Supplement 1
M. K. Klimkiewicz, A.G. Futcher
1989, Journal of Field Ornithology (60) 469-494
This is the first supplement to the previous published four-part series on avian longevities (Clapp et al. 1982, 1983; Klimkiewicz et al. 1983; Klimkiewicz and Futcher 1987). R ecords processed in the Bird Banding Laboratory through August 1988 are included, as well as several corrections to the original series. One...
Growth and fatbody cycles in feral populations of the African clawed frog, Xenopus laevis (Pipidae), in California with comments on reproduction
M. J. McCoid, T. H. Fritts
1989, Southwestern Naturalist (34) 499-505
Feral populations of the African clawed frog (Xenopus laevis) exist in several areas of southern California. By following the first cohort of progeny produced by African clawed frogs at a recently colonized site, data on the growth rates and age at first maturity were obtained in field conditions. Females reached...
Stubborn hunter in a harsh land
L.D. Mech
1989, National Wildlife (27) 20-24
About 110 wolves in 13 packs inhabit Denali National Park. Pack sizes vary from 2 to 15 in winter, and minimum pack territory sizes range from 250 to 805 square miles....
The relationship between body mass and annual survival in American Black Ducks
D.G. Krementz, J.E. Hines, P.O. Corr, Ray B. Owen
1989, Ornis Scandinavica (20) 81-85
No abstract available. ...
Food habits and organochlorine contaminants in the diet of olivaceous cormorants in Galveston Bay, Texas
Kirk A. King
1989, Southwestern Naturalist (34) 338-343
More than 1,000 food items, representing 32 species of fish and one invertebrate, were identified from olivaceous cormorants. Six species of fish comprised 79% of the diet by frequency of occurrence and 78% by weight. Almost half of the diet consisted of a single species, the sheepshead minnow....
Food habits and organochlorine contaminants in the diet of black skimmers, Galveston Bay, Texas, USA
Kirk A. King
1989, Colonial Waterbirds (12) 109-112
More than 500 food items of nestling Black Skimmers were identified representing 18 species of fish and 2 invertebrates. DDE and poly-chlorinated biphenyls (PCBs) were the only contaminants consistently detected in the black skimmer diet, carcass, and egg samples. Eggs contained 14 times the level of PCBs detected...
Aspects of the reproductive ecology and behavior of the tepui toads, genus Oreophrynella (Anura: Bufonidae)
R.W. McDiarmid, S. Gorzula
1989, Copeia (1989) 445-451
We report direct development for toads of the bufonid genus Oreophrynella, endemic to the tepuis of the Guayanan Highlands. Tepui toads place few (9-13), large (-3 mm diameter) eggs in a single or communal terrestrial nest. One communal nest found on Kukenan-tepui contained 102 toads (70 males, 30 females, 2...
Benefits, costs, and determinants of dominance in American black ducks
Gary R. Hepp
1989, Behaviour (109) 222-234
Behavioural dominance was studied in captive American black ducks (Anas rubripes) during October-December 1984. Eighty ducks were marked individually, and groups of 10 ducks consisting of 5 adults (3 males and 2 females) and 5 juveniles (3 males and 2 females) were assigned to each of 8 experimental pens. Ducks...
Sex and storage affect cholinesterase activity in blood plasma of Japanese quail
E. F. Hill
1989, Journal of Wildlife Diseases (25) 580-585
Freezing at -25?C had confounding effects on cholinesterase (ChE) activity in blood plasma from breeding female quail, but did not affect ChE activity in plasma from males. Plasma ChE activity of control females increased consistently during 28 days of storage while both carbamate- and cidrotophos-inhibited ChE decreased. Refrigeration...
