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Page 5519, results 137951 - 137975

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Publication Extents

Not all publications have extents, not all extents are completely accurate
DDT contamination at Wheeler National Wildlife Refuge
T. J. O'Shea, W.J. Fleming III, E. Cromartie
1980, Science (209) 509-560
Disposal of industrial waste resulted in massive DDT contamination at Wheeler National Wildlife Refuge, Alabama. Nearly a decade after the cessation of DDT manufacturing at the facility responsible, concentrations of DDT residues in the local fauna are still high enough to suggest avian reproductive impairment and mortality....
Atlantic Flyway review: Region V
Chandler S. Robbins
1980, North American Bird Bander (5) 31-36
Four of last year's Maryland stations were either discontinued or banded too few birds to report their results in 1978; these were Cloisters in Baltimore County, Cylburn in Baltimore City, tum Suden Sanctuary in Harford County, and Sandy Point State Park in Anne Arundel County. Banding was severely curtailed at...
A variable circular-plot method for estimated bird numbers
R.T. Reynolds, J. M. Scott, R.A. Nussbaum
1980, Condor (82) 309-313
A bird census method is presented that is designed for tall, structurally complex vegetation types, and rugged terrain. With this method the observer counts all birds seen or heard around a station, and estimates the horizontal distance from the station to each bird. Count periods at stations vary...
Predictions of future Nearctic landbird vagrants to Europe
C.S. Robbins
1980, British Birds (73) 448-457
Migratory habits of 3I species of vagrants from North America and 73 candidate species not recorded In elther Bntain or Ireland during the 30 years 1947-76 were analysed by multiple regresslon. There was a sIgnificant correlation between the number of British and Irish records and the west-to-east component of normal...
Computer simulation models as tools for identifying research needs: A black duck population model
J.K. Ringelman, J. R. Longcore
1980, Transactions of the Northeast Section of the Wildlife Society, Annual Fish and Wildlife Conference (37) 182-193
Existing data on the mortality and production rates of the black duck (Anas rubripes) were used to construct a WATFIV computer simulation model. The yearly cycle was divided into 8 phases: hunting, wintering, reproductive, molt, post-molt, and juvenile dispersal mortality, and production from original and renesting attempts. The program computes...
Masked mustelid
C. N. Hillman, J. W. Carpenter
1980, Nature Conservancy News (30) 20-23
Atlantic brant--human commensalism on eelgrass beds in New Jersey
R.E. Kirby, H.H. Obrecht III
1980, Wildfowl (31) 158-160
Atlantic Brant Branta bernicla hrota in Barnegat Bay, New Jersey, have established a commensal feeding relationship with man. Small flocks feed 3-5 m from clam fishermen on Zostera torn from the sea bottom by the fishing activities. Background material on the availability and digestibility of different brant foods is presented....
Sleeping distance in wild wolf packs
S.T. Knick, L.D. Mech
1980, Behavioral and Neural Biology (28) 507-511
Sleeping distances were observed among members of 13 wild wolf (Canis lupus) packs and 11 pairs in northeastern Minnesota to determine if the distances correlated with pack size and composition. The study utilized aerial radio-tracking and observation during winter. Pack size and number of adults per pack were...
Demography of the Everglade kite: Implications for population management
J.D. Nichols, Gary L. Hensler, P.W. Sykes Jr.
1980, Ecological Modelling (9) 215-232
Simple deterministic and stochastic population modelsi are used to examine the demographic patterns of the Everglade Kite population. These efforts are directed at making inferences about the evolution of the kite life-history pattern, and at providing guidelines for the management of the kite population. The Everglade Kite has...
Secondary poisoning of owls by anticoagulant rodenticides
Vivian M. Mendenhall, L.F. Pank
1980, Wildlife Society Bulletin (8) 311-315
Anticoagulants-compounds that prevent clotting of the blood-are extensively used for control of small mammal pests. The potential secondary hazards of 6 anticoagulant rodenticides to birds of prey were examined in this study. Whole rats or mice were killed with each anticoagulant and were fed to 1-3 species of owls. Owls...
Sex-specific differences in winter distribution patterns of canvasbacks
J.D. Nichols, G.M. Haramis
1980, Condor (82) 406-416
Winter band recovery distributions of North American Canvasbacks (Aythya valisineria) suggested that males and females exhibit comparable degrees of fidelity to general wintering areas. Of birds banded during the winter, the proportion of males was found to be higher in northern than in southern areas. Winter band recovery...
Factors affecting waterfowl breeding density and productivity estimates in the Northeast
J. R. Longcore, J.K. Ringelman
1980, Transactions of the Northeast Section of the Wildlife Society, Annual Fish and Wildlife Conference (37) 169-181
During 1977-79, information useful for making breeding pair and brood surveys was obtained while studying black duck (Anas rubripes) habitat selection and productivity in south-central Maine. Surveys should be initiated in relation to sunrise and sunset time. Morning versus evening counts, familiarity with the survey area, wetland dynamics of the...
Consistency in habitat preference of forest bird species
B.R. Noon, D.K. Dawson, D.B. Inkley, C.S. Robbins, S.H. Anderson
1980, Transactions of the North American Wildlife and Natural Resources Conference (45) 226-244
The important management conclusion that follows from our results is that the habitat requirements of most forest bird species, although quite specific for each species, apply generally throughout their breeding ranges. Thus a habitat management program that proves beneficial in one part of the breeding range of a species...