Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16780
Reproductive success of Potomac River ospreys, 1971
No abstract available.
Authors
Stanley N. Wiemeyer
Population trend and winter deer consumption in a Minnesota wolf pack
No abstract available.
Authors
L. D. Mech
Planning for the future survival of the California condor
No abstract available.
Authors
S.R. Wilbur
Quantitative analysis of American woodcock nest and brood habitat
Sixteen nest and 19 brood sites of American woodcock (Philohela minoI) were examined in northern lower Michigan between 15 April and 15 June 1974 to determine habitat structure associated with these sites. Woodcock hens utilized young, second-growth forest stands which were similar in species composition for both nesting and brood rearing. A multi-varIate discriminant function analysis revealed a
Authors
A. Bourgeois
Earthworm populations as related to woodcock habitat usage in Central Maine
Lumbricid earthworms were sampled 'on two central Maine study areas between late April and early September, 1974, to relate earthworm abundance to use of feeding covers by American woodcock(Philoheli minor). On sampling days, occurring at 2 to 3 week intervals, a formalin solution was applied to thirty O.25m areas in heavjly, commonly, and rarely used woodcock covers (5 samples/type of feedjngcove
Authors
J.W. Reynolds, W.B. Krohn, G.A. Hordan
Experimental woodcock management at the Moosehorn National Wildlife Refuge
The purpose of this study is to develop woodcock(Philohela minor) management techniques that can be easily used by the small landowner or incorporated with other land management operations such as commercial timber harvesting. The Moosehorn National Wildlife Refuge contains areas which are characteristic of the abandoned farms now being purchased for recreation or retirement as well as areas suita
Authors
G.F. Sepik, R.B. Owen, M.W. Coulter
Reproductive maturation and breeding of woodcock in North Carolina
Breeding woodcock (PhiJohela minor) were studied in North Carolina during the winters and springs of 1974-75 and 1975-76.. Measurements of testes and ovaries from 19 male and 30 female woodcock suggest that gonadal recrudescence in many woodcock occurs on the wintering grounds. In males, testicular recrudescence occurred as early as December and was accompanied by territory selection and courtship
Authors
R.T. Stamps, P.D. Doerr
The status and distribution of woodcock in Oklahoma
The seasonal and spatial distributions of the American woodcock (Philohela minor) in Oklahoma were determined through field surveys and the collection of all known reports of woodcock sightings. Woodcock were reported in Oklahoma in all seasons and were most Jrequently sighted from 11 October to 10 January. The peak in fall migration occurred between 11 November and 10 December. Woodcock were fo
Authors
J.S. Barclay, R.W. Smith
Effects of oil on aquatic birds
There is some evidence of the impact of direct mortality from oil spills on bird populations, but very little is known about the sublethal and indirect effects of oil on birds. Research at the Patuxent Wildlife Research Center, Laurel, Maryland, is directed at (1) determining the effects of petroleum on the physiology and reproductive success of birds, and (2) developing the analytical methodolog
Authors
P.H. Albers
Acute and chronic studies with waterfowl exposed to petroleum hydrocarbons
No abstract available.
Authors
M. P. Dieter
The importance of freshwater invertebrates and female energy reserves for black ducks breeding in Maine
No abstract available.
Authors
K. J. Reinecke