Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16785
This week?s Citation Classic: 'Stickel, L. F. A comparison of certain methods of measuring ranges of small mammals. J. Mammalogy 35: 1-15, 1954.'
During my first employment as a junior biologist conducting food habits analyses at the Patuxent Research Refuge (now Patuxent Wildlife Research Center) of the US Fish and Wildlife Service, the first station director, Arnold L. Nelson, gave each staff biologist the opportunity to spend a little time conducting field studies on the 2,600-acre research area. These studies were to help in ecological
Authors
L. F. Stickel
Chemical scent constituents in urine of wolf (Canis lupus) and their dependence on reproductive hormones
The volatile components of castrated male and ovariectomized female wolf urine were investigated and correlated with the administration of testosterone or estradiol and progesterone. The results indicate that testosterone induces in the castrated male the formation of some compounds typically associated with the intact male, while reducing the levels of some compounds associated with castrated mal
Authors
J. Raymer, D. Wiesler, M. Novotny, C. Asa, U. S. Seal, L. D. Mech
[Book review] Status and conservation of the world's seabirds, edited by J.P. Croxall, P.G.H. Evans, and R.W. Schreiber
No abstract available.
Authors
R. B. Clapp
[Book review] The new guide to the birds of New Zealand. R.A. Falla, R.B. Sibson & E.G. Turbott. 1982
No abstract available.
Authors
R. B. Clapp
Metal residues in bat colonies, Jackson County, Florida, 1981-1983
No abstract available.
Authors
D. R. Clark, A.S. Wenner, John F. Moore
A re-examination of biomagnification of metals in terrestrial food chains
No abstract available.
Authors
W. N. Beyer
[Letter to the editor: Comment on 'Susan Lane's Suburban Flights']
No abstract available.
Authors
R. R. Gabel
Selenium and heavy metals in San Francisco Bay diving ducks
We analyzed for selenium (Se) and heavy metals in greater scaups (Aythya marila) and surf scoters (Melanitta perspicillata) collected from southern San Francisco Bay in March and April 1982. There were no differences (P > 0.05) between species for liver concentrations of silver (Ag), mercury (Hg), or lead (Pb). Copper (Cu) (P < 0.001) and zinc (Zn) (P < 0.01) levels were higher in scaups, whereas
Authors
H. M. Ohlendorf, Roy W. Lowe, P.R. Kelly, T.E. Harvey
[Book review] Bobwhites in the Rio Grande Plain of Texas, by V.W. Lehmann, Texas A&M University Press, College Station
No abstract available.
Authors
M. C. Perry
Blood chemistry and hematocrit of captive and wild canvasbacks
Blood chemistry and packed cell volume (PCV) did not vary among groups of captive canvasbacks (Aythya valisineria) maintained ad libitum on 5 diets varying in metabolizable energy (ME) and protein. Ducks fed low quality diets increased their consumption so that all ducks were obtaining similar amounts of energy and protein. Some variables, including cholesterol, were found to differ between the se
Authors
M. C. Perry, H.H. Obrecht, B.K. Williams, W.J. Kuenzel
Influence of nutrients on feed intake and condition of captive canvasbacks in winter
Dramatic changes in the food habits and distribution of canvasbacks (Aythya valisineria) in Chesapeake Bay during the 1970's generated a need to evaluate the nutritional value of food items and the requirements of this species on its wintering grounds. Groups of captive canvasbacks were maintained ad libitum on 5 diets during the winters of 1978-79 and 1979-80 to evaluate the effects of varying pr
Authors
M. C. Perry, W.J. Kuenzel, B.K. Williams, J.A. Serafin