Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16743
Natural history museums and cyberspace Natural history museums and cyberspace
‘The museums have been reincarnated in electronic form.’ So say three experts from the Smithsonian Institution, who describe how the latest technologies are plunging the museum straight into the heart of the battle to safeguard biodiversity.
Authors
C. Wemmer, M. Erixon-Stanford, A. L. Gardner
Effects of Silv-Ex? on terrestrial wildlife Effects of Silv-Ex? on terrestrial wildlife
No abstract available.
Authors
N.B. Vyas, J. W. Spann, E. F. Hill
Ultrastructure of the haemocytes of Ixodes scapularis (Acari: Ixodidae) Ultrastructure of the haemocytes of Ixodes scapularis (Acari: Ixodidae)
Haemocytes of Ixodes scapularis were characterized on the basis of their ultrastructure by transmission electron microscopy of thin sections. Three types of haemocytes were identified: prohaemocytes, plasmatocytes, and granulocytes. Prohaemocytes are undifferentiated cells containing very little cytoplasm (high nucelo-cytoplasmic ratio). Plasmatocytes are rich in free ribosomes...
Authors
E. Zhioua, R.A. LeBrun, P.W. Johnson, H. S. Ginsberg
In memoriam: Robert Earl Stewart, Sr., 1913-1993 In memoriam: Robert Earl Stewart, Sr., 1913-1993
Robert Earl Stewart, Sr., our colleague, close friend, and mentor, was born on 16 April 1913 in Kansas City, Missouri. He graduated from high school in Grimes, Iowa, received his B.S. in Biology from the University of Iowa in 1936, and his M.S. in Zoology from the University of Michigan in 1937. His post-graduate work on the life history of the Common Yellow throat was published in the...
Authors
Chandler S. Robbins, M.B. Meanley
Reproduction in eastern screech-owls fed selenium Reproduction in eastern screech-owls fed selenium
Raptors are occasionally exposed to excessive selenium from contaminated prey, but the effects of this exposure on reproduction are unknown. Therefore, we fed captive eastern screech-owls (Otus asio) diets containing 0, 4.4, or 13.2 ppm (wet wt) added selenium in the form of seleno-DL-methionine. Adult mass at sacrifice and reproductive success of birds receiving 13.2 ppm selenium were...
Authors
Stanley N. Wiemeyer, David J. Hoffman
Limitations of captive breeding in endangered species recovery Limitations of captive breeding in endangered species recovery
The use of captive breeding in species recovery has grown enormously in recent years, but without a concurrent growth in appreciation of its limitations. Problems with (1) establishing self-sufficient captive populations, (2) poor success in reintroductions, (3) high costs, (4) domestication, (5) preemption of other recovery techniques, (6) disease outbreaks, and (7) maintaining...
Authors
N.F.R. Snyder, S.R. Derrickson, S.R. Beissenger, J. W. Wiley, T.B. Smith, W.D. Toone, B. Miller
Migratory bird hunting: Amended test protocol for nontoxic shot approval procedures for shot and shot coatings Migratory bird hunting: Amended test protocol for nontoxic shot approval procedures for shot and shot coatings
No abstract available.
Authors
K.A. Morehouse, Barnett A. Rattner
Review of factors affecting the distribution and abundance of waterfowl in shallow-water habitats of Chesapeake Bay Review of factors affecting the distribution and abundance of waterfowl in shallow-water habitats of Chesapeake Bay
Long-term trends of waterfowl populations in Chesapeake Bay demonstrate the importance of shallow-water habitats for waterfowl species. Although recent increases in field feeding by geese and swans lessened the importance of shallow-water areas for these species, most duck species depend almost exclusively on shallow-water habitats. Many factors influenced the distribution and abundance...
Authors
Matthew C. Perry, A.S. Deller
Leave no trace outdoor skills and ethics: An educational solution for reducing visitor impacts Leave no trace outdoor skills and ethics: An educational solution for reducing visitor impacts
No abstract available.
Authors
J. L. Marion, S.C. Brame
Recreation management in natural areas: Problems and practices, status and trends Recreation management in natural areas: Problems and practices, status and trends
No abstract available.
Authors
R.E. Manning, N.L. Ballinger, J. L. Marion
Survival of radio-collared nestling Puerto Rican parrots Survival of radio-collared nestling Puerto Rican parrots
No abstract available.
Authors
J.M. Meyers, W.J. Arendt, G.D. Lindsey
Nutritional value of winter foods for whooping cranes Nutritional value of winter foods for whooping cranes
We measured metabolizable energy and digestibility of Whooping Crane (Grus americana) winter foods (blue crab [Callinectes sapidus]), common Rangia clam (Rangia cuneata), wolfberry fruit (Lycium carolinianurn [wolfberry]), and live oak acorn (Ouercus virginiana [acorn])] with feeding trials to captive-reared Whooping Cranes. Apparent metabolizable energy coefficients (expressed as %)...
Authors
J.T. Nelson, R.D. Slack, G.F. Gee