Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16922
Retention of web tags and plasticine-filled leg bands applied to day-old ducklings Retention of web tags and plasticine-filled leg bands applied to day-old ducklings
A new plasticine-filled leg band was developed for use in banding dayold ducklings. These bands permit inference about early survival that is not possible from banding of older young in standard operations. Two double-marking experiments with web tags and the new leg bands indicated a high retention rate for the leg bands. In contrast, several web tags were lost, permitting an analysis...
Authors
Peter Blums, Aivars Mednis, James D. Nichols
Habitat use and movements of postfledging American black ducks (Anas rubripes) in the St. Lawrence estuary, Quebec Habitat use and movements of postfledging American black ducks (Anas rubripes) in the St. Lawrence estuary, Quebec
We used radiotelemetry to determine habitat use and movements of 38 female juvenile American black ducks (Anas rubripes) on the north shore of the St. Lawrence estuary, Quebec, from 28 August to 15 November 1991. Ducks separated into three groups based on habitat use: inland, estuarine, and those using a mixture of habitats. Ducks using mixed habitats used the greatest variety of habitat...
Authors
D.A. Clugston, J. R. Longcore, D.G. McAuley, P. Dupuis
Should we terminate an 'artificial,' tree-nesting raptor population in Arizona? Should we terminate an 'artificial,' tree-nesting raptor population in Arizona?
The Altar Valley in southcentral Arizona was once a iallgrass prairie. Overgrazing prevented fire and spread mesquite, allowing the area, now a savanna, to be heavily used by tree-nesting raptors in summer and heavily hunted by perch-hunting raptors in winter. The breeding raptor community (over 150 pairs) consists primarily of red-tailed hawks (Buteo jamaicensis), great horned owls...
Authors
D. H. Ellis, D.G. Smith, F.B.P. Trahan
Nutritional restriction and acid-base balance in white-tailed deer Nutritional restriction and acid-base balance in white-tailed deer
We examined the effect of progressive nutritional restriction on acid-base balance in seven captive, adult white-tailed deer (Odocoileus virginianus) from 4 February to 5 May 1988 in north central Minnesota (USA). Metabolic acidosis was indicated by low mean blood pH (7.25 to 7.33) in deer throughout the study. Mean urinary pH values declined (P = 0.020) from a mean (±SE) baseline of 8.3...
Authors
G. D. DelGiudice, L.D. Mech, U.S. Seal
Diurnal raptors in the fragmented rain forest of the Sierra Imataca, Venezuela Diurnal raptors in the fragmented rain forest of the Sierra Imataca, Venezuela
The rain forest of the Sierra Imataca in eastern Venezuela has been subjected to extensive deforestation for pastures and agricultural settlements. In the last decade the opening of access roads combined with intensified logging and mining activities have fragmented a significant portion of the remaining forest. We noted local distribution and habitat use for 40 species of diurnal...
Authors
E. Alvarez, D. H. Ellis, D.G. Smith, C.T. LaRue
Lipids and proteins in the Rathke's gland secretions of the North American mud turtle (Kinosternon subrubrum) Lipids and proteins in the Rathke's gland secretions of the North American mud turtle (Kinosternon subrubrum)
Lipids and proteins in the Rathke's gland secretions of the North American mud turtle (Kinosternon subrubrum, Kinosternidae) were analyzed by gas chromatography-mass spectrometry (GC-MS) and SDS-polyacrylamide gel electrophoresis (SDS-PAGE), respectively. Analysis by GC-MS indicates 2,3-dihydroxypropanal and C3–C24 free or esterified fatty acids. Analysis by SDS-PAGE indicates a major...
Authors
W.E. Seifert, S.W. Gotte, T.L. Leto, P.J. Weldon
Sediment mixing-depths on a low-energy reflective beach Sediment mixing-depths on a low-energy reflective beach
No abstract available.
Authors
D.J. Sherman, K.F. Nordstrom, N.L. Jackson, J.R. Allen
Hurricane Andrew: The 1992 hurricane allowed scientists to assess damage and consider long-term consequences to well-studied ecosystems Hurricane Andrew: The 1992 hurricane allowed scientists to assess damage and consider long-term consequences to well-studied ecosystems
No abstract available.
Authors
S. L. Pimm, G. Davis, L. Loope, C. T. Roman, T.J. Smith, J. Tilmant
Day users in the backcountry: The neglected park visitor Day users in the backcountry: The neglected park visitor
No abstract available.
Authors
J.W. Roggenbuck, J. L. Marion, R.E. Manning
Labrador retriever assists in ecological research for the NPS Labrador retriever assists in ecological research for the NPS
No abstract available.
Authors
A.F. O'Connell
Timing of breeding and molting in six species of Hawaiian honeycreepers Timing of breeding and molting in six species of Hawaiian honeycreepers
The timing of breeding and molting was studied in six species of Hawaiian honeycreepers with differing food habits on the Island of Hawaii. The availability of nectar was highly seasonal, whereas insect abundance was relatively constant throughout the year. All six species of honeycreeper had extended breeding and molting periods with peak breeding between April and July and peak molting...
Authors
C.J. Ralph, S.G. Fancy