Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16785
Nest-site biology of the California condor
A study of 72 historical and recent nests of the California Condor (Gymnogyps californianus) has revealed considerable variability in nest-site characteristics. This paper primarily summarizes the data on nest elevations and dimensions, entrance orientations, nest longevity and re-use, vulnerability of sites to natural enemies, and use of sites by other species. Although all known nests have been
Authors
N.F.R. Snyder, R.R. Ramey, F.C. Sibley
Differences in mortality among bobwhite fed methylmercury chloride dissolved in various carriers
Twelve-day-old bobwhite chicks were fed a diet containing 0, 5.4 or 20 ppm methylmercury chloride. The methylmercury chloride was added to the diet either in a dry, pulverized form or dissolved in acetone, propylene glycol or corn oil. Mortality was measured for 6 weeks, and samples of liver were saved for mercury analysis. Mortality was significantly lower in birds fed 20 ppm methylmercury chlori
Authors
J. W. Spann, G. H. Heinz, M.B. Camardese, E. F. Hill, John F. Moore, H. C. Murray
Reproduction and health of mallards fed endrin
Concentrations of 0, 1 and 3 ppm endrin in dry duck mash were fed to mallards (Anas platyrhynchos) starting in December, and health and reproduction were measured the following spring and summer. One male fed 3 ppm endrin died with 2.0 ppm endrin (wet weight), a diagnostically lethal level, in its brain. Birds fed 1 ppm endrin reproduced as well as, if not better than, controls. Birds fed 1 ppm en
Authors
J. W. Spann, G. H. Heinz, C.S. Hulse
Trace elements in sediments, water, and American coots (Fulica americana) at a coal-fired power plant in Texas, 1979-1982
No abstract available.
Authors
D. H. White, K. A. King, C. A. Mitchell, B. M. Mulhern
Environmental contaminants in surrogates, foods, and feathers of California condors (Gymnogyps californianus)
California condor (Gymnogyps californianus) foods and feathers, and turkey vultures (Cathartes aura), common ravens (Corvus corax), and their eggs were collected within the condor range to determine exposure of condors to environmental contaminants. Samples were analyzed for organochlorines and trace elements. Food items contained low concentrations of organochlorines and generally low concentrati
Authors
Stanley N. Wiemeyer, R.M. Jurek, John F. Moore
[Book review] Birds of the Cayman Islands by Patricia Bradley
No abstract available.
Authors
J. W. Wiley
Response: Evidence for selection of old trees by red-cockaded woodpeckers
No abstract available.
Authors
B.K. Williams, R. Field
Frozen gene pools - A future for species otherwise destined for extinction
Conclusion: Semen banks and ova and embryo banks can be practical methods to maintain gene pools. Gene pool preservation is desperately needed today due to the rapid decline in number of species and their habitat, a matter that is of concern to.biologists, economists, and politicians worldwide. Techniques are available for the cryopreservation of semen from many animals (and embryos from a few mam
Authors
G.F. Gee
Bird-borne satellite transmitter and location program
No abstract available.
Authors
T.E. Strikwerda, M.R. Fuller, W.S. Seegar, P.W. Howey, H.D. Black
Depression of plasma luteinizing hormone concentration in quail by the anticholinesterase insecticide parathion
1. To examine the effects of parathion on basal plasma luteinizing hormone (LH) concentration, male Japanese quail (Coturnix japonica) were orally intubated with 0, 5 or 10 mg/kg parathion and sacrificed after 4, 8 and 24 hr.2. At the 5 mg/kg dose, plasma LH levels were reduced at 4 and 8 hr, but returned to control values by 24 hr. Brain acetylcholinesterase activity was substantially reduced by
Authors
Barnett A. Rattner, R.N. Clarke, M. A. Ottinger