Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16784
Leucocytozoonosis in Canada Geese at the Seney National Wildlife Refuge
A history is given of the Seney National Wildlife Refuge and the losses of goslings of Canada geese (Branta canadensis) recorded since inception of the refuge in 1935. Since 1960, when more reliable data became available, losses have been extensive every 4 years. Gosling deaths are attributed to the infection with Leucocytozoon simondi. The blackfly (Simulium innocens) is considered to be the p
Authors
C. M. Herman, J.H. Barrow, I.B. Tarshis
Hepatic microsomal N-oxidation and N-demethylation of N,N-dimethylaniline in red-winged blackbird compared with rat and other birds
Hepatic microsomes prepared from red-winged blackbirds and albino rats were incubated with N,N-dimethylaniline (DMA)_in complete incubation mixtures at pH 7.9 and 37?C for 10 min. Formaldehyde and N,N-dimethylaniline--oxide produced from DMA were measured. Redwings were found to have significantly lower N-demethylation activities than rats, and redwings had only marginal or no N-oxidation activi
Authors
H.P. Pan, J.R. Fouts, T.R. Devereux
Emperor penguins nesting on Inaccessible Island
Emperor penguins were observed nesting on Inaccessible I. during the 1973 winter. This is the southernmost nesting of emperor penguins thus far recorded; it also could be the first record of emperors attempting to start a new rookery. This site, however, may have been used by emperors in the past. The closest reported nesting of these penguins to Inaccessible I. is on the Ross Ice Shelf east of Ca
Authors
G.M. Jonkel, G.A. Llano
Effects of monocrotophos and fenthion on discrimination acquisition and reversal in northern bobwhite (Colinus virginianus)
Adult male northern bobwhite (Colinus virginianus) were fed diets containing organophosphorus pesticides, and the birds' discrimination acquisition and reversal performance was evaluated. The birds received the pesticide-laced diets continually, beginning 2 d before behavioral testing and ending after the birds completed the test series consisting of an acquisition and 10 reversals. Bobwhites fed
Authors
C.S. Robbins
[Book review] Helping and communal breeding in birds: ecology and evolution by Jerram L. Brown
No abstract available.
Authors
C.S. Robbins
The toxicity of p,p'-DDT to the clapper rail
The LC50 (concentration of toxicant in the diet expected to kill half of the test birds in 5 days) for p,p' -DDT in clapper rails (Rallus longirostris) was found to be 1,612 ppm for males and 1,896 ppm for females. Amounts of DDT + DDD in the brains of birds that died were significantly greater (P < 0.01) than those in the brains of survivors. Thirty ppm DDT + DDD approximated the lower limit of
Authors
A. Van Velzen, J.F. Kreitzer
Effects of environmental pollutants on Connecticut and Maryland ospreys
Osprey (Pandion haliaetus) eggs were exchanged between Connecticut and Maryland osprey nests in 1968 and 1969 to test the hypothesis that the decline in reproductive success of Connecticut ospreys was caused by something within the external environment of the eggs. Incubation of 30 Connecticut osprey eggs by Maryland ospreys did not improve the hatching rate. Forty-five Maryland osprey eggs incu
Authors
Stanley N. Wiemeyer, P.R. Spitzer, W.C. Krantz, T. G. Lamont, E. Cromartie
California condor plumage and molt as field study aids
An analysis is made of the reliability of plumage and molt characteristics of the California condor for estimating age and identifying individual birds. Neither character seems sufficiently reliable to use in more than a general way.
Authors
S.R. Wilbur