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Page 6365, results 159101 - 159125

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Incidence of malaria in a wintering population of canvasbacks (Aythya valisineria) on Chesapeake Bay
R. M. Kocan, J.O. Knisley
1970, Journal of Wildlife Diseases (6) 441-442
Canvasback ducks wintering on Chesapeake Bay had a 6% incidence of Leucocytozoon sirnondi and 2% incidence of Haemoproteus. Sub-inoculation of whole blood into Pekin ducklings produced a Plasmodium infection rate of 31%. Females were more frequently infected (12/22) than males (15/68). The parasite was identified as P. circumflexum....
Passive immunization of pigeons against trichomoniasis
R. M. Kocan
1970, Journal of Protozoology (17) 551-553
Nonimmune homing pigeons Columba livia were infected with the Jones' Barn strain of Trichomonas gallinae and subsequently transfused with plasma from acute or chronically infected pigeons harboring one of 3 different strains of T. gallinae. The transfusions were either a single 2 ml dose given one day after inoculation or three 1 ml doses given 0,...
Head-scratching method of the Swainson's warbler
Brooke Meanley
1970, The Auk (87) 163-163
Ficken and Ficken (Auk, 85: 136, 1968) suggest that the "Head-scratching method may prove a valuable addition to the set of complex characters that can be used in defining genera," and that field observers should continue to fill gaps in our knowledge of this behavior. In the course of a...
Active anting in the Puerto Rican tanager
W.B. King, C. B. Kepler
1970, The Auk (87) 376-378
Anting, a bird’s intentional exposure of its body surface to chemical substances secreted by ants or other agents, has been recorded in over 20 species of birds of 40 families, mostly within the order Passeriformes. Our observations of anting in the Puerto Rico tanager (Neospingus speculiferus) extend the phenomenon to...
Organochlorine insecticide residues in soils and soil invertebrates from agricultural lands
C.D. Gish
1970, Pesticides Monitoring Journal (3) 241-252
Soils and earthworms and other soil invertebrates were collected from 67 agricultural fields in eight States. Samples were analyzed by gas chromatography for DDE, DDD, DDT, aldrin, dieldrin, endrin, heptachlor, heptachlor epoxide, and gamma-chlordane insecticides. Organochlorine insecticides in soils averaged 1.5 ppm, dry weight, and in earthworms, 13.8...
Molt and taxonomy of red-breasted nuthatches
R.C. Banks
1970, The Wilson Bulletin (82) 201-205
The postnuptial and postjuvenal molts of Red-breasted Nuthatches occur from middle June to late September. Some birds may be nearly finished with the complete molt before other individuals begin, so that specimens taken at any given time may differ by as much as two months in the age of their...
Oological data on egg and breeding characteristics of brown pelicans
D. W. Anderson, J.J. Hickey
1970, The Wilson Bulletin (82) 14-28
Mean clutch size in 236 sets of North American Brown Pelican eggs was 2.95 and did not vary geographically between North American populations. Shell weight varied from 8.05 g to 10.99 g along a geographic continuum. Shell thickness averaged 0.510 mm for P&cams occidentalis occidentalis, 0.5544557 mm for P. IJ....
Surfactants as blackbird stressing agents
P.W. Lefebvre, J.L. Seubert
1970, Proceedings of the Vertebrate Pest Conference (4) 156-161
Applications of wetting-agent solutions produce mortality in birds. The exact cause of death is undetermined but it is believed that destruction of the insulating qualities of the plumage permits ambient cold temperatures and evaporation to lower the body temperature to a lethal level. The original concept of using these materials...
Organochlorine and heavy metal residues in bald eagle eggs
W.C. Krantz, B.M. Mulhern, George E. Bagley, A. Sprunt IV, F.J. Ligas, W.B. Robertson Jr.
1970, Pesticides Monitoring Journal (4) 136-140
Bald eagle eggs collected in 1968 from nests in Wisconsin, Maine, and Florida all contained residues of DDE, DDD, dieldrin, heptachlor epoxide, and polychlorinated biphenyls. Many also contained traces of DDT. Eggs from five nonproductive nests sampled in Maine contained much higher residues than did eggs collected from...
Two species of Simuliidae (Diptera), Cnephia ornithophilia and Prosimulium vernale, from Maryland
I.B. Tarshis, J.N. Stuht
1970, Annals of the Entomological Society of America (63) 587-590
The finding of Cnephia ornithophilia Davies, Peterson, & Wood and Prosimulium vernale Shewell for the first time at the Patuxent Wildlife Research Center, Laurel, Maryland, is described. Larvae of C. ornithophilia were collected Nov. 15, pupae Feb. 14, and adult flies Feb. 28. No immature or adult specimens were found between Apr. 2 and Nov. 14....