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184904 results.

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Page 5520, results 137976 - 138000

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Sleeping distance in wild wolf packs
S.T. Knick, L.D. Mech
1980, Behavioral and Neural Biology (28) 507-511
Sleeping distances were observed among members of 13 wild wolf (Canis lupus) packs and 11 pairs in northeastern Minnesota to determine if the distances correlated with pack size and composition. The study utilized aerial radio-tracking and observation during winter. Pack size and number of adults per pack were...
Atlantic brant--human commensalism on eelgrass beds in New Jersey
R.E. Kirby, H.H. Obrecht III
1980, Wildfowl (31) 158-160
Atlantic Brant Branta bernicla hrota in Barnegat Bay, New Jersey, have established a commensal feeding relationship with man. Small flocks feed 3-5 m from clam fishermen on Zostera torn from the sea bottom by the fishing activities. Background material on the availability and digestibility of different brant foods is presented....
Masked mustelid
C. N. Hillman, J. W. Carpenter
1980, Nature Conservancy News (30) 20-23
Aroclor 1242 and reproductive success of adult mallards (Anas platyrhynchos)
S. D. Haseltine, R. M. Prouty
1980, Environmental Research (23) 29-34
Twenty-four pairs of adult mallards were fed a diet containing 0 or 150 ppm of the PCB Aroclor 1242 for 12 weeks during which egg laying was induced. Laying started in both groups an average of 33 days after PCB treatment began. All hens were allowed to lay...
Canine tooth wear in captive little brown bats
Donald R. Clark Jr.
1980, Acta Theriologica (25) 270-273
Upper canine teeth of little brown bats Myotis lucifugus lucifugus held in stainless steel wire mesh cages underwent severe wear which exceeded that observed previously in caged big brown bats, Eptesicus fuscus fuscus. This suggests a relationship between amount of wear and size of the caged bats with damage increasing...
Organochlorine residues in eggs of loggerhead and green sea turtles nesting at Merritt Island, Florida--July and August, 1976
D. R. Clark Jr., A. J. Krynitsky
1980, Pesticides Monitoring Journal (14) 7-10
Eggs from nine clutches of loggerhead turtles (Caretta caretta) and two clutches of green turtles (Chelonia mydas) were collected as they were laid on Merritt Island, Florida. Eggs were incubated, frozen, and analyzed for organochlorines. Levels of DDE and PCB, the major contaminants, averaged less than 0.08 ppm in loggerhead...
The influence of hunger on meal to pellet intervals in barred owls
G.E. Duke, M.R. Fuller, B.J. Huberty
1980, Comparative Biochemistry and Physiology, Part A: Physiology (66) 203-207
1. Barred owls fed at a sub-maintenance (SM) level had significantly (P < 0.01) longer meal to pellet intervals (MPI)/g eaten/kg body weight (BW) than those fed at an above maintenance (AM) level; MPI/g per kg for owls fed at a maintenance (M) level was intermediate but significantly (P <...
Intestinal absorption of 5 chromium compounds in young black ducks (Anas rubripes)
W. C. Eastin Jr., S. D. Haseltine, H. C. Murray
1980, Toxicology Letters (6) 193-197
An in vivo intestinal perfusion technique was used to measure the absorption rates of five Cr compounds in black ducks. Cr was absorbed from saline solutions of KCr(SO4)2 and CrO3 at a rate about 1.5 to 2.0 times greater than from solutions of Cr, Cr(NO3)3, and Cr(C5H7O2)3. These results suggest the ionic...
Situation report: Heavy DDT contamination at Wheeler National Wildlife Refuge
W. James Fleming, T.Z. Atkeson
1980, Proceedings of the Annual Conference of the Southeastern Association of Fish and Wildlife Agencies (34) 453-461
A DDT manufacturing plant that operated on the Redstone Arsenal near Huntsville, Alabama discharged DDT-Iaden effluent from 1947 to 1970 into a creek on Wheeler National Wildlife Refuge. Seven to 9 years after the plant closed, high DDT, DDE, and DDD levels were reported in soils, river sediments, and fish...
Reproduction and residue accumulation in black ducks fed toxaphene
S. D. Haseltine, M. T. Finley, E. Cromartie
1980, Archives of Environmental Contamination and Toxicology (9) 461-471
Three sets of 15 pairs of black ducks (Anas rubripes) were given 0, 10, or 50 ppm toxaphene in a dry mash diet for a period of 19 months, which included two breeding seasons. Survival of adults was not affected, but the weights of treated males were depressed during the...
Quantification of petroleum-type hydrocarbons in avian tissue
M. L. Gay, A. A. Belisle, J.F. Patton
1980, Journal of Chromatography A (187) 153-160
Methods were developed for the analysis of 16 hydrocarbons in avian tissue. Mechanical extraction with pentane was followed by clean-up on Florisil and Silicar. Residues were determined by gas—liquid chromatography and gas—liquid, chromatography—mass spectrometry. The method was applied to the analysis of liver, kidney, fat, and brain tissue of mallard...
Toxic effects of endrin and toxaphene on the southern leopard frog Rana sphenocephala
R.J. Hall, D. Swineford
1980, Environmental Pollution (Series A) (23) 53-65
Eggs, larvae and sub-adults of the southern leopard frog Rana sphenocephala were exposed to endrin and toxaphene. Exposure was in water by a continuous-flow technique, following standards that have been used successfully in the study of fish and invertebrates. R. sphenocephala is more sensitive to both pesticides than are higher vertebrates but is slightly...