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Page 4277, results 106901 - 106925

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Dispersal of wolves (Canis lupus) in northeastern Minnesota, 1969-1989
E.M. Gese, L.D. Mech
1991, Canadian Journal of Zoology (69) 2946-2955
We examined the dispersal patterns of radio-collared wolves (Canis lupus) from 21 packs in the Superior National Forest, Minnesota, from 1969 to 1989. A total of 316 wolves (542 wolf-years) were captured, radio-collared, and followed during 21 years of radio-tracking; 75 were identified as dispersers. Both sexes dispersed...
Toxicity of trimethyltin and triethyltin to mallard ducklings
W. James Fleming, E. F. Hill, J.J. Momot, V.F. Pang
1991, Environmental Toxicology and Chemistry (10) 255-260
Trimethyltin chloride (TMTC) and triethyltin chloride (TETC) were fed to mallard (Anas platyrhynchos) ducklings for 73 to 75 d, beginning when ducklings were 3 to 4 d old. Diets were mixed to contain 0, 0.5, 5 or 50 ppm Sn as either TMTC or TETC. Mortality occurred only in the...
Contaminants in American alligator eggs from Lake Apopka, Lake Griffin, and Lake Okeechobee, Florida
Gary H. Heinz, H. Franklin Percival, Michael L. Jennings
1991, Environmental Monitoring and Assessment (16) 277-285
Residues of organochlorine pesticides, polychlorinated biphenyls (PCBs), and 16 elements were measured in American alligator (Alligator mississippiensis) eggs collected in 1984 from Lakes Apopka, Griffin, and Okeechobee in central and south Florida. Organochlorine pesticides were highest in eggs from Lake Apopka. None of the elements appeared to be...
Population dynamics of American dog ticks (Acari: Ixodidae) along park trails
J. F. Carroll, E. Russek-Cohen, J.D. Nichols, J.E. Hines
1991, Environmental Entomology (20) 922-929
We conducted a mark–recapture study in which drag-collected ticks were removed from some park trails weekly from April to July. Weekly survival rates (probability of surviving and remaining on the trails) were significantly lower on trails used heavily by hikers, horses, and pets than on trails used less frequently. Although...
Trends in North American small mammals found in common barn-owl (Tyto alba) dietary studies
D. R. Clark Jr., C.M. Bunck
1991, Canadian Journal of Zoology (69) 3093-3102
Data on mammals were compiled from published studies of common barn-owl (Tyto alba) pellets. Mammalian composition of pellet samples was analyzed within geographic regions in regard to year, mean annual precipitation, latitude, and number of individual mammals in the sample. Percentages of individuals in pellets that were shrews...
Multifragment alleles in DNA fingerprints of the parrot, Amazona ventralis
M.K. Brock, B.N. White
1991, Journal of Heredity (82) 209-212
Human DNA probes that identify variable numbers of tandem repeat loci are being used to generate DNA fingerprints in many animal and plant species. In most species the majority of the sc rable autoradiographic bands of the DNA fingerprint represent alleles from numerous unlinked loci. This study was initiated to...
Raptor responses to low-level jet aircraft and sonic booms
David H. Ellis, Catherine H. Ellis, David P. Mindell
1991, Environmental Pollution (74) 53-83
We estimated effects of low-level military jet aircraft and mid- to high-altitude sonic booms (actual and simulated) on nesting peregrine falcons (Falco peregrinus) and seven other raptors by observing their responses to test stimuli, determining nesting success for the test year, and evaluating site reoccupancy rates for the year following...
Approaches to the conservation of coastal wetlands in the Western Hemisphere
K.L. Bildstein, G.T. Bancroft, P.J. Dugan, D.H. Gordon, R.M. Erwin, E. Nol, L.X. Payne, Stanley E. Senner
1991, The Wilson Bulletin (103) 218-254
Coastal wetlands rank among the most productive and ecologically valuable natural ecosystems on Earth. Unfortunately, they are also some of the most disturbed. Because they are productive and can serve as transportation arteries, coastal wetlands have long attracted human settlement. More than half of the U.S. population currently lives within...
Gray wolf density and its association with weights and hematology of pups from 1970 to 1988
Glenn D. DelGiudice, L. David Mech, U.S. Seal
1991, Journal of Wildlife Diseases (27) 630-636
We examined weights and hematologic profiles of gray wolf (Canis lupus) pups and the associated wolf density in the east-central Superior National Forest of northeastern Minnesota (USA) during 1970 to 1988. We collected weight and hematologic data from 117 pups (57 females, 60 males) during 1 September to 22 November...
Green coloration of recently laid black-crowned night-heron eggs
T. W. Custer
1991, Colonial Waterbirds (14) 184-185
Color of Black-crowned Night-Heron (Nycticorax nycticorax) eggs of known laying order was quantified in a Wisconsin (USA) colony. Eggs were of greener intensity on the day of laying and one day thereafter than earlier laid eggs within a clutch. Egg color can be used to identify clutches within...
Bats, cyanide, and gold mining
Donald R. Clark Jr.
1991, BATS Magazine (9) 17-18
Although the boom days of prospectors and gold nuggets are long gone, modern technology enables gold to continue to be extracted from ore. Unfortunately, the extraction method has often been disastrous for bats and other wildlife, an issue I first became aware of in early 1989. Phone calls from Drs....
The characterization of axenic culture systems suitable for plant propagation and experimental studies of the submersed aquatic angiosperm Potamogeton pectinatus (Sago pondweed)
M.S. Ailstock, W. James Fleming, T.J. Cooke
1991, Estuaries (14) 57-64
Clonal lines of the submersed aquatic angiospermPotamogeton pectinatus were grown in three culture systems. The first, which used sucrose as a carbon source in a liquid medium, supported vigorous vegetative growth and can be used to propagate large numbers of plants in axenic conditions. In this culture system, plants were responsive...
Effects of submersed macrophytes on dissolved oxygen, pH and temperature under different conditions of wind, tide and bed structure
V. Carter, N. B. Rybicki, R.S. Hammerschlag
1991, Journal of Freshwater Ecology (6) 121-133
Seasonal data on diurnal dissolved-oxygen concentration (DO), pH, temperature and chlorophyll-a were collected and species composition and vertical structure of macrophyte beds were analyzed in the tidal Potomac River during the 1987 growing season. The relationships among these variables and physical and climatic factors were analyzed. Elevated surface temperatures, DO...
Specimens and probable breeding activity of the band-rumped storm-petrel on Hawaii
W.E. Banko, P.C. Banko, R.E. David
1991, The Wilson Bulletin (103) 650-655
Specimens (a downy fledgling and a hatch-year juvenile) and nocturnal calling of the Band-rumped Storm-Petrel (Oceanodroma custro) are evidence that this rare seabird breeds on the island of Hawaii. Nocturnal calling over land and sightings near the coast indicate that populations nest on the southwest rift and possibly the upper...