Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16785
DDE and organochlorines in eggs of black-crowned night-herons nesting in Colorado and Wyoming
No abstract available.
Authors
L. C. McEwen
Impacts of forest herbicides on wildlife: Toxicity and habitat alteration
This paper begins with a review of both laboratory and field studies on tbe possible direct toxic effects of herbicides on terrestrial vertebrates, primarily birds and mammals. Alteration of the palatability of forage and changes in reproductive success are also discussed. Emphasis is placed on the use of herbicides in forestry; studies dealing with agricultural systems are referenced where appr
Authors
M.L. Morrison, E.C. Meslow
An eight-year demography of a Minnesota wolf pack
No abstract available.
Authors
L. D. Mech, H.H. Hertel
Nest site characteristics of three coexisting Accipiter hawks in northeastern Oregon
Habitat data were evaluated at 34 Goshawk (Accipiter gentilis), 31 Cooper's Hawk (A. cooperii), and 15 Sharp-shinned Hawk (A. striatus) nest sites in coniferous forests of northeastern Oregon. Crown volume profiles indicate a strong similarity in vegetative structure at nest sites of cooperii and striatus; both commonly nest in younger successional stands than gentilis. Habitat separation of nes
Authors
K.R. Moore, C. J. Henny
Estimating taxonomic diversity, extinction rates, and speciation rates from fossil data using capture-recapture models
Capture-recapture models can be used to estimate parameters of interest from paleobiological data when encouter probabilities are unknown and variable over time. These models also permit estimation of sampling variances and goodness-of-fit tests are available for assessing the fit of data to most models. The authors describe capture-recapture models which should be useful in paleobiological anal
Authors
J. D. Nichols, K. H. Pollock
The relationship between harvest and survival rates of mallards: A straightforward approach with partitioned data sets
We randomly partitioned mallard (Anas platyrhynchos) bandings and recoveries from each of a number of selected reference areas into 2 groups and estimated survival and harvest rates for each area and group. This procedure produced independent vectors of survival- and harvest-rate estimates, which were used to test the general hypothesis that mallard survival and harvest rates were inversely relate
Authors
J. D. Nichols, J. E. Hines
Rationale and suggestions for a hemispheric color-marking scheme for shorebirds: A way to avoid chaos
No abstract available.
Authors
J.P. Myers, J.E. Maron, E. Ortiz, G. Castro, M.A. Howe, R. I. G. Morrison, B. A. Harrington
Toxicity of copper to Gastropoda with notes on the relation to the apple snail: A review
No abstract available.
Authors
M.J. Imlay, P. V. Winger
Longevity records of North American birds: Remizidae through Parulinae
No abstract available.
Authors
M. K. Klimkiewicz, R. B. Clapp, A.G. Futcher
Distribution of submersed aquatic macrophytes in the tidal Potomac River
Results of a 3-year survey (1978?1980) and review of historic trends have shown a major decline in the number of species and the distribution of submersed aquatic macrophytes in the tidal Potomac River since the early 1900's. The freshwater tidal river is essentially devoid of plants and only very sparse populations remain in the mesohaline section of the estuary. Present plant populations are lar
Authors
G. M. Haramis, V. Carter
Pack size and wolf pup survival: their relationship under varying ecological conditions
The relationship between pack size and two parameters of reproductive success (litter size at 7–8 months and pup weights at 5–6 months) were determined for two wolf (Canis lupus) populations in northern Minnesota. Pup weights were not correlated with pack size for either population. Litter size, however, was correlated with pack size, but the direction of the relationship varied between the two st
Authors
Fred H. Harrington, L. David Mech, Steven H. Fritts
Wolf pack spacing: Howling as a territory-independent spacing mechanism in a territorial population
Howling is a principle means of spacing in wolf populations. The relationship between a pack's responses to howling (replies, movements) and its location within its home range, was studied using human-simulated howling in a territorial population in northeastern Minnesota. The results indicated the responses were independent of the pack's location, or the locations of the pack and playback relat
Authors
F.H. Harrington, L. D. Mech