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- Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications (2)
- USDA Wildlife Services: Staff Publications (2)
- United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications (2)
- United States Geological Survey: Staff Publications (1)
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Invasive Predators: A Synthesis Of The Past, Present, And Future, William C. Pitt, Gary W. Witmer
Invasive Predators: A Synthesis Of The Past, Present, And Future, William C. Pitt, Gary W. Witmer
USDA Wildlife Services: Staff Publications
Invasive predators have had devastating effects on species around the world and their effects are increasing. Successful invasive predators typically have a high reproductive rate, short generation times, a generalized diet, and are small or secretive. However, the probability of a successful invasion is also dependent on the qualities of the ecosystem invaded. Ecosystems with a limited assemblage of native species are the most susceptible to invasion provided that habitat and climate are favorable. In addition, the number of invasion opportunities for a species increases the likelihood that the species will successfully establish. The list of routes of entry or …
Laboratory Evaluation Of Avian Odors For Mosquito (Diptera: Culicidae) Attraction, S. A. Allan, Ulrich R. Bernier, D. L. Kline
Laboratory Evaluation Of Avian Odors For Mosquito (Diptera: Culicidae) Attraction, S. A. Allan, Ulrich R. Bernier, D. L. Kline
United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications
Attraction of Culex quinquefasciatus Say, Culex tarsalis Coquillett, Culex nigripalpus Theobald, and Aedes aegypti (L.) to avian and other host odors was investigated in a dual-port olfactometer. Although attraction to a human arm was high for Ae. aegypti (>80%) and low for all Culex spp. (<25%), all species responded similarly to a chicken (55.3-73.6%). Responses of Ae. aegypti, Cx. quinquefasciatus, and Cx. nigripalpus to feathers were low (<20%) but greater than to controls. There was no difference in attraction of Cx. tarsalis to feathers or controls. Responses to CO2 (5 ml/min) were low for all species (<15%) except Cx. tarsalis, which were moderate (24.5%). When feathers were combined with CO2, the resulting attraction was additive or lower than responses …
Movements Of House Sparrows Captured At An Experimental Grain Station In Fargo, North Dakota, Lisa M. Montplaisir, George M. Linz, Debra Tomanek, Linda B. Penry, David L. Bergman, H. Jeffrey Homan
Movements Of House Sparrows Captured At An Experimental Grain Station In Fargo, North Dakota, Lisa M. Montplaisir, George M. Linz, Debra Tomanek, Linda B. Penry, David L. Bergman, H. Jeffrey Homan
United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications
From 2 August through 1 October 1993 we banded and leg flagged 362 house sparrows (126 adults, 236 juveniles) captured in a decoy trap at an experimental grain station on the campus of North Dakota State University, Fargo (NDSU). We documented sightings of leg-flagged birds between 3 August 1993 and 14 December 1994. Over this period, 56 (66%) of the total 76 observations of leg-flagged birds were on the NDSU campus; 21 (28%) of the 76 observations occurred between March and December 1994, a minimum of 5 months after the leg flags were attached and following the 1993-1994 winter. Of …
Comparison Of Breeding Bird And Vegetation Communities In Primary And Secondary Forests Of Great Smoky Mountains National Park, Theodore R. Simons, Susan A. Shriner, George L. Farnsworth
Comparison Of Breeding Bird And Vegetation Communities In Primary And Secondary Forests Of Great Smoky Mountains National Park, Theodore R. Simons, Susan A. Shriner, George L. Farnsworth
United States Geological Survey: Staff Publications
We compared breeding bird communities and vegetation characteristics at paired point locations in primary (undisturbed) and mature secondary forest (70–100 years old) sites in Great Smoky Mountains National Park, USA to understand how sites logged prior to creation of the park compare to undisturbed sites following 70 years of protection from human disturbance. We found that bird and vegetation communities are currently similar, but retain some differences in species composition. Rank abundance curves for primary and secondary forest bird communities showed very similar patterns of species dominance. Species composition was also similar on the two sites which shared 24 of …
Life-History And Ecological Correlates Of Geographic Variation In Egg And Clutch Mass Among Passerine Species, Thomas E. Martin, R. D. Bassar, S. K. Bassar, J. J. Fontaine, P. Lloyd, H. A. Mathewson, A. M. Niklison, A. Chalfoun
Life-History And Ecological Correlates Of Geographic Variation In Egg And Clutch Mass Among Passerine Species, Thomas E. Martin, R. D. Bassar, S. K. Bassar, J. J. Fontaine, P. Lloyd, H. A. Mathewson, A. M. Niklison, A. Chalfoun
Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications
Broad geographic patterns in egg and clutch mass are poorly described, and potential causes of variation remain largely unexamined. We describe interspecific variation in avian egg and clutch mass within and among diverse geographic regions and explore hypotheses related to allometry, clutch size, nest predation, adult mortality, and parental care as correlates and possible explanations of variation. We studied 74 species of Passeriformes at four latitudes on three continents: the north temperate United States, tropical Venezuela, subtropical Argentina, and south temperate South Africa. Egg and clutch mass increased with adult body mass in all locations, but differed among locations for …
Multimodel Inference And The Understanding Of Complexity, Discontinuity, And Normadism, Craig R. Allen, Denis A. Saunders
Multimodel Inference And The Understanding Of Complexity, Discontinuity, And Normadism, Craig R. Allen, Denis A. Saunders
Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications
Nomadism has received surprisingly little attention in the ecological literature, and further work in this area is needed. The results of Woinarski’s reanalysis of our research findings are broadly similar to our own, and they support our original interpretation. However, his presentation is confusing and difficult to interpret.We used an information-theoretic approach to multimodel selection. We a priori defined plausible candidate models relating the variables described in our original paper or Woinarski’s reanalysis to the phenomenon of nomadism. We tested models that investigate nomadism as a function of nectivory, granivory, diet diversity, mixed diet, distance to body mass aggregation edge, …
Evaluation Of Bird Response To Propane Exploders In An Airport Environment, Brian E. Washburn, Richard B. Chipman, Laura C. Francoeur
Evaluation Of Bird Response To Propane Exploders In An Airport Environment, Brian E. Washburn, Richard B. Chipman, Laura C. Francoeur
USDA Wildlife Services: Staff Publications
Bird-aircraft collisions (bird-strikes) cause serious safety hazards to aircraft, costing civilian aviation at least $496 million annually in the U.S. Non-lethal bird-frightening devices, such as propane exploders, are commonly used to deter birds from airport environments. We conducted a study during August - October 2004 to determine the efficacy of propane exploders utilized with and without concurrent lethal reinforcement activities for altering bird behavior at John F. Kennedy International Airport in Queens, New York. Two groups of 8 propane exploders each were deployed on the airfield. One group of propane exploders was set to “off” (control), whereas the other group …