The American Midland Naturalist

Articles from Vol. 165, No. 2, April

Accuracy of Estimating Wolf Summer Territories by Daytime Locations
ABSTRACT. -We used locations of 6 wolves (Canis lupus) in Minnesota from Global Positioning System (GPS) collars to compare day-versus-night locations to estimate territory size and location during summer. We employed both minimum convex polygon (MCP)...
Assessing Fine-Scale Genotypic Structure of a Dominant Species in Native Grasslands
ABSTRACT.-Genotypic diversity of dominant species has been shown to have important consequences for community and ecosystem processes at a fine spatial scale. We examined the fine-scale (i.e., plant neighborhood scale, <1 m^sup 2^) genotypic structure...
Breeding Biology of the Threadstalk Milkvetch, Astragalus Filipes (Fabaceae), with a Review of the Genus
ABSTRACT. -Astragalus L. (Fabaceae) is an enormous and diverse plant genus with a cosmopolitan distribution, but relatively few breeding biologies are known for its member species. Threadstalk (or basalt) milkvetch, Astragalus filipes Torrey ex. A. Gray,...
Comparison of Morphological versus Molecular Characters for Discriminating between Sympatric Meadow and Prairie Voles
ABSTRACT.-Prairie (Microtus ochrogaster) and meadow (M. pennsylvanicus) voles are morphologically very similar species of rodents that are often found sympatrically. To assess the reliability of morphological characters typically used to differentiate...
Considering Local Adaptation in Issues of Lepidopteran Conservation-A Review and Recommendations
ABSTRACT.-Butterflies are among the most charismatic and alluring of invertebrate organisms. Their complex life histories and diverse habitat affiliations often produce regional variation and local adaptation among different populations. Unfortunately,...
Dental Anomalies in the Eastern Mole (Scalopus Aquaticus)
ABSTRACT.-We found dental anomalies in 36 of 249 (14.5%) cleaned skulls of eastern moles from southern Illinois and Cincinnati, Ohio. Additional teeth (supernumeration) were observed in four individuals; one specimen had a unilateral additional upper...
Distribution of Lake Sturgeon in New York: 11 Years of Restoration Management
ABSTRACT.-Lake sturgeon (Acipenser fulvescens) are native within the Lake Ontario drainage basin and listed as threatened by New York State. In 1995 the New York State Department of Environmental Conservation (NYSDEC) initiated restoration management...
Early Life History and Distribution of Pistolgrip (Tritogonia Verrucosa (Rafinesque, 1820)) in Minnesota and Wisconsin
ABSTRACT.-We conducted a series of studies to improve our understanding of pistolgrip life history and distribution in Minnesota and Wisconsin. In the St. Croix River, where this species is relatively abundant, we studied animals biweekly from May-Nov....
Female White-Tailed Deer Survival across Ecoregions in Minnesota and South Dakota
ABSTRACT.-Survival and cause-specific mortality of female white-tailed deer (Odocoileus virginianus) have been well documented in forested and agricultural landscapes, but limited information has been collected in grassland habitats typical of the Northern...
Habitat Selection and Dispersal of the Cobblestone Tiger Beetle (Cicindela Marginipennis Dejean) along the Genesee River, New York
ABSTRACT.-The goal of this study was to determine ecological, behavioral and environmental factors that would facilitate a management plan for the rare cobblestone tiger beetle (Cicindela marginipennis). We used a mark - recapture study to document dispersal...
In Memoriam: Dr. William Eugene Evans
Oct. 11, 1930-Oct. 12, 2010Last year, many of us lost a valued mentor, a delightful colleague, and a dear friend with the death of William Eugene Evans or "Dr. Bill," the moniker used by many of his students. For my own part, all of my emails to him...
Land Use, Stream Habitat and Benthic Invertebrate Assemblages in a Highly Altered Iowa Watershed
ABSTRACT.-Knowledge of relationships between land cover (i.e., land use) and abiotic and biotic features of headwater streams enhances our ability to predict and effectively assess conditions in a variety of aquatic ecosystems. We evaluated land use...
Lodgepole Pine Seed Germination Following Tree Death from Mountain Pine Beetle Attack in Colorado, USA
ABSTRACT. -Cones of lodgepole pine (Pinus contorta var. latifolia) are often serotinous, releasing their seeds from closed cones under heat from fire. Stand-replacing fires in predominantly serotinous stands can thus be expected to result in a strong...
Ruffed Grouse Selection of Drumming Sites in the Black Hills National Forest
ABSTRACT.-Ruffed grouse (Bonasa umbellus) are important game birds that depend on multiple forest age-classes of aspen (Populus spp.) for food and cover, which makes them an appropriate management indicator species for the condition of quaking aspen...
Seasonal Diet Composition of Adult Shovelnose Sturgeon in the Middle Mississippi River
ABSTRACT. -Because the shovelnose sturgeon (Scaphirhynchus platorynchus) population in the Middle Mississippi River (MMR) between Cairo, IL and St. Louis, MO (RKM 0-320) appears to be declining, we must understand dietary needs to help assess its conservation...
Sex-Biased Predation on Newts of the Genus Taricha by a Novel Predator and Its Relationship with Tetrodotoxin Toxicity
ABSTRACT.-Newts of the genus Taricha have long been studied in regards to their skin toxin, tetrodotoxin (TTX). It has been shown that the TTX levels across populations of Taricha are highly variable, and this has been mostly attributed to the interaction...
Short-Term Effects of Burning and Disking on Songbird Use of Floodplain Conservation Easements
ABSTRACT.-Extensive conversion of Midwestern riparian areas for agricultural production has had many consequences including reduced habitat for nesting birds. However, more than 120,000 ha of riparian habitat have been restored in this region through...
Surveys of Arkansas Dung Beetles (Coleoptera: Scarabaeidae and Geotrupidae): Phenologies, Mass Occurrences, State and Distributional Records
ABSTRACT.-We present the results of an 18 mo survey of the seasonal activity and species composition of dung beetles (Scarabaeidae: Scarabaeinae and Aphodiinae and Geotrupidae: Geotrupes) from a cattle pasture on Crowley's Ridge, Arkansas, and of 17...
The Effects of Climate Modes on Growing-Season Length and Timing of Reproduction in the Pacific Nordwest as Revealed by Biophysical Modeling of Lizards
ABSTRACT.-The effects of climate change on environments are increasingly obvious and are leading to stronger and more varied biological responses as organisms compensate. To understand better the responses of terrestrial ectotherms to climate oscillations...
Woody Invasions of Urban Trails and the Changing Face of Urban Forests in the Great Plains, USA
ABSTRACT.-Corridors such as roads and trails can facilitate invasions by non-native plant species. The open, disturbed habitat associated with corridors provides favorable growing conditions for many non-native plant species. Bike trails are a corridor...