The American Midland Naturalist

Articles from Vol. 163, No. 2, April

A Late Pleistocene Bird Community at the Northern Edge of the Tropics in Sonora, Mexico
ABSTRACT.Recently collected fossils from the late Pleistocene (Rancholabrean North American Land Mammal Age) locality at Térapa, Sonora, México, represent 31 species of non-passerine birds. Twenty-three of the species (74%) are aquatic (grebes, pelican,...
Characteristics of Dominant and Subordinate Led Social Groups of White-Tailed Deer in Illinois
ABSTRACT.-This study of dominant and subordinate led social groups of white-tailed deer (Odocoileus virginianus) was designed to investigate longevity and associations among members as well as the reproductive success that determines the durability of...
Discovery of Ammocrypta Clara (Western Sand Darter) in the Upper Ohio River of West Virginia
ABSTRACT.-Ammocrypta clara Jordan and Meek (western sand darter) occurs primarily in the western portions of Mississippi River system, but also has been reported from a Lake Michigan drainage and a few eastern Texas Gulf Slope rivers. Additional range...
Effects of Bot Fly Parasitism on Movements of Peromyscus Leucopus
ABSTRACT.-Factors that affect movement of small mammals include vegetation structure, resource distribution, interspecific interactions and parasitism. The objective of this study was to assess the effect of bot fly ( Cuterebra fontinella) parasitism...
Effects of Time-since-Fire and Microhabitat on the Occurrence and Density of the Endemic Paronychia Chartacea Ssp. Chartacea in Florida Scrub and along Roadsides
ABSTRACT.-Conservation of an imperiled plant species requires an understanding of its local occurrence and density in relation to habitat variation. Paronychia chartacea ssp. chartacea is a federally threatened species restricted to gaps in fire-maintained...
Evaluating Relationships between Spatial Heterogeneity and the Biotic and Abiotic Environments
ABSTRACT.-While most studies of heterogeneity have focused on describing patterns of species or communities, few have focused on the relationships between biotic and abiotic environmental landscape-level gradients. Our study was designed to determine...
Excursive Behaviors by Female White-Tailed Deer during Estrus at Two Mid-Atlantic Sites
ABSTRACT.-Current research suggests that female white-tailed deer (Odocoileus virginianus) will adopt sedentary breeding strategies in populations with an abundance of males and a more active mate-searching strategy in low-density or unbalanced herds....
Interactions between Recently Metamorphosed Green Frogs and American Toads under Laboratory Conditions
ABSTRACT.-Many research studies have focused on the interactions among larval anurans, but relatively little is known about competitive or predatory interactions among anurans following metamorphosis. The purpose of our study was to examine the effects...
Life History and Demographics of the Endangered Birdwing Pearlymussel (Lemiox Rimosus) (Bivalvia: Unionidae)
ABSTRACT. -The life history and population demography of the endangered birdwing pearlymussel (Lemiox rimosus) were studied in the Clinch and Duck rivers, Tennessee. Reproducing populations of L. rimosus now occur only in the Clinch, Duck and Powell...
Magnitudinal Asymmetries in Seed Production in Vaccinium Corymbosum: Anomaly or Not?
ABSTRACT.-Analyses of the annual seed set taken from 208 shrubs of Vaccinium corymbosum at six locations in eastern North American from 1978 to 1999, showed that at each location, a group of individual plants retained the same rank among the others in...
Maternal Response to Conspecific Visits at Natal Dens in Raccoons (Procyon Lotor)
ABSTRACT.The response of postparturient females to conspecifics at the natal den can provide insights into intraspecific dynamics, particularly the risk of infanticide. In solitary species, the risk of infanticide may be high and mothers are expected...
Persistence and Stability of the Component Helminth Community of the Foothill Yellow-Legged Frog, Rana Boylii (Ranidae), from Humboldt County, California, 1964-1965, versus 2004-2007
ABSTRACT.Persistence and stability of the component helminth community of Rana boylii from Humboldt County, California was evaluated using two collections made 40 y apart (1964-1965 and 2004-2007). The component helminth community consisted of 13 species:...
Ratsnakes and Brush Piles: Intended and Unintended Consequences of Improving Habitat for Wildlife?
ABSTRACT.-Brush pile creation is a common habitat management method used to attract wildlife. However, there is a paucity of data regarding effectiveness of brush pile creation and the indirect effects of brush piles on multi-species interactions. Here...
Re-Examining the Importance of Fish in the Diets of Stream-Dwelling Crayfishes: Implications for Food Web Analyses and Conservation
ABSTRACT.-We examined the diets of two species of stream-dwelling North American crayfishes (Orconectes propinquus and O. rusticus) at eight sites in the Midwestern United States both by measuring natural abundances of stable isotopes of carbon and nitrogen...
Reproductive Timing of the Telescope Shiner, Notropis Telescopus, in Alabama, USA
ABSTRACT.-Gonadal condition of the cyprinid stream fish Notropis telescopus (telescope shiner) was monitored from Feb. to Sep. to determine reproductive schedule. The study site was at the southern limit of species range in northeastern Alabama. Notropis...
Spatial Distributions of Mule Deer and North American Elk: Resource Partitioning in a Sage-Steppe Environment
ABSTRACT. -We examined spatial distributions and resource partitioning among female mule deer (Odocoileus hemionus) and female North American elk (Cervus elaphus) during summer and winter in southeastern Idaho, USA. Our objective was to understand differences...
Spatial Ecology, Survival and Cause-Specific Mortality of Gray Foxes (Urocyon Cinereoargenteus) in a Longleaf Pine Ecosystem
ABSTRACT.-Gray fox ecology is poorly understood within the longleaf pine ecosystem, despite the importance of these landscapes to conservation and biological diversity. During 2002-2006, we radio-monitored 42 gray foxes and estimated space use, habitat...
Temporal Variation in Terrestrial Invertebrate Consumption by Laughing Gulls in New York
ABSTRACT.Laughing gulls (Larus atricilla) are commonly found in many areas of North America and little is known about their diet, particularly in coastal-urban interfaces where gull-aircraft collisions can be a serious concern. The objective of this...
The Effect of Experience on Male Courtship and Mating Behaviors in a Cellar Spider
ABSTRACT.Experience effects on mating have been implicated as important factors that can account for some of the variability in responses by prospective mates. Previous studies have demonstrated that sexual experience and learning can play significant...
Two New Geographic Distribution Records for the Brook Stickleback, Culaea Inconstans (Gastrosteiformes: Gastrosteidae), in Northwestern Nebraska
ABSTRACT.-We report two new geographic distribution records for the Brook Stickleback (Culaea inconstans) in Nebraska. Both records are from Dawes County, the first from Dead Man's Creek and the other from Chadron Creek. These are the only records of...