The American Midland Naturalist back issues from July 2007:
Assessing Causes of Change in the Freshwater Mussels (Bivalvia: Unionidae) in the Black River, Ohio
Jul 01, 2007; ... ABSTRACT. - Habitat destruction is believed to be the number one cause of the decline in unionid mussels. Around the world, cities, towns and agriculture alter the structure of watersheds, and the Black River in Ohio may be a typical example. We investigated the diversity and abundance ...
Reproductive Allometry in the Common Map Turtle, Graptemys geographica
Jul 01, 2007; ... Abstract.- According to optimal offspring size theory, natural selection pressures balance the egg size/clutch size trade-off at a point where increases in maternal body size result in increases in clutch size but not increases in egg size. However, many turtle species show increasing ...
Habitat Selection by Native Turtles in a Lake Erie Wetland, USA
Jul 01, 2007; ... Abstract.- We examined habitat selection by the painted turtle (Chrysemys picta marginata) and common map turtle (Graptemys geographica) in the Ottawa National Wildlife Refuge, Ohio, USA. Basking traps caught 198 (162 C. picta and 36 G. geographica) and 140 (106 C. picta, 33 G ....
The Effect of Group Size on the Responses of Wood Frog Tadpoles to Fish
Jul 01, 2007; ... ABSTRACT. - In many species of anurans, tadpoles adjust their behavior in the presence of fish or fish cues, in many cases reducing their activity. Tadpoles may also adjust their activity or behavior in response to group size. We examined the effects of predator cues (bluegill sunfish, ...
Spawning Chronology, Nest Site Selection and Nest Success of Smallmouth Bass During Benign Streamflow Conditions
Jul 01, 2007; ... ABSTRACT.- We documented the nesting chronology, nest site selection and nest success of smallmouth bass Micropterus dolomieu in an upstream (4th order) and downstream (5th order) reach of Baron Fork Creek, Oklahoma. Males started nesting in mid-Apr. when water temperatures increased to ...
Changes in a Northwestern Florida Gulf Coast Herpetofaunal Community Over a 28-y Period
Jul 01, 2007; ... ABSTRACT.- Population declines of amphibians and reptiles throughout the world have led to the initiation of projects to monitor their status and trends. Historical collections give an indication of which species occurred in an area at one time, although the ambiguity surrounding ...
Direct and Indirect Effects of Channel Catfish (Ictalurus punctatus) on Native Crayfishes (Cambaridae) in Experimental Tanks
Jul 01, 2007; ... Abstract. - For the incised, sand-bed streams of north-central Mississippi, USA, fish predation is one plausible mechanism to explain both relatively low crayfish densities and differences in stream size occupied by various native crayfishes. I conducted two mesocosm experiments to test ...
Detection Rates of Eastern Spotted Skunks (Spilogale putorius) in Missouri and Arkansas Using Live-capture and Non-invasive Techniques
Jul 01, 2007; ... ABSTRACT.- The eastern spotted skunk (Spilogale putorius) is a rare species of conservation concern throughout much of its range, but effective management is hampered by a lack of information on appropriate survey strategies. We validated three commonly used techniques to identify the ...
Effects of Landscape Composition and Structure on Core Use Areas of Raccoons (Procyon lotor) in a Prairie Landscape
Jul 01, 2007; ... ABSTRACT.- Raccoons are habitat generalists, existing in a variety of landscapes. Although known to inhabit prairie landscapes, few studies have examined habitat selection of raccoons within these environs and relationships between landscape structure and habitat selection are poorly ...
Elimia comalensis (Gastropoda: Pleuroceridae) from the Edwards Plateau, Texas: Multiple Unrecognized Endemics or Native Exotic?
Jul 01, 2007; ... ABSTRACT.- This research explored the distribution, morphological variation, and molecular systematics of Elimia comalensis (Gastropoda: Pleuroceridae) using geometric morphometrics (n = 565) and mitochondrial DNA sequences (n = 15). Elimia comalensis was originally documented as endemic ...
Spatial and Temporal Variation in the Diet of Coyotes in the Chicago Metropolitan Area
Jul 01, 2007; ... ABSTRACT.- Coyotes (Canis latrans) are an opportunistic predator that have adapted to many human-modified environments. Conflicts between coyotes and humans are an increasing concern for managers in urban areas. We examined the spatial and temporal utilization and availability of natural ...
Roost Characteristics of Hoary Bats in Arkansas
Jul 01, 2007; ... Abstract. - We radiotracked nine hoary bats (Lasiurus cinereus) and characterized 12 roosts during late spring and early summer in the Ouachita Mountains of central Arkansas. Hoary bats generally roosted on the easterly sides of tree canopies in the foliage of white oaks (Quercus alba), ...
Dietary Overlap of Swift Foxes and Coyotes in Northwestern Texas
Jul 01, 2007; ... Abstract.- Predation by coyotes (Canis latrans) has been documented as the main cause of mortality in most populations of swift foxes (Vulpes velox), although reasons for such high predation rates were often unclear. Additionally, coyotes kill but generally do not consume swift foxes, ...
Coyote Flight Movements Relative to Territory Boundaries: An Experiment in the Field
Jul 01, 2007; ... Abstract. - It is well-known that coyotes maintain exclusive territories in which they are least vulnerable to mortality from humans. Studies also indicate that resident (i.e., nondispersing) coyotes rarely leave these secure areas when unperturbed. Here, we investigated whether coyotes ...
Seed Banks in Diked and Undiked Great Lakes Coastal Wetlands
Jul 01, 2007; ... Abstract.- Many Great Lakes coastal wetlands have been impounded (diked) to provide protection from flooding and to manipulate water levels for vegetation management. Dikes change the hydrological regime by isolating the coastal wetland from natural lake processes. We evaluated the seed ...
Shoaling Behavior in the Central Mudminnow (Umbra limi)
Jul 01, 2007; ... ABSTRACT.- The central mudminnow (Umbra limi Kirtland, 1841) is a small freshwater fish that inhabits slow-moving waters in central North America. In this study, we investigate shoaling behavior in the central mudminnow. In Experiment 1, a focal mudminnow was given the simultaneous ...
Northerly Range Extensions of Mammalian Species in Minnesota
Jul 01, 2007; ... ABSTRACT. - An inventory and monitoring program for species of non-volant small mammals was undertaken in Voyageurs National Park on the Minnesota-Canadian border. Other observations of mammals were made in and around the Park (1967-2004). Here we report species range extensions, most ...
Female Olympic Marmots (Marmota olympus) Reproduce in Consecutive Years
Jul 01, 2007; ... ABSTRACT.- Olympic marmots (Marmota olympus) are reported to skip at least one year between reproductive efforts. We observed several female marmots weaning infants in consecutive years. There was no evidence that reproductive skipping was more common than annual reproduction. High ...
Effects of Method of English Ivy Removal and Seed Addition on Regeneration of Vegetation in a Southeastern Piedmont Forest
Jul 01, 2007; ... Abstract.- Invasive plants can have substantial negative impacts on native flora and fauna. As a result, ecological restoration often involves removal of invasive species. We examined the effects of the removal of Hedera helix (English ivy) on regeneration of native vegetation in the ...
Experimental Lead Pellet Ingestion In Mourning Doves (Zenaida macroura)
Jul 01, 2007; ... Abstract. - Because the relationship between lead pellet availability and ingestion by mourning doves (Zenaida macroura) remains uncertain, we conducted an experiment to determine if doves held in captivity freely ingest lead shotgun pellets, investigate the relationship between pellet ...
Aldo Leopold's Odyssey
Jul 01, 2007; ... Aldo Leopold's Odyssey, Newton, Julia, L., Island Press, 2006, Washington, Covelo London ISBN 1-59726-045-2 I discovered A Sand County Almanac as an undergraduate trying to select a major. Aldo Leopold's elegant prose and vivid imagery captivated me. Leopold's persuasive arguments for ...
Conservation Genetic Assessment of the Blue-spotted Salamander in Iowa
Jul 01, 2007; ... Abstract.- Blue-spotted salamanders (Ambystoma laterale) are a widespread and relatively common species throughout northeastern North America. The distribution of this species is marked by a pair of peripherally isolated populations at the southwestern boundary of its range in Iowa, a ...