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Articles 1 - 30 of 187
Full-Text Articles in Life Sciences
Coyote Occupancy And Movement In Hanover County, Virginia, Richard S. Groover
Coyote Occupancy And Movement In Hanover County, Virginia, Richard S. Groover
Virginia Journal of Science
Although the coyote (Canis latrans) is native to North America, we have limited understanding of its presence in Virginia. Coyote range expansion is linked to anthropogenic factors, including habitat fragmentation and the extirpation of apex predators. Information on coyote adaptations to Virginia habitats is scarce, and eastern coyotes may have unique adaptations for colonizing an area. Anecdotal evidence suggests that coyotes are abundant in Hanover County (north of Richmond, VA), but this has not been confirmed. This study was conducted over an 18-month period with multiple survey sites throughout Hanover County, each equipped with game camera stations and …
Wetlands In Our Backyard: A Review Of Wetland Types In Virginia State Parks, Kirsten Bauer, Benjamin K. Campbell
Wetlands In Our Backyard: A Review Of Wetland Types In Virginia State Parks, Kirsten Bauer, Benjamin K. Campbell
Virginia Journal of Science
Wetlands constitute a significant component of Virginia’s natural resources and heritage. Though historically they have been discounted—and often denigrated—the exceptional value of wetlands is currently growing in recognition and appreciation. In addition to the value provided by extracted resources and ecological regulation, wetlands also offer people the opportunity to enrich themselves through cultural, educational, and recreational pursuits. The state parks of Virginia provide access to a variety of ecosystems, including a wide array of wetland types. In this review, we document the diversity of wetlands in Virginia State Parks through a typology that groups wetland systems into the three principal …
Summer Food Habits Of Myotis Leibii In The Central Appalachians Ecoregion And Comparison To Similar Studies, John O. Whitaker Jr., Virgil Brack Jr., James D. Kiser Jr.
Summer Food Habits Of Myotis Leibii In The Central Appalachians Ecoregion And Comparison To Similar Studies, John O. Whitaker Jr., Virgil Brack Jr., James D. Kiser Jr.
Virginia Journal of Science
Food habits of Myotis leibii, Eastern Small-footed Myotis, were studied during summer in the Central Appalachians Ecoregion. Moths were 70.0% of the diet by volume and were in 97.7% of samples (percent frequency). Beetles, flies, and spiders comprised much of the remaining diet. Percent volume and percent frequency metrics produce similar results. These data and past studies indicate this bat eats a relatively low-diversity diet centered on terrestrial-based arthropod prey across a broad geographical area, irrespective of season, sex, or age. The presence of spiders in the diet may indicate gleaning.
Remote Detection Of Disturbance From Motorized Vehicle Use In Appalachian Wetlands, Walter Smith
Remote Detection Of Disturbance From Motorized Vehicle Use In Appalachian Wetlands, Walter Smith
Virginia Journal of Science
Wetland disturbance from motorized vehicle use is a growing concern across the Appalachian coalfields of southwestern Virginia and portions of adjacent states, particularly as both extractive industries and outdoor recreation development expand in regional communities. However, few attempts have been made in this region or elsewhere to adapt approaches that can assist researchers and land managers in remotely identifying and monitoring wetland habitats disturbed by motorized vehicle use. A comparative analysis of wetlands impacted and unimpacted by off-road vehicle activity at a public recreation area in Tazewell County, Virginia was conducted to determine if and how a common, satellite-derived index …
Camera Trap Survey Suggests Forestry And Prescribed Burns Attract Wildlife, But May Not Enhance Diversity, Melissa S. Vilgats, Ryan Ott, Stephanie S. Coster
Camera Trap Survey Suggests Forestry And Prescribed Burns Attract Wildlife, But May Not Enhance Diversity, Melissa S. Vilgats, Ryan Ott, Stephanie S. Coster
Virginia Journal of Science
This study explored whether habitat management techniques such as forest thinning and burning promoted biodiversity. Fifteen camera trap stations were established at Fort A.P. Hill in Bowling Green, VA across forest stands with low, medium, and high basal area. Camera traps were deployed for a total of 532 trap nights, and trap success and species diversity were calculated using Shannon’s index. At each site, the distance to trafficable roadways and water sources, vegetation composition, and the percent groundcover, canopy cover, and understory were measured. The cameras captured nine species and recorded a total of 398 trap events. Linear regression was …
The Effect Of Storm Events On Diet Of Adult Mummichogs (Fundulus Heteroclitus), Jessica S. Thompson, Cade P. Cobbs, Emma S. Dryden, Heather D. Harwell
The Effect Of Storm Events On Diet Of Adult Mummichogs (Fundulus Heteroclitus), Jessica S. Thompson, Cade P. Cobbs, Emma S. Dryden, Heather D. Harwell
Virginia Journal of Science
More frequent storms due to climate change may impact estuarine species such as the mummichog (Fundulus hetereoclitus), an ecologically important salt marsh fish. This study investigated the effect of storm events and month on consumption of terrestrial insects by mummichogs in Hoffler Creek, Portsmouth, VA, as well as the effect of storms on consumption of major categories of benthic prey. Samples were taken monthly in the summers of 2017 and 2019. Additional paired samples were taken in June and July 2019, with the first collection during dry weather and the second during a subsequent storm. Month had a …
Habitat Partitioning And Associated Morphological Differences Among Three Species Of Catostomidae (Teleostei: Actinopterygii) In The South Fork Roanoke River, Virginia, Steven L. Powers, Dakota R. Spruill
Habitat Partitioning And Associated Morphological Differences Among Three Species Of Catostomidae (Teleostei: Actinopterygii) In The South Fork Roanoke River, Virginia, Steven L. Powers, Dakota R. Spruill
Virginia Journal of Science
The upper Roanoke River has 11 species of Catostomidae including Thoburnia rhothoeca, Torrent Sucker; Moxostoma cervinum, Blacktip Jumprock; and Moxostoma ariommum, Bigeye Jumprock. Resource partitioning appears to be a key component of maintaining diverse fish assemblages with habitat and food partitioning cited as especially important in communities containing members of the same family. The diets of these species have been documented in previous work revealing only modest differences among them. Snorkeling observations and subsequent quantification of microhabitat were conducted to illuminate habitat partitioning among these morphologically and ecologically similar species. Thoburnia rhothoeca inhabited the shallowest, fastest water, over the …
Identification Of Planktothrix (Cyanobacteria) Blooms And Effects On The Aquatic Macroinvertebrate Community In The Non-Tidal Potomac River, Usa, Joshua Henesy, Jennifer L. Wolny, John E. Mullican, Detbra S. Rosales, Joseph S. Pitula, Joseph W. Love
Identification Of Planktothrix (Cyanobacteria) Blooms And Effects On The Aquatic Macroinvertebrate Community In The Non-Tidal Potomac River, Usa, Joshua Henesy, Jennifer L. Wolny, John E. Mullican, Detbra S. Rosales, Joseph S. Pitula, Joseph W. Love
Virginia Journal of Science
Using transverse cross-sectional transects, a survey of 31 km of the non-tidal Potomac River was conducted from White’s Ferry, Virginia to Brunswick, Maryland, USA, between June and September in 2013 through 2015 to assess a recurring benthic cyanobacteria bloom. Abundant benthic cyanobacteria blooms were detected during the 2014 and 2015 sampling seasons and the primary taxon was identified morphologically and molecularly as Planktothrix cf. isothrix. When present, P. cf. isothrix blooms were concentrated from river center to the Maryland shoreline. This pattern was correlated with significantly greater benthic chlorophyll-a and phycocyanin concentrations. In an apparent response to …
Central Administration Of Agouti-Related Peptide Increases Food Intake In Japanese Quail, Tyler Lindskoog, Mark Bohler, Elizabeth R. Gilbert, Mark A. Cline
Central Administration Of Agouti-Related Peptide Increases Food Intake In Japanese Quail, Tyler Lindskoog, Mark Bohler, Elizabeth R. Gilbert, Mark A. Cline
Virginia Journal of Science
Agouti-related peptide is a 132-amino acid peptide associated with stimulating food intake in birds and mammals. The aim of the present study was to investigate the effect of AgRP in 7-day old Japanese quail. In Experiment 1, we tested 0.25, 0.5 and 1.0 nmol AgRP and found no effect on food intake or water intake over a 3 hour duration. In Experiment 2, we tested we tested 0.25, 0.5 and 1.0 nmol AgRP and found no effect on food or water intake over a 24 hour duration. In Experiment 3, we tested 0.0625 and 0.125 nmol AgRP and found no …
Assessing Microplastic Pollution In Four Mile Run, An Urban Stream In Northern Virginia, Kurt Moser, Tessa Naughton-Rockwell, Louisa Wang, Ethan Litmans, Amanda Manoogian
Assessing Microplastic Pollution In Four Mile Run, An Urban Stream In Northern Virginia, Kurt Moser, Tessa Naughton-Rockwell, Louisa Wang, Ethan Litmans, Amanda Manoogian
Virginia Journal of Science
Microplastics are pollutants of concern in waterways and oceans for their persistence and impact on aquatic life and food webs. This study demonstrates a low-cost land-based sampling method to assess the extent of microplastic pollution found in Four Mile Run, an urban stream in Northern Virginia. Microplastic particle counts in environmental and treated wastewater ranged from 0.01-0.24 particles L-1 (mean 0.08 particles L-1) and from 2 to 446 µg L-1 (mean 70 µg L-1), with fibers found to be the most common microplastic category. Treated wastewater effluent was found to be a significant source …
Survival Of Enterococcus FaeciumIn Turkey Litter Under Different Temperature And Moisture Combinations, Steven G. Mcbride, Benjamin Holland, Pradeep Vasudevan, Joanna B. Mott
Survival Of Enterococcus FaeciumIn Turkey Litter Under Different Temperature And Moisture Combinations, Steven G. Mcbride, Benjamin Holland, Pradeep Vasudevan, Joanna B. Mott
Virginia Journal of Science
Untreated poultry litter introduces a substantial load of fecal pathogens to the environment, impacting agriculture, public health and ecosystem function. There is substantial evidence that temperature and moisture are the primary drivers of fecal bacteria survival across ecosystems. However, both temperature and moisture effects have been shown to be modulated by the matrix in which the fecal bacteria are living. This context dependence highlights the importance of understanding fecal bacteria survival in a variety of matrices in order to implement effective waste management plans. In this study, we determined the survival patterns of Enterococcus faecium in post-use turkey litter under …
The Diversity And Distribution Of Spiders (Arachnida: Araneae) Along An Outdoor – Indoor Habitat Gradient: Preliminary Findings From Piedmont Virginia, William Kish, Sujan Henkanaththegedara
The Diversity And Distribution Of Spiders (Arachnida: Araneae) Along An Outdoor – Indoor Habitat Gradient: Preliminary Findings From Piedmont Virginia, William Kish, Sujan Henkanaththegedara
Virginia Journal of Science
Although the United States supports a considerable diversity of spiders, some aspects of spider habitat use and niche specialization are poorly documented. Specifically, little attention has been given to explore how urban development affects the diversity and abundance of arthropods. We sampled spiders along an outdoor – indoor habitat gradient at Longwood University to understand the impact of urbanization on species diversity and abundance. We found 50 taxa of spiders belonging to 43 genera and 16 families. Overall, the most abundant spider family across three sampling sites was Araneidae (orb-weavers; 18.2%) followed by Lycosidae (wolf spiders; 14.8%), Salticidae (jumping spiders; …
Stream Assessment On The Impact Of Agricultural Activity In The Dry River, Va, Heston Anderson, Nate Bickford
Stream Assessment On The Impact Of Agricultural Activity In The Dry River, Va, Heston Anderson, Nate Bickford
Virginia Journal of Science
Stream Bioassessments using macroinvertebrate population dynamics is a technique that determines water quality in natural aquatic environments based on the taxa found at the site. The aim of this study is to determine if agricultural activity in Rockingham County, VA has an impact on water quality in Dry River. Stream quality was evaluated by sampling and identifying macroinvertebrate taxa at various sites above and below disturbances. Each individual was ranked from 1-10 based on pollution tolerance or intolerance using the Biological Monitoring Working Party Index. The results in this study indicate that agricultural activity does impact water quality in Dry …
Pollinator Visitation Frequency Associated With Native And Non-Native Plants In A Mid-Atlantic Piedmont (Usa) Urban Garden, Nicholas J. Ruppel, Saunders M. Riley, Ellis D. Mumford, Barbara L. Swedo
Pollinator Visitation Frequency Associated With Native And Non-Native Plants In A Mid-Atlantic Piedmont (Usa) Urban Garden, Nicholas J. Ruppel, Saunders M. Riley, Ellis D. Mumford, Barbara L. Swedo
Virginia Journal of Science
The recent focus on the importance of native plants and their pollinators has highlighted the critical role of local species in their natural environment. As urban encroachment, climate change, and invasive species continues to threaten native habitats, it is increasingly important to promote the use of local green spaces as refugia for native plants and their pollinators. The aim of this project, therefore, was to identify and assess the visitation frequency of insect pollinators associated with an urban setting within the Piedmont region of Virginia, and compare their association with native versus closely-related but non-native summer-flowering plants. Several modes of …
Microhabitat Comparison Of Percina Roanoka (Roanoke Darter) And Percina Nevisense (Chainback Darter) In The Roanoke River, Dakota R. Spruill, Steven L. Powers
Microhabitat Comparison Of Percina Roanoka (Roanoke Darter) And Percina Nevisense (Chainback Darter) In The Roanoke River, Dakota R. Spruill, Steven L. Powers
Virginia Journal of Science
Snorkel observations of Percina roanoka and P. nevisense in the Roanoke River during summer months were followed by measuring current velocity, water depth, and substrate diameter at points of occupation. A total of 89 observations of P. roanoka and 81 observations of P. nevisense were compared using two-sample T-tests. Percina roanoka inhabited faster, shallower water than P. nevisense with the former found in a mean flow of 0.318 m/s and depth of 31.53 cm and the latter in a mean flow of 0.17 m/s and depth of 55.6 cm. Mean diameter of substrate at points of occupation did not differ …
Reproductive Correlates Of A Perineal Gland In The Hispid Cotton Rat, Robert K. Rose, Julie A. Winchell
Reproductive Correlates Of A Perineal Gland In The Hispid Cotton Rat, Robert K. Rose, Julie A. Winchell
Virginia Journal of Science
During studies of the annual cycle of reproduction in the hispid cotton rat (Sigmodon hispidus) in southeastern Virginia, we discovered an anal (more specifically, perineal) gland that is present only in males during the breeding season. The perineal gland encircles the lower end of the rectum and has ductal connections to the urethra, through which its secretions likely are delivered. This fatty gland is highly developed in breeding males but, like the testes and seminal vesicles, regresses during the winter non-breeding season. The prominence and cyclicity of the perineal gland suggests that it somehow facilitates normal reproduction. The …
Compositional Changes In Two Small Mammal Communities During Succession In Southeastern Virginia, Robert K. Rose, Robyn M. Nadolny, Jay Kiser, Stephen E. Rice, Heather Green Salamone, Jana Eggleston, Holly D. Gaff
Compositional Changes In Two Small Mammal Communities During Succession In Southeastern Virginia, Robert K. Rose, Robyn M. Nadolny, Jay Kiser, Stephen E. Rice, Heather Green Salamone, Jana Eggleston, Holly D. Gaff
Virginia Journal of Science
Changes in the composition of two small mammal communities were studied during 8 and 9 years of ecological succession in southern Chesapeake. Virginia. Using monthly live-trapping on grids of similar size and history since their abandonment as agricultural fields, we learned that house mice were early colonists on one grid but not the other. Two species of herbivorous rodent and the granivorous eastern harvest mouse were numerically dominant on both grids across the study. Some species disappeared early on one grid but persisted to the end at the other. The two arboreal small mammals, golden and white-footed mice, were most …
Habitat Use By Bats On The Upper Coastal Plain Of Virginia, A. Scott Bellows, Joseph C. Mitchell
Habitat Use By Bats On The Upper Coastal Plain Of Virginia, A. Scott Bellows, Joseph C. Mitchell
Virginia Journal of Science
We monitored bat activity on the upper Coastal Plain of Virginia using mist nets and acoustic detection (ANABAT) during April-October 2000 and April-August 2001. We classified forty sites into three forest-cover classes (pine forest, mixed pine, and hardwood forest) and three landscape-feature classes (permanent water, riparian corridor, and upland). We captured 406 bats (8 species) in mist nets; red bats (Lasiurus borealis; n = 281), big brown bats (Eptesicus fuscus; n = 47), and eastern pipistrelles (Pipistrellus subflavus; n = 36) were the most commonly captured species. We captured fewer than 30 individuals of …
The Effects Of Climate On Radial Growth Of Disjunct Northern White Cedar (Thuja Occidentalis L.) In Virginia, Joshua A. Kincaid
The Effects Of Climate On Radial Growth Of Disjunct Northern White Cedar (Thuja Occidentalis L.) In Virginia, Joshua A. Kincaid
Virginia Journal of Science
Understanding the geographic range and growth of species is essential for effective land management in a landscape affected by anthropogenic activity and climate change. Climate change is expected to alter the distribution and growth of many tree species in eastern North America, including northern white cedar (Thuja occidentalis L.). This research examined the effects of climate on radial growth of T. occidentalis in disjunct populations south of its continuous range margin in eastern North America. A T. occidentalis tree-ring chronology was developed and examined for growth-climate interactions. Mean sensitivity of the T. occidentalis chronology was within the range of …
Predation On Artificial Turkey Nests At Radford Army Ammunition Plant In Western Virginia, Shane Brandes, Karen E. Powers, Len L. Diioia Jr.
Predation On Artificial Turkey Nests At Radford Army Ammunition Plant In Western Virginia, Shane Brandes, Karen E. Powers, Len L. Diioia Jr.
Virginia Journal of Science
Because ground-nesting wild turkeys (Meleagris gallopavo) may sustain high incidences of nest predation in western Virginia, determining their predators is essential to understanding risk and managing the birds. Our study investigated potential predators of wild turkey nests at the Radford Army Ammunition Plant, New River Unit (RFAAP; Pulaski Co., in western Virginia). Here, we established 8 artificial nests during the breeding season for wild turkey (March-April, 2017), and documented predators via game cameras. Thirty-one species of mammals and birds visited the nests over the 31-day study. Nest predation was verified 56 times across 6 species, including coyotes ( …
Microstructure Of Attachment Mechanisms Of Newly Hatched Larvae Of Four Cyprinid Species With Comments On Terminology, George E. Maurakis, Eugene G. Maurakis
Microstructure Of Attachment Mechanisms Of Newly Hatched Larvae Of Four Cyprinid Species With Comments On Terminology, George E. Maurakis, Eugene G. Maurakis
Virginia Journal of Science
An adhesive organ is a prominent, protruding mucus secreting gland that is used by newly hatched tadpoles and larvae of some fishes to attach to aquatic vegetation. The objective of this research is to test the hypothesis that newly hatched cyprinid larvae of Hybognathus hankinsoni, Notemigonus crysoleucas, Cyprinus carpio and Gila atraria contain cephalic adhesive organs. Newly hatched larvae of Semotilus atromaculatus, which do not attach to submerged aquatic vegetation, were used as the control. SEM examination of newly hatched larvae indicate there were no adhesive organs on the control species (S. atromaculatus) or test species …
An Erythristic Morph Of Red-Backed Salamander (Plethodon Cinereus) Collected In Virginia, Trevor L. Chapman, Brian G. Gall, Kari L. Spivey
An Erythristic Morph Of Red-Backed Salamander (Plethodon Cinereus) Collected In Virginia, Trevor L. Chapman, Brian G. Gall, Kari L. Spivey
Virginia Journal of Science
Eight different color polymorphisms of the Red-backed Salamander (Plethodon cinereus) have been described throughout its range. Among them, the erythristic phenotype is a mimetic morph with coloration patterns similar to that of toxic Eastern Newt efts (Notophthalmus viridescens). We describe an erythristic morph of P. cinereus collected at Mountain Lake Biological Station, Virginia. To our knowledge, there are no prior published records of this morph in Virginia.
Population Dynamics Of The Cotton Rat In Southeastern Virginia, Robert K. Rose, Heather Green Salamone
Population Dynamics Of The Cotton Rat In Southeastern Virginia, Robert K. Rose, Heather Green Salamone
Virginia Journal of Science
Abstract
We used monthly live trapping for 2.5 years to evaluate the life-history features of the most common small mammal, Sigmodon hispidus (hispid cotton rat), in an old field at its northern limit of distribution on the Atlantic coast. Peak densities, achieved in late autumn or early winter, were among the highest recorded for the species and were more typical of marginal populations rather than of central ones. Unlike some other marginal populations, hispid cotton rats in eastern Virginia did not lose significant body mass over the winter (when few juveniles were present) and survival in winter was not significantly …
Section Abstracts: Entomology
Virginia Journal of Science
Abstracts of the Entomology Section for the 94th Annual Virginia Academy of Science Meeting, May 18-20, 2016, at University of Mary Washington, Fredericksburg, VA.
Section Abstracts: Natural History And Biodiversity
Section Abstracts: Natural History And Biodiversity
Virginia Journal of Science
Abstracts of the Natural History and Biodiversity Section for the 94th Annual Virginia Academy of Science Meeting, May 18-20, 2016, at University of Mary Washington, Fredericksburg, VA.
Section Abstracts: Structural Biology, Biochemistry, And Biophysics
Section Abstracts: Structural Biology, Biochemistry, And Biophysics
Virginia Journal of Science
Abstracts of the Structural Biology, Biochemistry, and Biophysics Section for the 94th Annual Virginia Academy of Science Meeting, May 18-20, 2016, at University of Mary Washington, Fredericksburg, VA.
A New Long-Tailed Weasel County Record In Shenandoah National Park, Jason V. Lombardi, Michael T. Mengak, Steven B. Castleberry, V. K. Terrell, Mike Fies
A New Long-Tailed Weasel County Record In Shenandoah National Park, Jason V. Lombardi, Michael T. Mengak, Steven B. Castleberry, V. K. Terrell, Mike Fies
Virginia Journal of Science
Though abundant throughout much of its range, the ecology and local geographic distribution of Mustela frenata (Long-tailed Weasel) is not well-known, especially in the central Appalachian Mountains. In 2015, we conducted a camera study in rock outcrop habitats within Shenandoah National Park, Virginia. Our objective was to determine the presence of mammals considered uncommon in these habitats. After 2,016 trap nights, we report eleven photographic captures of Long-tailed Weasels at eight sites. Two of these sites represent the first record of this species in Rappahannock County, Virginia. These detections represent the first record of Long-tailed Weasels in Shenandoah National Park …
Occupancy Rates And Detection Probabilities Of Red-Backed Salamanders On The Virginia Fall Line, Jay D. Mcghee
Occupancy Rates And Detection Probabilities Of Red-Backed Salamanders On The Virginia Fall Line, Jay D. Mcghee
Virginia Journal of Science
To meet the conservation needs of declining amphibian populations, there is a need to assess monitoring techniques in various habitat types and seasons. I assessed detection rates and proportion of area occupied via transect monitoring for red-backed salamanders at a site along the Virginia Fall Line in Doswell, Virginia. I established 24 transects in a 3.2-ha area in both riparian and upland habitats. Objects providing natural cover along these transects were sampled 3 times a week in fall and spring over a two-year period. Models of occupancy and detection were developed and compared using Akaike’s Information Criterion. Based on 113 …
Section Abstracts: Agriculture, Forestry And Aquaculture
Section Abstracts: Agriculture, Forestry And Aquaculture
Virginia Journal of Science
Abstracts of the Agriculture, Forestry and Aquaculture Section for the 94th Annual Virginia Academy of Science Meeting, May 18-20, 2016, at University of Mary Washington, Fredericksburg, VA.
Section Abstracts: Biology
Virginia Journal of Science
Abstracts of the Biology Section for the 94th Annual Virginia Academy of Science Meeting, May 18-20, 2016, at University of Mary Washington, Fredericksburg, VA.