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Articles 1 - 7 of 7
Full-Text Articles in Biology
Assessment Of Factors Influencing Migratory Landbird Use Of Forested Stopover Sites Along The Delmarva Peninsula During Autumn Migration, J. Andrew Arnold
Assessment Of Factors Influencing Migratory Landbird Use Of Forested Stopover Sites Along The Delmarva Peninsula During Autumn Migration, J. Andrew Arnold
Biological Sciences Theses & Dissertations
Autumn migration is a time when billions of birds move from breeding grounds in North America to wintering grounds in Central and South America, with many individuals relying on stopover habitats en route for resting and refueling purposes. These stopover sites are critical to the survival of the hundreds of species of migratory landbirds that migrate annually, and thus identifying important stopover sites is a high priority for conserving such taxa. The Delmarva Peninsula; a coastal region of Delaware, Maryland, and Virginia along the mid-Atlantic flyway; consists of forested habitats with ample food and shelter that likely serves as quality …
Drivers Of Rickettsial Pathogen Transmission And Spillover In Local Tick Populations In Southeastern Virginia, Alexandra Cumbie
Drivers Of Rickettsial Pathogen Transmission And Spillover In Local Tick Populations In Southeastern Virginia, Alexandra Cumbie
Biomedical Sciences Theses & Dissertations
Cases of spotted fever group rickettsiosis are becoming more prevalent in the United States. In Virginia, there are three human-biting ticks which are largely responsible for the spread of rickettsial pathogens and the increase in disease cases. These species include Dermacentor variabilis, Amblyomma americanum, and Amblyomma maculatum; all of which are vectors of rickettsial agents to vertebrate hosts. These species are sympatric as adults and have the potential to share large and small mammal hosts. Their interactions on and off host and their associated rickettsiae were the focus of this dissertation work. Amblyomma americanum is the vector …
Adaptive Divergence, Neutral Panmixia, And Algal Symbiont Population Structure In The Temperate Coral Astrangia Poculata Along The Mid-Atlantic United States, Hannah E. Aichelman, Daniel J. Barshis
Adaptive Divergence, Neutral Panmixia, And Algal Symbiont Population Structure In The Temperate Coral Astrangia Poculata Along The Mid-Atlantic United States, Hannah E. Aichelman, Daniel J. Barshis
Biological Sciences Faculty Publications
Astrangia poculata is a temperate scleractinian coral that exists in facultative symbiosis with the dinoflagellate alga Breviolum psygmophilum across a range spanning the Gulf of Mexico to Cape Cod, Massachusetts. Our previous work on metabolic thermal performance of Virginia (VA) and Rhode Island (RI) populations of A. poculata revealed physiological signatures of cold (RI) and warm (VA) adaptation of these populations to their respective local thermal environments. Here, we used whole-transcriptome sequencing (mRNA-Seq) to evaluate genetic differences and identify potential loci involved in the adaptive signature of VA and RI populations. Sequencing data from 40 A. poculata individuals, including 10 …
Diet Analysis Of Stranded Bottlenose Dolphins (Tursiops Truncatus) In Virginia, Kristen Marie Volker
Diet Analysis Of Stranded Bottlenose Dolphins (Tursiops Truncatus) In Virginia, Kristen Marie Volker
Biological Sciences Theses & Dissertations
This study describes the diet of bottlenose dolphins (Tursiops truncatus) stranded in Virginia via stomach content analysis and considers factors such as proportion of numerical abundance and reconstructed mass, frequency of occurrence, average reconstructed prey size, prey diversity and quantity, and otolith degradation code. Fish size was estimated via regression equations established from local fish collected during the study that derive wet weight directly from otolith length or width. Squid size is estimated from previously published equations. Soniferous fishes dominated the diet, especially Atlantic croaker, spot, and seatrout spp., adding evidence to the theory that bottlenose dolphins passively …
Apparent Resilience To Fire Of Native Bee (Hymenoptera: Apoidea) Communities From Upland Longleaf Pine Forests In Louisiana And Mississippi, Sara A. Simmons, Janice L. Bossart
Apparent Resilience To Fire Of Native Bee (Hymenoptera: Apoidea) Communities From Upland Longleaf Pine Forests In Louisiana And Mississippi, Sara A. Simmons, Janice L. Bossart
Biological Sciences Faculty Publications
Controlled burning is an essential tool for restoration and management of Pinus palustris (Longleaf Pine) habitats, yet effects of controlled burning on insect species, including pollinators, are rarely considered in conservation planning. We used blue vane traps to sample native bees (Hymenoptera: Apoidea) at recently burned and unburned sites in 2 Longleaf Pine upland forests in Mississippi and Louisiana. Our objective was to quantify short-term effects of controlled burns given fire-return intervals of 1-2 years are now regularly employed to manage Longleaf Pine woodlands. We sampled during 2016 and 2017 and collected 1777 native bees, representing 43 species. Recent fire …
The Natural History Of The Marsh Rice Rat, Oryzomys Palustris, In Eastern Virginia, Robert K. Rose
The Natural History Of The Marsh Rice Rat, Oryzomys Palustris, In Eastern Virginia, Robert K. Rose
Biological Sciences Faculty Publications
The marsh rice rat, Oryzomys palustris, is a common rodent in tidal marshes of eastern Virginia, including those on the barrier islands. It also is present in grassy old fields in upland habitats in the coastal plain and parts of the piedmont of Virginia. This report summarizes what has been learned in recent decades about the population biology of this species in Virginia, including aspects of behavior, density, diet, distribution, genetics, habitats, mammal associates, and reproduction.
Evolutionary Determinism And Convergence Associated With Water Column Transitions In Marine Fishes, Melissa Rincon-Sandoval, Emmanuelle Duarte-Ribeiro, Aaron M. Davis, Aintzane Santaquiteria, Lily C. Hughes, Carole C. Baldwin, Luisángely Soto-Torres, Arturo Acero P., H.J. Walker Jr, Kent E. Carpenter, Marcus Sheaves, Guillermo Orti, Dahiana Arcila, Ricardo Betancur-R.
Evolutionary Determinism And Convergence Associated With Water Column Transitions In Marine Fishes, Melissa Rincon-Sandoval, Emmanuelle Duarte-Ribeiro, Aaron M. Davis, Aintzane Santaquiteria, Lily C. Hughes, Carole C. Baldwin, Luisángely Soto-Torres, Arturo Acero P., H.J. Walker Jr, Kent E. Carpenter, Marcus Sheaves, Guillermo Orti, Dahiana Arcila, Ricardo Betancur-R.
Biological Sciences Faculty Publications
Repeatable, convergent outcomes are prima facie evidence for determinism in evolutionary processes. Among fishes, well-known examples include microevolutionary habitat transitions into the water column, where freshwater populations (e.g., sticklebacks, cichlids, and whitefishes) recurrently diverge toward slender-bodied pelagic forms and deep-bodied benthic forms. However, the consequences of such processes at deeper macroevolutionary scales in the marine environment are less clear. We applied a phylogenomics-based integrative, comparative approach to test hypotheses about the scope and strength of convergence in a marine fish clade with a worldwide distribution (snappers and fusiliers, family Lutjanidae) featuring multiple water-column transitions over the past 45 million years. …