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2013

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The Murray Ledger And Times, July 5, 2013, The Murray Ledger And Times Jul 2013

The Murray Ledger And Times, July 5, 2013, The Murray Ledger And Times

The Murray Ledger & Times

No abstract provided.

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Identification Of Species Of Botryosphaeriaceae Causing Bot Gummosis In Citrus In California, A.O. Adesemoye, J.S. Mayorquin, D.H. Wang, M. Twizeyimana, S.C. Lynch, Akif Eskalen Jul 2013

Identification Of Species Of Botryosphaeriaceae Causing Bot Gummosis In Citrus In California, A.O. Adesemoye, J.S. Mayorquin, D.H. Wang, M. Twizeyimana, S.C. Lynch, Akif Eskalen

Department of Plant Pathology: Faculty Publications

Members of the Botryosphaeriaceae family are known to cause Bot gummosis on many woody plants worldwide. To identify pathogens associated with Bot gummosis on citrus in California, scion and rootstock samples were collected in 2010 and 2011 from five citrusgrowing counties in California. Symptoms observed on citrus included branch cankers, dieback, and gumming. Various fungal species were recovered from necrotic tissues of branch canker and rootstock samples. Species were identified morphologically and by phylogenetic comparison as ‘Eureka’ lemon, ‘Valencia’, ‘Washington Navel’, ‘Fukumoto’, grapefruit, ‘Satsuma’, and ‘Meyer’ lemon. Species were identified morphologically and by phylogenetic comparison of the complete sequence of …

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Eyeth: A Novel For The Deaf, Kelsey Young Jul 2013

Eyeth: A Novel For The Deaf, Kelsey Young

Undergraduate University Honors Capstones

Kelsey Young’s science fiction novel Eyeth, to use Tom Humphries’ phrase, is important for deaf literature because it exemplifies “culture talking” not the proof (“talking culture”) of a monolithic culture apart from the mainstream but complex deaf life on its own terms. It also focuses on a wide range of deaf people involved in intra-­deafcentric conflicts; deaf sub-­‐groups include a range of communication preferences (speaking, cued speech, signing) as well as multiple physical differences (deaf-­blind, cerebral palsy, wheelchair users) though not ethnic diversity. A critical introduction to the novel explains that science fiction allows the creation of a world that …

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Rapid Staining Method To Detect And Identify Downy Mildew (Peronospora Belbahrii) In Basil1, Adolfina R. Koroch, Thomas S. Villani, Robert M. Pyne, James E. Simon Jul 2013

Rapid Staining Method To Detect And Identify Downy Mildew (Peronospora Belbahrii) In Basil1, Adolfina R. Koroch, Thomas S. Villani, Robert M. Pyne, James E. Simon

Publications and Research

• Premise of the study: Demand for fresh-market sweet basil continues to increase, but in 2009 a new pathogen emerged, threatening commercial field/greenhouse production and leading to high crop losses. This study describes a simple and effective staining method for rapid microscopic detection of basil downy mildew (Peronospora belbahrii) from leaves of basil (Ocimum basilicum). • Methods and Results: Fresh leaf sections infected with P. belbahrii were placed on a microscope slide, cleared with Visikol™, and stained with iodine solution followed by one drop of 70% sulfuric acid. Cell walls of the pathogen were stained with a distinct coloration, providing …

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Species Delimitation And Morphological Divergence In The Scorpion Centruroides Vittatus (Say, 1821): Insights From Phylogeography, Tsunemi Yamashita, Douglas D. Rhoads Jul 2013

Species Delimitation And Morphological Divergence In The Scorpion Centruroides Vittatus (Say, 1821): Insights From Phylogeography, Tsunemi Yamashita, Douglas D. Rhoads

Faculty Publications - Biological Sciences

Scorpion systematics and taxonomy have recently shown a need for revision, partially due to insights from molecular techniques. Scorpion taxonomy has been difficult with morphological characters as disagreement exists among researchers with character choice for adequate species delimitation in taxonomic studies. Within the family Buthidae, species identification and delimitation is particularly difficult due to the morphological similarity among species and extensive intraspecific morphological diversity. The genus Centruroides in the western hemisphere is a prime example of the difficulty in untangling the taxonomic complexity within buthid scorpions. In this paper, we present phylogeographic, Ecological Niche Modeling, and morphometric analyses to further …

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Design And Development Of Remote Measurement For Prime Mover Using Arduino And Fr Hope Rfm12b / Mohd Akmal Mhd Yusoff, Mhd Yusoff Mohd Akmal Jul 2013

Design And Development Of Remote Measurement For Prime Mover Using Arduino And Fr Hope Rfm12b / Mohd Akmal Mhd Yusoff, Mhd Yusoff Mohd Akmal

Student Works (2010-2019)

This project aims to develop a remote measurement system for agricultural prime mover for in-field testing. The system is important especially for government agency such as MARDI which is entrusted to carry out research and development in agriculture including developing agricultural prime mover. RF system has been chosen as the remote wireless system to be used in this project. The hardware system consists of a measurement system, a transmitter and receiver system and a data monitoring system. The measurement system consists of Honeywell 1228-2K Torque sensor & FUTEK CSG110 Strain gauge amplifier. The Honeywell torque sensor was chosen because it …

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A Substrate-Induced Biotin Binding Pocket In The Carboxyltransferase Domain Of Pyruvate Carboxylase, Adam D. Lietzan, Martin St. Maurice Jul 2013

A Substrate-Induced Biotin Binding Pocket In The Carboxyltransferase Domain Of Pyruvate Carboxylase, Adam D. Lietzan, Martin St. Maurice

Biological Sciences Faculty Research and Publications

Biotin-dependent enzymes catalyze carboxyl transfer reactions by efficiently coordinating multiple reactions between spatially distinct active sites. Pyruvate carboxylase (PC), a multifunctional biotin-dependent enzyme, catalyzes the bicarbonate- and MgATP-dependent carboxylation of pyruvate to oxaloacetate, an important anaplerotic reaction in mammalian tissues. To complete the overall reaction, the tethered biotin prosthetic group must first gain access to the biotin carboxylase domain and become carboxylated and then translocate to the carboxyltransferase domain, where the carboxyl group is transferred from biotin to pyruvate. Here, we report structural and kinetic evidence for the formation of a substrate-induced biotin binding pocket in the carboxyltransferase domain of …

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Discovery Of The Rare Freshwater Brown Alga Pleurocladia Lacustris (Ectocarpales, Phaeophyceae) In California Streams, John D. Wehr, Rosalina Stancheva, Kam Truhn, Robert G. Sheath Jul 2013

Discovery Of The Rare Freshwater Brown Alga Pleurocladia Lacustris (Ectocarpales, Phaeophyceae) In California Streams, John D. Wehr, Rosalina Stancheva, Kam Truhn, Robert G. Sheath

Western North American Naturalist

Pleurocladia lacustris A. Braun is a freshwater member of the Phaeophyceae, a class of algae that occurs almost entirely in marine waters. It has previously been reported from only about 13 freshwater locations worldwide, just 2 of which are in North America. Outside of North America, P. lacustris has been listed as a threatened species on several European red lists. In this paper, we report the discovery of P. lacustris in 3 calcareous streams draining the Santa Lucia Mountains in coastal California, sites that are more than 1200 km from the nearest known population. Pleurocladia lacustris is a filamentous, benthic …

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Diel Cover Use And Local Site Fidelity Of A Large Southwestern Cyprinid, Bonytail Gila Elegans, In A Lower Colorado River Backwater, Paul C. Marsh, Gordon A. Mueller, Michael R. Schwemm Jul 2013

Diel Cover Use And Local Site Fidelity Of A Large Southwestern Cyprinid, Bonytail Gila Elegans, In A Lower Colorado River Backwater, Paul C. Marsh, Gordon A. Mueller, Michael R. Schwemm

Western North American Naturalist

Sonic transmitters were affixed to 10 large (40.4–51.4 cm TL) adult bonytail Gila elegans in 2003 from Cibola High Levee Pond, a small, isolated backwater adjacent to the lower Colorado River in Arizona and California. Point and paired directional observations showed that all marked adult bonytail occupied interstices of large riprap during daytime and used open water areas during darkness, presumably to feed. There were 2 spatial patterns of nighttime distribution by adult fish: 70% of fish exhibited mesohabitat site fidelity to a particular area of the pond, while others appeared to move about at random. Selection or design of …

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Influence Of Water Conductivity On Amphibian Occupancy In The Greater Yellowstone Ecosystem, Robert W. Klaver, Charles R. Peterson, Debra A. Patla Jul 2013

Influence Of Water Conductivity On Amphibian Occupancy In The Greater Yellowstone Ecosystem, Robert W. Klaver, Charles R. Peterson, Debra A. Patla

Western North American Naturalist

Investigation of amphibian occupancy at potential breeding sites can provide information about the distribution and relative abundance of species, as well as insights into habitat relationships across large areas such as national parks. Based on previous research in the Greater Yellowstone Ecosystem (GYE), we hypothesized that the probability of amphibian occupancy increases with water conductivity. We conducted amphibian surveys with habitat measurements at 235 wetland sites in the GYE in 2002, thereby locating breeding populations of boreal toads (Anaxyrus boreas), boreal chorus frogs (Pseudacris maculata), Columbia spotted frogs (Lithobates luteiventris), and barred tiger salamanders …

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Studies On Distribution And Diversity Of Nearshore Ephemeroptera And Plecoptera In Selected Lakes Of Glacier National Park, Montana, Robert L. Newell, Richard W. Baumann Jul 2013

Studies On Distribution And Diversity Of Nearshore Ephemeroptera And Plecoptera In Selected Lakes Of Glacier National Park, Montana, Robert L. Newell, Richard W. Baumann

Western North American Naturalist

Surveys were performed to examine the diversity of Ephemeroptera and Plecoptera in selected lakes in Glacier National Park, Montana, and to generate data for use by the National Park Service. Shallow shoreline sites were sampled by disturbing the bottom and examining the substratum. Published records and previously collected reference specimens were examined. Data were obtained from a total of 29 lakes, but 3 yielded no mayflies or stoneflies. Twelve genera and 21 species of Ephemeroptera, and 11 genera and 5 species of Plecoptera, were found. Most lakes sampled had a diverse fauna of both orders.


Se realizaron monitoreos en donde …

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Oreoleptis Torrenticola Zloty, Sinclair And Pritchard (Diptera: Tabanomorpha) Discovered In A Fourth-Order Stream Of The Cascade Mountains Of Eastern Washington, Timothy D. Hatten, Russell Biggam, John Jorgensen, Paul Anders Jul 2013

Oreoleptis Torrenticola Zloty, Sinclair And Pritchard (Diptera: Tabanomorpha) Discovered In A Fourth-Order Stream Of The Cascade Mountains Of Eastern Washington, Timothy D. Hatten, Russell Biggam, John Jorgensen, Paul Anders

Western North American Naturalist

The recently described Oreoleptis torrenticola Zloty, Sinclair and Pritchard (Diptera: Tabanomorpha), belonging to the monotypic family Oreoleptidae, was previously described from the Northern Rocky Mountains of the USA and Canada. However, as part of a broad, multidisciplinary study by the Yakama Nation, 30 larvae of O. torrenticolawere collected at multiple sites within the Twisp River of the Cascade Mountains in Okanogan County, Washington, 2008–2010. This finding represents a substantial range extension for the species.


La especie, recientemente descrita, Oreoleptis torrenticola Zloty, Sinclair y Pritchard (Díptero Tabanomorpha), de la familia monotípica Oreoleptidae, provenía de las Montañas Rocosas del Norte de …

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Biological Notes And Range Expansion Of The Non-Biting Midge Odontomesa Fulva (Kieffer) (Diptera: Chironomidae), Iain D. Phillips, Dale Parker, Brittney M. Hoemsen, Aaron J. Bell, Douglas P. Chivers Jul 2013

Biological Notes And Range Expansion Of The Non-Biting Midge Odontomesa Fulva (Kieffer) (Diptera: Chironomidae), Iain D. Phillips, Dale Parker, Brittney M. Hoemsen, Aaron J. Bell, Douglas P. Chivers

Western North American Naturalist

During research on brook trout (Salvelinus fontinalis [Mitchill]), we collected larval and pupal specimens of the midge Odontomesa fulva(Kieffer) (Diptera: Chironomidae) from Pine Cree Creek, in the Cypress Hills area of the Northern Great Plains of Saskatchewan, Canada. This record is the first observation of O. fulva from the province. The larvae of the population of O. fulva in this study prefer shallow pools in this first-order, cold water stream. The species displays a univoltine emergence phenology. This range extension of O. fulva highlights and reinforces the importance of the Cypress Hills to the unique aquatic faunal biodiversity …

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Catching Large Groups Of Ravens: A Note On Procedures Using Rocket Nets, Richard J. Camp, Mark Hagan, William I. Boarman, Shannon J. Collis, Wanda S. Deal Jul 2013

Catching Large Groups Of Ravens: A Note On Procedures Using Rocket Nets, Richard J. Camp, Mark Hagan, William I. Boarman, Shannon J. Collis, Wanda S. Deal

Western North American Naturalist

Capturing Common Ravens (Corvus corax) is very difficult. Several methods are currently used, but none effectively catch large numbers (>25 birds) of ravens at one time. Efficient capture of large numbers of ravens is needed for some autecology studies. We describe and evaluate the effectiveness of using a prebaited rocket net trapping method for simultaneously capturing large numbers of ravens. The study sites were within 2 landfills in California’s Mojave Desert, one at Edwards Air Force Base and the other at Fort Irwin National Training Center. We captured 283 ravens on 5 trapping occasions between 1995 and …

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End Matter, Vol. 73 No. 2 Jul 2013

End Matter, Vol. 73 No. 2

Western North American Naturalist

No abstract provided.

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Biogeography And Evolution Of Neotropical Small Mammals, With Emphasis On Hystricognath Spiny Rats Of The Genus Proechimys (Family Echimyidae), Rafael Do Nascimento Leite Jul 2013

Biogeography And Evolution Of Neotropical Small Mammals, With Emphasis On Hystricognath Spiny Rats Of The Genus Proechimys (Family Echimyidae), Rafael Do Nascimento Leite

Theses and Dissertations

The Neotropical region is the most biologically diverse region on the planet. The region encompasses a variety of ecosystems and has long been the target of researchers interested in patterns of species diversity and distribution. More recently, molecular data have been incorporated into methods for reconstructing the historical relationships among geographical areas and their biotas. Molecular phylogenetics has provided insights into diversification patterns and the influence of Late Cenozoic events on the evolutionary history of the region. Nevertheless, considering the vast extent and complexity of the region, more studies are needed to fully appreciate the patterns of biogeography and the …

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Parowan Valley Potting Communities: Examining Technological Style In Fremont Snake Valley Corrugated Pottery, Scott M. Ure Jul 2013

Parowan Valley Potting Communities: Examining Technological Style In Fremont Snake Valley Corrugated Pottery, Scott M. Ure

Theses and Dissertations

Defining the Fremont archaeological culture has challenged archaeologists for decades. There is still considerable debate about the origins of the Fremont, their eventual demise, their genetic relationship to modern Native American tribes, and myriad other issues. In nearly a century of Fremont research, socio-political, economic, and religious complexity remain elusive subjects. Examining technological style, the manifestation of socially influenced choices during each step of production as a means of passive communication, is one useful avenue to examine Fremont material culture to uncover the social patterns they may, or may not contain. I examine whether or not technological style in Fremont …

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Developmental Signaling Requires Inwardly Rectifying K+ Channels In Drosophila Melanogaster, Giri Raj Dahal Jul 2013

Developmental Signaling Requires Inwardly Rectifying K+ Channels In Drosophila Melanogaster, Giri Raj Dahal

Theses and Dissertations

Inwardly rectifying potassium (IRK/Kir) channels regulate intracellular K+ concentrations and membrane potential. Disruption of Kir2.1 causes dominantly inherited Andersen Tawil Syndrome (ATS). ATS patients suffer from cardiac arrhythmias, periodic paralysis, and cognitive impairment. These symptoms are consistent with current understanding of the role of ion channels in muscle cells and neurons. However, ATS symptoms also include craniofacial and digital deformities such as cleft palate, dental defects, wide set eyes, low set ears, and crooked or fused digits. These developmental defects were not consistent with current understanding of developmental signaling or previously described roles for ion channels. We found that phenotypes …

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Susceptibility Of Apoptotic Cells To Hydrolysis By Spla2: Molecular Basis And Mechanisms Defined, Elizabeth Gibbons Jul 2013

Susceptibility Of Apoptotic Cells To Hydrolysis By Spla2: Molecular Basis And Mechanisms Defined, Elizabeth Gibbons

Theses and Dissertations

Secretory phospholipase A2 hydrolyzes phospholipids at a lipid-water interface, resulting in pro-inflammatory products being released from cell membranes. Healthy cells are resistant to cleavage by this enzyme, but apoptotic cells become susceptible to its activity. Only bilayers with certain characteristics are able to be hydrolyzed. Most recently, studies in this lab have emphasized the idea that the biophysical state of the bilayer (in terms of lipid order, spacing, and fluidity) is relevant in determining the probability of one phospholipid escaping the membrane to be hydrolyzed. Prior to this study, it had been shown that apoptotic cells undergo biophysical alterations that …

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Personhood And Cloning: Modern Applications And Ethics Of Stem Cell And Cloning Technology, Sariah Cottrell Mccarrey Jul 2013

Personhood And Cloning: Modern Applications And Ethics Of Stem Cell And Cloning Technology, Sariah Cottrell Mccarrey

Theses and Dissertations

Within many communities and religions, including the LDS community, there is some controversy surrounding the use of stem cells – particularly embryonic stem cells (ESC). Much of this controversy arises from confusion and misconceptions about what stem cells actually are, where they come from , and when life begins. The theology of the Church of Jesus Christ of Latter-day Saints has interesting implications for the last of these considerations, and it becomes less a question of “when does life begin” and more an exploration of “when does personhood begin” or “when does the spirit enter the body.” With no official …

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Aqueous Henry's Law Constants, Infinite Dilution Activity Coefficients, And Water Solubility: Critically Evaluated Database, Experimental Analysis, And Prediction Methods, Sarah Ann Brockbank Jul 2013

Aqueous Henry's Law Constants, Infinite Dilution Activity Coefficients, And Water Solubility: Critically Evaluated Database, Experimental Analysis, And Prediction Methods, Sarah Ann Brockbank

Theses and Dissertations

A database containing Henry's law constants, infinite dilution activity coefficients and solubility data of industrially important chemicals in aqueous systems has been compiled. These properties are important in predicting the fate and transport of chemicals in the environment. The structure of this database is compatible with the existing DIPPR® 801 database and DIADEM interface, and the compounds included are a subset of the compounds found in the DIPPR® 801 database. Thermodynamic relationships, chemical family trends, and predicted values were carefully considered when designating recommended values. Henry's law constants and infinite dilution activity coefficients were measured for toluene, 1-butanol, anisole, 1,2-difluorobenzene, …

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Habitat Interaction Between Two Species Of Chipmunk In The Basin And Range Province Of Nevada, Christopher Lowrey, Kathleen Longshore Jul 2013

Habitat Interaction Between Two Species Of Chipmunk In The Basin And Range Province Of Nevada, Christopher Lowrey, Kathleen Longshore

Western North American Naturalist

Interspecies interactions can affect how species are distributed, put constraints on habitat expansion, and reduce the fundamental niche of the affected species. Using logistic regression, we analyzed and compared 174 Tamias palmeri and 94 Tamias panamintinus within an isolated mountain range of the Basin and Range Province of southern Nevada. Tamias panamintinus was more likely to use pinyon/ponderosa/fir mixed forests than pinyon alone, compared to random sites. In the presence of T. palmeri, however, interaction analyses indicated T. panamintinus was less likely to occupy the mixed forests and more likely near large rocks on southern aspects. This species-by-habitat interaction data …

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Ecological Patterns Along Two Alpine Glacial Streams In The Fitzpatrick Wilderness, Wind River Range, Usa, C. Thompson, E. David, M. Freestone, C. T. Robinson Jul 2013

Ecological Patterns Along Two Alpine Glacial Streams In The Fitzpatrick Wilderness, Wind River Range, Usa, C. Thompson, E. David, M. Freestone, C. T. Robinson

Western North American Naturalist

Most alpine glaciers worldwide are receding rapidly, revealing new streams to be colonized by aquatic organisms. Several major questions are whether these new streams are colonized by aquatic organisms, how fast this colonizing occurs, which organisms are colonizing, and what factors constrain dispersal. We examined longitudinal patterns (over a length of 5 km) in physicochemistry, as well as periphyton and macroinvertebrate composition in 2 glacier streams (Dinwoody, Gannett) in the Wind River Range wilderness, home to the few remaining glaciers in the contiguous USA. We found that newly emerged streams near the glacial snout were inhabited by periphyton and macroinvertebrates, …

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Cheatgrass (Bromus Tectorum) Dominates Cheek Pouch Contents Of The Great Basin Pocket Mouse (Perognathus Parvus), Kristen A. Richardson, Stephen D. West, Robert A. Gitzen Jul 2013

Cheatgrass (Bromus Tectorum) Dominates Cheek Pouch Contents Of The Great Basin Pocket Mouse (Perognathus Parvus), Kristen A. Richardson, Stephen D. West, Robert A. Gitzen

Western North American Naturalist

Most of the native shrubsteppe habitat in the northern Columbia Basin of eastern Washington has been invaded by cheatgrass (Bromus tectorum) or converted to agricultural lands. Therefore, ecological patterns and dynamics on native shrubsteppe and reestablished grasslands are of high conservation interest. We analyzed the cheek pouch contents of Great Basin pocket mice (Perognathus parvus) from 48 study sites in this region to quantify seed collection by this species and to determine the influence of habitat type on cheek pouch seed contents. In all 3 habitat types—newly established Conservation Reserve Program (CRP) lands, older CRP lands, …

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Bison Selection Of Prairie Dog Colonies On Shortgrass Steppe, Jennifer G. Chipault, James K. Detling Jul 2013

Bison Selection Of Prairie Dog Colonies On Shortgrass Steppe, Jennifer G. Chipault, James K. Detling

Western North American Naturalist

American bison (Bison bison L.) preferentially use black-tailed prairie dog (Cynomys ludovicianus L.) colonies over uncolonized range in the mixed-grass prairie of North America. To assess bison use of prairie dog colonies in a different ecosystem, the shortgrass steppe, this study was conducted at the Vermejo Park Ranch, New Mexico. Driving surveys were conducted in summer 2007 to determine the number of bison on and off prairie dog colonies in 2 pastures. Prairie dogs occupied 25.5% and 48.5% of the 2 pastures surveyed. Bison of both sexes used prairie dog colonies more than expected compared to a scenario …

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Genetic Sampling Of Palmer's Chipmunks In The Spring Mountains, Nevada, Kevin S. Mckelvey, Jennifer E. Ramirez, Kristine L. Pilgrim, Samuel A. Cushman, Michael K. Schwartz Jul 2013

Genetic Sampling Of Palmer's Chipmunks In The Spring Mountains, Nevada, Kevin S. Mckelvey, Jennifer E. Ramirez, Kristine L. Pilgrim, Samuel A. Cushman, Michael K. Schwartz

Western North American Naturalist

Palmer’s chipmunk (Neotamias palmeri) is a medium-sized chipmunk whose range is limited to the higherelevation areas of the Spring Mountain Range, Nevada. A second chipmunk species, the Panamint chipmunk (Neotamias panamintinus), is more broadly distributed and lives in lower-elevation, primarily pinyon-juniper (Pinus monophylla–Juniperus osteosperma) habitat types. Panamint chipmunks are not closely related to Palmer’s, but field identification of the 2 species is unreliable. Palmer’s chipmunk is a species of concern in the state of Nevada and is listed by the International Union for Conservation of Nature (IUCN) as endangered. As such, conservation of Palmer’s …

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Greater Sage-Grouse And Natural Gas Development In Utah: Using Population Genetic Data For Conservation Efforts, Leah S. Breidinger, Karen E. Mock, Terry Allen Messmer Jul 2013

Greater Sage-Grouse And Natural Gas Development In Utah: Using Population Genetic Data For Conservation Efforts, Leah S. Breidinger, Karen E. Mock, Terry Allen Messmer

Western North American Naturalist

Population declines of Greater Sage-Grouse (Centrocercus urophasianus) throughout the western United States have been attributed to the loss, degradation, and fragmentation of sagebrush (Artemisia spp.) habitats. Increased energy development may further fragment sagebrush habitat, isolating sage-grouse populations and resulting in genetic drift, inbreeding, local extinction, or rapid divergence. We conducted a genetic survey of 3 remote sagegrouse populations in northeastern Utah to assess mitochondrial diversity relative to other portions of the species’ range. We did not detect any unusual haplotype compositions in these populations. However, haplotype composition of the Anthro Mountain and Strawberry Valley reference populations differed …

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Current Distributional Status Of Two Subspecies Of Sylvilagus Bachmani On The Baja California Peninsula, Mexico, Consuelo Lorenzo, Patricia Cortés-Calva, Gorgonio Ruiz-Campos, Sergio Ticul Álvarez-Castañeda Jul 2013

Current Distributional Status Of Two Subspecies Of Sylvilagus Bachmani On The Baja California Peninsula, Mexico, Consuelo Lorenzo, Patricia Cortés-Calva, Gorgonio Ruiz-Campos, Sergio Ticul Álvarez-Castañeda

Western North American Naturalist

We assessed the current distributions for 2 subspecies of the brush rabbit, Sylvilagus bachmani peninsularis and S. b. exiguus, on the Baja California Peninsula, Mexico. On the basis of field sampling, field notes, and voucher specimens in scientific collections, we demonstrated that (1) both subspecies have been previously recorded in mesic habitats with conditions associated with oases and streams; (2) the 2 subspecies exhibit disjunction in their distributions in the middle and southern portions of the peninsula; (3) habitats are threatened by human activities and desertification, which explains why brush rabbit populations are currently fragmented; and (4) specimens of S. …

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Low Mitochondrial Dna Sequence Variation In The Microendemic Cuatro Ciénegas Platyfish Xiphophorus Gordoni, Evan W. Carson, Hector Espinosa-Pérez, Valeria Souza Jul 2013

Low Mitochondrial Dna Sequence Variation In The Microendemic Cuatro Ciénegas Platyfish Xiphophorus Gordoni, Evan W. Carson, Hector Espinosa-Pérez, Valeria Souza

Western North American Naturalist

The desert spring ecosystem of the Cuatro Ciénegas basin, Mexico, hosts an extraordinary but increasingly imperiled assemblage of native and endemic aquatic organisms. Among the more vulnerable to extinction is the microendemic Cuatro Ciénegas platyfish Xiphophorus gordoni, which is at particular risk due to its highly restricted distribution and small population size. Given the growing demands on water resources in this arid region, we conducted a survey of mitochondrial DNA sequence variation in the cytochrome b gene to establish a baseline for long-term genetic monitoring of this endangered species. Fifty-eight specimens were collected from the 2 subpopulations known to persist, …

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Effects Of Male Size On Searching Behaviors In The Sun Dance Of Bembix, David A. Tanner, James P. Pitts Jul 2013

Effects Of Male Size On Searching Behaviors In The Sun Dance Of Bembix, David A. Tanner, James P. Pitts

Western North American Naturalist

Males of solitary wasp species are faced with the task of locating potential mates, a task made more difficult by inconspicuous females and a landscape seemingly devoid of landmarks. Males may employ a variety of strategies to locate females. In this study, we test for variation among males within the sun dance of Bembix. We show that males ofBembix americana spinolae Lepeletier behave differently within the sun dance and that these differences can be predicted by the size of the male. We show that large males spend more time at “rest” and require a greater number of male–male contacts …

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