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2013

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Articles 271 - 300 of 525

Full-Text Articles in Ecology and Evolutionary Biology

The First Molecular Phylogeny Of Buthidae (Scorpiones), Victor Fet, Benjamin Gantenbein, Alexander Gromov, Graeme Lowe, Wilson R. Lourenço Mar 2013

The First Molecular Phylogeny Of Buthidae (Scorpiones), Victor Fet, Benjamin Gantenbein, Alexander Gromov, Graeme Lowe, Wilson R. Lourenço

Euscorpius

The first partial phylogeny of family Buthidae (17 genera) is presented, based on molecular data (16S rRNA mitochondrial DNA). The strong support for a monophyletic Old World group of 13 genera (mainly Palearctic desert forms) is demonstrated, while representative genera from Madagascar (Grosphus) and Southeast Asia (Lychas) group outside, as well as New World genera Centruroides and Rhopalurus. A very strong support is observed for the first time for three groups of Old World genera: (a) Compsobuthus, Mesobuthus, Liobuthus, Kraepelinia; (b) Hottentotta, Buthacus; (c) Orthochirus, Anomalobuthus. Phylogenetic …

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Morphology Analysis Supports Presence Of More Than One Species In The “Euscorpius Carpathicus” Complex (Scorpiones: Euscorpiidae), Victor Fet, Michael E. Soleglad Mar 2013

Morphology Analysis Supports Presence Of More Than One Species In The “Euscorpius Carpathicus” Complex (Scorpiones: Euscorpiidae), Victor Fet, Michael E. Soleglad

Euscorpius

We investigate a number of scorpion populations from southern and central Europe, commonly classified under a “catch-all” name of Euscorpius carpathicus (L., 1767). This species includes a high number of described subspecies but its composition is not resolved. The detailed morphology analysis in the present paper includes a number of new characters, in particular individually mapped external patellar accessory trichobothria. It suggests that several clearly separated lineages are present. E. carpathicus (L.) is restricted here to geographically marginal populations from Romania (terra typica), which exhibit loss of one trichobothrium in the patellar series em (= 3). Another lineage (Austria, Croatia, …

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Two New Andean Species Of Brachistosternus Pocock (Scorpiones: Bothriuridae), Jose A. Ochoa, Louis E. Acosta Mar 2013

Two New Andean Species Of Brachistosternus Pocock (Scorpiones: Bothriuridae), Jose A. Ochoa, Louis E. Acosta

Euscorpius

Two new Andean species of the genus Brachistosternus Pocock from southern Peru and northern Chile are described: B. titicaca sp. n. from the Titicaca basin (Departamento Puno, Peru), at 3850-3900 m, and B. quiscapata sp. n. from Departamento Tacna (Peru) and Provincia Arica (Chile), at 3100-3400 m. Both species belong to the subgenus Brachistosternus (Leptosternus) Maury. They are related to the Argentinean species B. (L.) intermedius Lönnberg and B.(L.) montanus Roig Alsina. Comparisons between these four species are provided, including a combination of characters: length/width ratio of metasomal segment V, number of setae of metasomal segment V and tarsus III, …

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Etudes On Iurids, V. Further Revision Of Iurus Thorell, 1876 (Scorpiones: Iuridae), With A Description Of A New Genus And Two New Species, Michael E. Soleglad, Victor Fet, František Kovařík, Ersen Aydın Yağmur Mar 2013

Etudes On Iurids, V. Further Revision Of Iurus Thorell, 1876 (Scorpiones: Iuridae), With A Description Of A New Genus And Two New Species, Michael E. Soleglad, Victor Fet, František Kovařík, Ersen Aydın Yağmur

Euscorpius

Iurus populations from the Aegean area are studied, including the Greek islands of Crete, Karpathos, Kythira, Rhodes, and Samos. A new genus, Protoiurus gen. nov., and two new species, Protoiurus rhodiensis sp. nov. and P. stathiae sp. nov., are described. The two genera, Iurus and Protoiurus, are diagnosed by their hemispermatophore structure; a cladistic analysis based on this structure is presented. Genus Iurus Thorell, 1876 includes three species: I. dekanum, I. dufoureius, and I. kinzelbachi; genus Protoiurus includes five species: P. asiaticus comb. nov., P. kadleci comb. nov., P. kraepelini comb. nov., P. rhodiensis sp. nov., and P. …

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Euscorpiops Neradi Sp. N. From Thailand (Scorpiones: Euscorpiidae: Scorpiopinae), František Kovařík, Jana Plíšková, František Šťáhlavský Mar 2013

Euscorpiops Neradi Sp. N. From Thailand (Scorpiones: Euscorpiidae: Scorpiopinae), František Kovařík, Jana Plíšková, František Šťáhlavský

Euscorpius

Euscorpiops neradi sp. n. from Thailand is described and compared with other species of the genus Euscorpiops Vachon, 1980. It is the smallest species of the genus, with total length about 25 mm in both sexes. In E. neradi sp. n. external trichobothria on the patella number 16 (5 eb, 2 esb, 2 em, 3 est, 4 et) and ventral trichobothria on the patella number 6. Pedipalp fingers are flexed in males and straight in females.

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Alloscorpiops Citadelle Sp. N. From Thailand (Scorpiones: Euscorpiidae: Scorpiopinae)., František Kovařík Mar 2013

Alloscorpiops Citadelle Sp. N. From Thailand (Scorpiones: Euscorpiidae: Scorpiopinae)., František Kovařík

Euscorpius

Alloscorpiops citadelle sp. n. from Thailand is described and compared with A. anthracinus (Simon, 1887). A. citadelle sp. n. is characterized mainly by a higher number of trichobothria on the patella, which has 29–34 external (23–24 in A. anthracinus) and 19–21 ventral (15–19 in A. anthracinus) trichobothria.

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Evolution Of Scorpion Orthobothriotaxy: A Cladistic Approach, Michael E. Soleglad, Victor Fet Mar 2013

Evolution Of Scorpion Orthobothriotaxy: A Cladistic Approach, Michael E. Soleglad, Victor Fet

Euscorpius

This study presents a cladistic analysis of the derivation of orthobothriotaxic patterns in scorpions. Included in this analysis are the original three orthobothriotaxic patterns defined by Vachon (1972, 1974), the pattern of the unique scorpion Pseudochactas ovchinnikovi Gromov, 1998, and two trichobothrial patterns of fossil scorpions, the Upper Carboniferous palaeopisthacanthids and the Lower Cretaceous archaeobuthids. An overview of all fossil scorpion material where trichobothria are reported is presented in detail. The approach used in this analysis is to model the existence of an individual trichobothrium, adopting the ‘absence of’, ‘petite size’ and ‘full size’ as incremental stages of a trichobothrium’s …

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Contributions To Scorpion Systematics. I. On Recent Changes In High-Level Taxonomy, Victor Fet, Michael E. Soleglad Mar 2013

Contributions To Scorpion Systematics. I. On Recent Changes In High-Level Taxonomy, Victor Fet, Michael E. Soleglad

Euscorpius

Prendini & Wheeler (2005) criticized the methods of phylogenetic analyses by Soleglad, Fet, and their coauthors, and executed an unprecedented taxonomic action: without analyzing any of these taxa, they performed a wholesale synonymization of four parvorders, eight superfamilies, one family, 11 subfamilies, eight tribes, two subtribes, and three genera (in total, 37 taxa) of scorpions, and made other taxonomic changes. No alternative new classification has been proposed (instead, they revert to a previous classification), and no results of original work on this subject by Prendini & Wheeler (2005) have been presented. Here, we reverse all taxonomic changes performed by Prendini …

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Melanin Concentration Gradients In Modern And Fossil Feathers, Daniel J. Field, Liliana D’Alba, Jakob Vinther, Samuel M. Webb, William Gearty, Matthew D. Shawkey Mar 2013

Melanin Concentration Gradients In Modern And Fossil Feathers, Daniel J. Field, Liliana D’Alba, Jakob Vinther, Samuel M. Webb, William Gearty, Matthew D. Shawkey

School of Biological Sciences: Faculty Publications

In birds and feathered non-avian dinosaurs, within-feather pigmentation patterns range from discrete spots and stripes to more subtle patterns, but the latter remain largely unstudied. A ,55 million year old fossil contour feather with a dark distal tip grading into a lighter base was recovered from the Fur Formation in Denmark. SEM and synchrotron-based trace metal mapping confirmed that this gradient was caused by differential concentration of melanin. To assess the potential ecological and phylogenetic prevalence of this pattern, we evaluated 321 modern samples from 18 orders within Aves. We observed that the pattern was found most frequently in distantly …

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Etudes On Iurids, Ii. Revision Of Genus Calchas Birula, 1899, With The Description Of Two New Species (Scorpiones: Iuridae), Victor Fet, Michael E. Soleglad, František Kovařík Mar 2013

Etudes On Iurids, Ii. Revision Of Genus Calchas Birula, 1899, With The Description Of Two New Species (Scorpiones: Iuridae), Victor Fet, Michael E. Soleglad, František Kovařík

Euscorpius

The relict, phylogenetically important scorpion genus Calchas Birula, 1899 (Iuridae) remained monotypic since its description. Its sole species, Calchas nordmanni Birula, 1899, was known only from northeastern Turkey until Kinzelbach (1980) published first records from southern and southeastern Turkey. A few more localities have been reported from Turkey; the species was also found on two Greek islands, Samos and Megisti. We analyzed significant material (63 specimens, including a previously unpublished large series from Naturhistorisches Museum Wien), and concluded that three distinct, disjunct species exist rather than one widespread species as previously thought. Two new species are described: Calchas birulai sp. …

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Ecological Niche Modeling Of Two Scorpion Species Mesobuthus Eupeus (C. L. Koch, 1839) And M. Phillipsii (Pocock, 1889) From The Iranian Plateau And Zagros Region (Arachnida: Scorpiones), Omid Mirshamsi Mar 2013

Ecological Niche Modeling Of Two Scorpion Species Mesobuthus Eupeus (C. L. Koch, 1839) And M. Phillipsii (Pocock, 1889) From The Iranian Plateau And Zagros Region (Arachnida: Scorpiones), Omid Mirshamsi

Euscorpius

Ecological niche modeling has allowed several advances in the process of species delimitation. In the present study, I used this method to evaluate the climatic divergence between two scorpion species, Mesobuthus eupeus and M. phillipsii. The ecological niche models (ENMs) were created based on presence-only data with the maximum entropy method. The created models, results of spatial analysis (PCA and Hotelling discriminant), and an identity test suggested that the divergence between these two species is associated with significant divergence in their ecological niches. The results of this study provide additional support for the taxonomic validity the studied species.

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A New Species Of Tityus C. L. Koch, 1836 (Scorpiones: Buthidae) From Dominican Amber, Wilson R. Lourenço Mar 2013

A New Species Of Tityus C. L. Koch, 1836 (Scorpiones: Buthidae) From Dominican Amber, Wilson R. Lourenço

Euscorpius

Tityus azari sp. n., a new species of fossil scorpion belonging to the genus Tityus C. L. Koch, 1836 is described based on a specimen in amber from the Dominican Republic. Although the new species can be associated with the extant fauna of the Neotropical region, it presents some particular morphological features such as the presence of sharp denticles on the edge of pedipalp fingers. Due to the incompleteness of the specimen it cannot be assigned to any precise extant subgenera. Once again, this discovery attests to a considerable degree of diversity in the Dominican amber-producing forests.

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The Cretaceous Scorpion Genus, Archaeobuthus, Revisited (Scorpiones: Archaeobuthidae), Chris Baptista, Jorge A. Santiago-Blay, Victor Fet, Michael E. Soleglad Mar 2013

The Cretaceous Scorpion Genus, Archaeobuthus, Revisited (Scorpiones: Archaeobuthidae), Chris Baptista, Jorge A. Santiago-Blay, Victor Fet, Michael E. Soleglad

Euscorpius

No abstract provided.

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Effects Of Increased Nitrogen Deposition On The Dominance Of Hedera Helix In The Pacific Northwest, Bianca Christine Dolan Mar 2013

Effects Of Increased Nitrogen Deposition On The Dominance Of Hedera Helix In The Pacific Northwest, Bianca Christine Dolan

Dissertations and Theses

Increased nitrogen deposition has been shown to promote the dominance of invasive species, and nitrogen deposition rates have steadily increased in most of the Western United States in recent years due to population increases. The purpose of this study was to determine if increased rates of nitrogen deposition are contributing to the success of Hedera helix in the Pacific Northwest. Plots were established in Lesser Park in Portland, Oregon and received monthly treatments of ammonium nitrate for one year. Growth, measured as change in percent cover, was compared between treated and untreated plots for both H. helix and native species. …

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The Scorpions Of Hainan Island, China (Arachnida: Scorpiones), Zhi-Yong Di, Zhi-Jian Cao, Ying-Liang Wu, Lin Zhu, Hui Liu, Wen-Xin Li Mar 2013

The Scorpions Of Hainan Island, China (Arachnida: Scorpiones), Zhi-Yong Di, Zhi-Jian Cao, Ying-Liang Wu, Lin Zhu, Hui Liu, Wen-Xin Li

Euscorpius

The redescriptions and illustrations of three species, Isometrus (Isometrus) maculatus (DeGeer, 1778), Lychas mucronatus (Fabricius, 1798) (Buthidae), and Liocheles australasiae (Fabricius, 1775) (Hemiscorpiidae) from Hainan Island, China are presented. Distribution data and updated key of Hainan scorpions are provided.

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Review Of The Subgenus Pandinurus Fet, 1997 With Descriptions Of Three New Species (Scorpiones, Scorpionidae, Pandinus)., František Kovařík Mar 2013

Review Of The Subgenus Pandinurus Fet, 1997 With Descriptions Of Three New Species (Scorpiones, Scorpionidae, Pandinus)., František Kovařík

Euscorpius

Pandinus (Pandinurus) awashensis sp. n. from Ethiopia, P. (P.) somalilandus sp. n. from Somaliland, and P. (P.) lowei sp. n. from Democratic Republic of Congo are described and compared with other species of the subgenus. P. (P.) sudanicus Hirst, 1911 stat. n. previously considered a synonym of P. (P.) magrettii Borelli, 1901 is recognized as a valid species. New data on taxonomic characters and distribution of the subgenus Pandinurus are presented. Also presented are a map of distribution, photos of the localities and a key to species using hitherto unpublished characters of the tarsomere spination formula and sexual …

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Evaluating The Effects Of Road Crossing Structures On Stream-Associated Amphibians In The Wilson River Watershed, Tillamook State Forest, Oregon, Sara Erin Twitchell Mar 2013

Evaluating The Effects Of Road Crossing Structures On Stream-Associated Amphibians In The Wilson River Watershed, Tillamook State Forest, Oregon, Sara Erin Twitchell

Dissertations and Theses

As replacement and removal of undersized culverts gains momentum as an effective technique for restoring natural stream flows and removing fish passage barriers, it is important to evaluate the benefits of these efforts on the in-stream and adjacent riparian habitat for other species of potential concern. This study compares stream-associated amphibian (SAA) occurrence in streams adjacent to different road crossing structures on unpaved forest roads in the Wilson River watershed located within the Tillamook State Forest, Oregon. Surveys were conducted at road crossing structures for three taxa of SAA; Pacific giant salamander (Dicamptodon tenebrosus), coastal tailed frog (Ascaphus truei), and …

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The Emerald Ash Borer, Emily Bryant Mar 2013

The Emerald Ash Borer, Emily Bryant

The Transdisciplinary STEAM+ Journal

An Emerald Ash Borer made from recycled natural materials to create sustainable art.

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A Distributed Intelligence Approach To Multidisciplinarity: Encouraging Divergent Thinking In Complex Science Issues In Society., Jarod Kawasaki, Dai Toyofuku Mar 2013

A Distributed Intelligence Approach To Multidisciplinarity: Encouraging Divergent Thinking In Complex Science Issues In Society., Jarod Kawasaki, Dai Toyofuku

The Transdisciplinary STEAM+ Journal

The scientific issues that face society today are increasingly complex, open-ended and tentative (Sadler, 2004). Finding solutions to these issues, not only requires an understanding of the science, but also, concurrently dealing with political, social, and economic dimensions that exist (Hodson, 2003). For example, 40 years after the first congressional hearing on climate change held by Al Gore in 1976, the 2012 Intergovernmental Panel on Climate Change (IPCC) report states that climate change is still getting worse, despite efforts by governments, businesses, social actors such as Non-Government Organizations, and scientists. With the top minds in the world, across all disciplines, …

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Improving Codon Evolution Models Using Complex Mutation Models, Preston Hewgley Mar 2013

Improving Codon Evolution Models Using Complex Mutation Models, Preston Hewgley

Pursuit - The Journal of Undergraduate Research at The University of Tennessee

This paper discusses an improvement in a Stochastic Evolutionary Model of Protein Production Rate (SEMPPR) by revising the method by which it models mutation. SEMPPR previously assumed unbiased mutation, an assumption whose inaccuracy is made clear by observed codon counts of low-expression genes, where mutation determines equilibrium state. This paper presents a new, more complex model generalized on a per-codon basis and calculated from observed codon frequencies using a maximum likelihood framework. Results obtained from SEMPPR using the codon specific mutation model proved more accurate in predicting a protein’s production rate, reaffirming that complex mechanisms govern codon mutation rates.

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Persons As Plants: Ecopsychology And The Return To The Dream Of Nature, Monica Gagliano Mar 2013

Persons As Plants: Ecopsychology And The Return To The Dream Of Nature, Monica Gagliano

Landscapes: the Journal of the International Centre for Landscape and Language

Abstract. In this article, I examine human-plant perceptions and interactions in terms of developing a new perspective on the perception and the actions of people towards plants. By combining my scientific understanding of the biological world and my own experiences working with plant shamans, storytellers and mystics from around the world, I engage with the idea that the hierarchical structure by which Western science defines the variety of life forms as ‘primitive’ or ‘more evolved’ is at the root of the current environmental crisis and I argue that the solution to it rests in a change of this very perspective.

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Reproductive Isolation In The Elegans-Group Of Caenorhabditis, Scott Everet Baird, Sara Rose Seibert Mar 2013

Reproductive Isolation In The Elegans-Group Of Caenorhabditis, Scott Everet Baird, Sara Rose Seibert

Biological Sciences Faculty Publications

Reproductive isolation is the basis of the Biological Species Definition and can be a driving force of speciation. Theoretical studies have provided models of how reproductive isolation can arise within individual species. Genetic tests of these models are limited to populations in which reproductive isolation is present but not complete. Here, reproductive isolation in the Elgans-Group of the nematode genus Caenorhabditis is reviewed. Pre-mating barriers, assortative fertilization and post-zygotic barriers all have been observed in this clade. In some combinations of species, fertile F1 hybrids can be obtained. Therefore, the Elegans-Group of Caenorhabditis is poised to become an important experimental …

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Ecological Studies Of Wolves On Isle Royale, 2012-2013, John A. Vucetich, Rolf O. Peterson Mar 2013

Ecological Studies Of Wolves On Isle Royale, 2012-2013, John A. Vucetich, Rolf O. Peterson

Ecological Studies of Wolves on Isle Royale

Annual Report 2012-2013

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Lter Network Data Availability Correspondence, Emery Boose Mar 2013

Lter Network Data Availability Correspondence, Emery Boose

Long Term Ecological Research Network

An email from Emery Boose regarding the tracking downloads from PASTA that was discussed in the EB meeting.

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A Multispecies Avian Abundance Analysis In Riparian And Oak Woodland Habitats On The California Central Coast, Jacy Hyde Mar 2013

A Multispecies Avian Abundance Analysis In Riparian And Oak Woodland Habitats On The California Central Coast, Jacy Hyde

Biological Sciences

I investigated the abundance and diversity of riparian and oak woodland birds in a section of the Los Padres National Forest in Coastal Central California. Point counts were conducted in Oak Woodland and Riparian habitats during the summer of 2012. Point counts were replicated in time (2x) and space (25 replicates). The data were analyzed using Program Distance to correct for differing detection probabilities between species and habitat types. The two habitat types showed no significant difference in species richness. For most species, there was no difference in density between riparian and oak woodland habitats. However, the two species with …

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A Comparison Of Relative Ear Length Between Two Neighboring Populations Of Peromyscus Maniculatus, Joshua S. Willems Mar 2013

A Comparison Of Relative Ear Length Between Two Neighboring Populations Of Peromyscus Maniculatus, Joshua S. Willems

Biological Sciences

This study attempts to determine if a significant difference in relative ear length exists between two neighboring populations of Peromyscus maniculatus on the central coast of California. Data was collected from individuals trapped at two plots in the Guadalupe-Nipomo Dunes National Wildlife Refuge and two plots near Black Lake, under the supervision of Francis X. Villablanca, Ph. D. of California Polytechnic State University, San Luis Obispo. A total of 98 individuals were captured over the course of three nights of trapping. A regression analysis was performed comparing the ear lengths of each population relative to body size. The analysis of …

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American Burying Beetle (Nicrophorus Americanus): Species Conservation Assessment, Melissa J. Panella Mar 2013

American Burying Beetle (Nicrophorus Americanus): Species Conservation Assessment, Melissa J. Panella

Nebraska Game and Parks Commission: Publications

The primary goal in development of at-risk species conservation assessments is to compile biological and ecological information that may assist conservation practitioners in making decisions regarding the conservation of species of interest. The Nebraska Natural Legacy Project recognizes the American Burying Beetle (Nicrophorus americanus) as a Tier I at-risk species of high conservation priority. Indeed, the American Burying Beetle (ABB) is a species of conservation need throughout its range. Here, I provide some general management recommendations regarding ABB; however, conservation practitioners will need to use professional judgment for specific management decisions based on objectives, location, and site-specific conditions. This resource …

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A Study Of Sharing And Reciprocity In Grey Parrots (Psittacus Erithacus), Franck Péron, Maria John, Stephanie Sapowicz, Dalila Bovet, Irene M. Pepperberg Mar 2013

A Study Of Sharing And Reciprocity In Grey Parrots (Psittacus Erithacus), Franck Péron, Maria John, Stephanie Sapowicz, Dalila Bovet, Irene M. Pepperberg

Sentience Collection

Demonstrations of nonhuman ability to share resources and reciprocate such sharing seem contingent upon the experimental paradigm used (note Horner et al. in PNAS 108:13847–13851, 2011). Here, such behaviour in Grey parrots (Psittacus erithacus) was tested in two experiments, both designed to avoid possible issues involving apparatus complexity, visible reward options, and physical competition and/or limited communication between subjects. In both studies, two birds, working in dyads, took turns in choosing one of four different coloured cups with differing outcomes: empty (null, nonrewarding), selfish (keeping reward for oneself), share (sharing a divisible reward), or giving (donating reward to other). In …

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Parasitoid Infestation Changes Female Mating Preferences, Oliver M. Beckers, William E. Wagner Mar 2013

Parasitoid Infestation Changes Female Mating Preferences, Oliver M. Beckers, William E. Wagner

School of Biological Sciences: Faculty Publications

Females often adjust their mating preference to environmental and social conditions. This plasticity of preference can be adaptive for females and can have important consequences for the evolution of male traits. While predation and parasitism are widespread, their effects on female preferences have rarely been investigated. Females of the cricket Gryllus lineaticeps are parasitized by the parasitoid fly Ormia ochracea. Infestation with fly larvae substantially reduces female life span and thus reproductive opportunities of the cricket. Both female G. lineaticeps and flies orient to male song and both prefer male songs with faster chirp rates to songs with slower chirp …

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Loggerhead Shrike (Lanius Ludovicianus): Species Conservation Assessment, Melissa J. Panella Mar 2013

Loggerhead Shrike (Lanius Ludovicianus): Species Conservation Assessment, Melissa J. Panella

Nebraska Game and Parks Commission: Publications

The primary goal in the development of at-risk species conservation assessments is to compile biological and ecological information that may assist conservation practitioners in making decisions regarding the conservation of species of interest. The Nebraska Natural Legacy Project recognizes the Loggerhead Shrike (Lanius ludovicianus) as a Tier I at-risk species. Here, I provide some general management recommendations regarding Loggerhead Shrikes. However, conservation practitioners will need to use professional judgment for specific management decisions based on objectives, location, and site-specific conditions. This resource provides available knowledge of Loggerhead Shrikes that may aid in the decision-making process or in identifying research needs …

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