Alan Robert Templeton
Total Page：16
File Type：pdf, Size：1020Kb
Load more
Recommended publications
-
Niche Breadth and Feeding in Tropical Grasshoppers
ar ,? ,* 4 ’ Insect Sci. Applic. Vol. 12, No. 11213, pp. 201-208, 1991 0191-9040/91 $3.00 + 0.00 Printed in Kenya. All rights reserved O 1991 ICIPE-ICIPE Science Press NICHE BREADTH AND FEEDING IN TROPICAL GRASSHOPPERS LE GALL PHILIPPE* ORSTOM, Institut Français de Recherches pour le Développement en Co-operation, _-Laboratoire d’Entomologie Bt 446, UniversitC Paris-Sud Orsay, 914105, Orsay (-./.- (Received 30 October 1990) Abstract-Consumption indices and apparent digestibility are measured for seven species of grasshoppers from Lamto (Ivory Coast), representative of different trophic specialization steps (Le Gall and Gillon, 1989). The consumption indices vary from 0.11 to 0.34 and the apparent digestibility from 30 to 65%. Specialists are not more efficient on their host plant than are generalists on convenient host plants, but some specialists fed on plants which are not convenient for generalists. Anthermus granosus and Eucoptacra spathulacauda feeding on Lippia multiflora is not convenient for a generalist like Eucoptera anguliflava. If feeding efficiency does not seem to be a real selective pressure, it can be an important step in specialization processes, when there is an adaptation to an unusable host plant for polyphagous species. Differences in the constitution of plant parts eaten by the grasshopper play an important role in the digestibility. The differences in the efficiency observed between the two specialists of Lippia are from their differences in feeding behaviour. Key Words: Grasshoppers, Orthoptera, Acrididae, Africa, plant-insects relationships, ecology, digestibility Résumé-Une Btude a été faite sur la consom’mation et la digestibilité apparente chez 7 espèces de sauterelles à Lamto (Côte d’Ivoire) représentant différents elements de spécialisation alimentaire (Le Gall et Gillon, 1989). -
Biological Evaluation
United States Department of Agriculture Forest Service March 2018 Biological Evaluation Prospect Hamby Project Tusquitee Ranger District, Nantahala National Forest Cherokee County, North Carolina For Additional Information Contact: Tusquitee Ranger District 123 Woodland Drive Murphy, North Carolina 28906 (828) 837-5152 2-1 Table of Contents 1.0 INTRODUCTION .......................................................................................................................... 2 1.1 Proposed Action ......................................................................................................................... 2 1.2 Species Considered ..................................................................................................................... 2 2.0 PROPOSED, ENDANGERED, and THREATENED SPECIES ................................................... 3 2.1 Aquatic Resources ...................................................................................................................... 3 2.2 Botanical Resources ................................................................................................................... 6 2.3 Wildlife Resources ..................................................................................................................... 8 2.4 Effects Determinations for Proposed, Endangered, and Threatened Species ........................... 14 3.0 SENSITIVE SPECIES ................................................................................................................. 14 3.1 Aquatic -
Diversity of Mariner-Like Elements in Orthoptera Разнообразие Mariner
ЭКОЛОГИЧЕСКАЯ ГЕНЕТИКА Вавиловский журнал генетики и селекции. 2019;23(8):1059-1066 Оригинальное исследование / Original article DOI 10.18699/VJ19.581 Diversity of mariner-like elements in Orthoptera K. Ustyantsev1 , M. Biryukov1, I. Sukhikh1, N.V. Shatskaya1, V. Fet2, A. Blinov1, 3, I. Konopatskaia1 1 Institute of Cytology and Genetics, SB RAS, Novosibirsk, Russia 2 Marshall University, Department of Biological Sciences, Huntington, USA 3 Institute of Molecular and Cellular Biology, SB RAS, Novosibirsk, Russia e-mail: [email protected] Mariner-like elements (MLEs) are among the most widespread DNA transposable elements in eukaryotes. Insects were the first organisms in which MLEs were identified, however the diversity of MLEs in the insect order Orthoptera has not yet been addressed. In the present study, we explore the diversity of MLEs elements in 16 species of Orthoptera be- longing to three infraorders, Acridoidea (Caelifera), Grylloidea (Ensifera), and Tettigoniidea (Ensifera) by combining data mined from computational analysis of sequenced degenerative PCR MLE amplicons and available Orthoptera genomic scaffolds. In total, 75 MLE lineages (Ortmar) were identified in all the studied genomes. Automatic phylogeny-based classification suggested that the current known variability of MLEs can be assigned to seven statistically well-supported phylogenetic clusters (I–VII), and the identified Orthoptera lineages were distributed among all of them. The majori- ty of the lineages (36 out of 75) belong to cluster I; 20 belong to cluster VI; and seven, six, four, one and one lineages belong to clusters II, IV, VII, III, and V, respectively. Two of the clusters (II and IV) were composed of a single Orthoptera MLE lineage each (Ortmar37 and Ortmar45, respectively) which were distributed in the vast majority of the studied Orthoptera genomes. -
Another Way of Being Anisogamous in Drosophila Subgenus
Proc. NatI. Acad. Sci. USA Vol. 91, pp. 10399-10402, October 1994 Evolution Another way of being anisogamous in Drosophila subgenus species: Giant sperm, one-to-one gamete ratio, and high zygote provisioning (evoludtion of sex/paternty asune/male-derived contrIbutIon/Drosophia liftorais/Drosopha hydei) CHRISTOPHE BRESSAC*t, ANNE FLEURYl, AND DANIEL LACHAISE* *Laboratoire Populations, Gen6tique et Evolution, Centre National de la Recherche Scientifique, F-91198 Gif-sur-Yvette Cedex, France; and *Laboratoire de Biologie Cellulaire 4, Unit6 Recherche Associ6e 1134, Universit6 Paris XI, F-91405 Orsay Cedex, France Communicated by Bruce Wallace, July 11, 1994 ABSSTRACT It is generally assume that sexes n animals within-ejaculate short sperm heteromorphism in the Dro- have arisen from a productivity versus provisioning conflict; sophila obscura species group (Sophophora subgenus) to males are those individuals producing gametes n ily giant sperm found solely within the Drosophila subgenus. small, in excess, and individually bereft of all paternity assur- The most extreme pairwise comparison of sperm length ance. A 1- to 2-cm sperm, 5-10 times as long as the male body, between these taxonomic groups represents a factor of might therefore appear an evolutionary paradox. As a matter growth of 300 (12). In all Drosophila species described so far of fact, species ofDrosophila of the Drosophila subgenus differ in this respect, sperm contain a short acrosome, a filiform from those of other subgenera by producing exclusively sperm haploid nucleus, and a flagellum composed of two inactive of that sort. We report counts of such giant costly sperm in mitochondrial derivatives (13, 14) flanking one axoneme Drosophila littondis and Drosophila hydei females, indicating along its overall length: the longer the sperm, the larger the that they are offered in exceedingly small amounts, tending to flagellum and hence the more mitochondrial material. -
Changes in Life History and Population Size Can Explain the Relative Neutral Diversity Levels on X and Autosomes in Extant Human Populations
Changes in life history and population size can explain the relative neutral diversity levels on X and autosomes in extant human populations Guy Amstera,1, David A. Murphya, William R. Milligana, and Guy Sellaa,b,c,1 aDepartment of Biological Sciences, Columbia University, New York, NY 10027; bDepartment of Systems Biology, Columbia University, New York, NY 10032; and cProgram for Mathematical Genomics, Columbia University, New York, NY 10032 Edited by Brian Charlesworth, University of Edinburgh, Edinburgh, United Kingdom, and approved July 7, 2020 (received for review October 22, 2019) In human populations, the relative levels of neutral diversity on generally—the effects of selection at linked sites should be stronger the X and autosomes differ markedly from each other and from on the X (ref. 18, but see ref. 3). To evaluate these effects empiri- the naïve theoretical expectation of 3/4. Here we propose an ex- cally, several studies have examined how diversity levels on the X and planation for these differences based on new theory about the autosomes vary with genetic distance from putatively selected re- effects of sex-specific life history and given pedigree-based esti- gions, for example from coding and conserved noncoding regions mates of the dependence of human mutation rates on sex and (11, 13–15, 19, 20). In most hominids, including humans, such age. We demonstrate that life history effects, particularly longer comparisons confirm the theoretical expectation that selection at generation times in males than in females, are expected to have linked loci reduces X:A diversity ratios (11, 15, 20). They further had multiple effects on human X-to-autosome (X:A) diversity ra- suggest that the effects are minimal sufficiently far from genes (11, tios, as a result of male-biased mutation rates, the equilibrium X:A 19), thereby providing an opportunity to examine the effects of ratio of effective population sizes, and the differential responses other factors shaping X:A diversity ratios in isolation by considering to changes in population size. -
Final Report 1
Sand pit for Biodiversity at Cep II quarry Researcher: Klára Řehounková Research group: Petr Bogusch, David Boukal, Milan Boukal, Lukáš Čížek, František Grycz, Petr Hesoun, Kamila Lencová, Anna Lepšová, Jan Máca, Pavel Marhoul, Klára Řehounková, Jiří Řehounek, Lenka Schmidtmayerová, Robert Tropek Březen – září 2012 Abstract We compared the effect of restoration status (technical reclamation, spontaneous succession, disturbed succession) on the communities of vascular plants and assemblages of arthropods in CEP II sand pit (T řebo ňsko region, SW part of the Czech Republic) to evaluate their biodiversity and conservation potential. We also studied the experimental restoration of psammophytic grasslands to compare the impact of two near-natural restoration methods (spontaneous and assisted succession) to establishment of target species. The sand pit comprises stages of 2 to 30 years since site abandonment with moisture gradient from wet to dry habitats. In all studied groups, i.e. vascular pants and arthropods, open spontaneously revegetated sites continuously disturbed by intensive recreation activities hosted the largest proportion of target and endangered species which occurred less in the more closed spontaneously revegetated sites and which were nearly absent in technically reclaimed sites. Out results provide clear evidence that the mosaics of spontaneously established forests habitats and open sand habitats are the most valuable stands from the conservation point of view. It has been documented that no expensive technical reclamations are needed to restore post-mining sites which can serve as secondary habitats for many endangered and declining species. The experimental restoration of rare and endangered plant communities seems to be efficient and promising method for a future large-scale restoration projects in abandoned sand pits. -
List of Insect Species Which May Be Tallgrass Prairie Specialists
Conservation Biology Research Grants Program Division of Ecological Services © Minnesota Department of Natural Resources List of Insect Species which May Be Tallgrass Prairie Specialists Final Report to the USFWS Cooperating Agencies July 1, 1996 Catherine Reed Entomology Department 219 Hodson Hall University of Minnesota St. Paul MN 55108 phone 612-624-3423 e-mail [email protected] This study was funded in part by a grant from the USFWS and Cooperating Agencies. Table of Contents Summary.................................................................................................. 2 Introduction...............................................................................................2 Methods.....................................................................................................3 Results.....................................................................................................4 Discussion and Evaluation................................................................................................26 Recommendations....................................................................................29 References..............................................................................................33 Summary Approximately 728 insect and allied species and subspecies were considered to be possible prairie specialists based on any of the following criteria: defined as prairie specialists by authorities; required prairie plant species or genera as their adult or larval food; were obligate predators, parasites -
Human Evolution
Note added by authors December 4, 2018: This study is grounded in and strongly supports Darwinian evolution, including the understanding that all life has evolved from a common biological origin over several billion years. This work follows mainstream views of human evolution. We do not propose there was a single "Adam" or "Eve". We do not propose any catastrophic events. HUMAN EVOLUTION Vol. 33 - n. 1-2 (1-30) - 2018 Stoeckle M.Y. Why should mitochondria define species? Program for the Human Environment The Rockefeller University 1230 York AVE More than a decade of DNA barcoding encompassing New York, NY 10065 about five million specimens covering 100,000 animal USA species supports the generalization that mitochondrial Email: [email protected] DNA clusters largely overlap with species as defined by domain experts. Most barcode clustering reflects synony- Thaler D.S. mous substitutions. What evolutionary mechanisms ac- Biozentrum, University of Basel count for synonymous clusters being largely coincident Klingelbergstrasse 50/70 with species? The answer depends on whether variants CH - 4056 Basel Switzerland are phenotypically neutral. To the degree that variants are Email: [email protected] selectable, purifying selection limits variation within spe- [email protected] cies and neighboring species may have distinct adaptive peaks. Phenotypically neutral variants are only subject to demographic processes—drift, lineage sorting, genetic DOI: 10.14673/HE2018121037 hitchhiking, and bottlenecks. The evolution of modern humans has been studied from several disciplines with detail unique among animal species. Mitochondrial bar- codes provide a commensurable way to compare modern humans to other animal species. Barcode variation in the modern human population is quantitatively similar to that within other animal species. -
Ecological Factors and Drosophila Speciation
ECOLOGICAL FACTORS AND DROSOPHILA SPECIATION WARREN P. SPENCER, College of Wooster INTRODUCTION In 1927 there appeared H. J. Muller's announcement of the artificial transmutation of the gene. This discovery was received with enthusiasm throughout the scientific world. Ever since the days of Darwin biological alchemists had tried in vain to induce those seemingly rare alterations in genes which were coming to be known as "the building stones of evolution." In the same year Charles Elton published a short book on animal ecology. It was received with little acclaim. That is not sur- prising. To the modern biologist ecology has seemed a bit out-moded, rather beneath the dignity of a laboratory scientist. Without detracting from the importance of Muller's discovery, in the light of the develop- ments of the past 13 years we venture to say that Elton conies nearer to providing the key to the process of evolution than does radiation genetics. Here is a quotation from Elton's chapter on ecology and evolution. '' Many animals periodically undergo rapid increase with practically no checks at all. In fact the struggle for existence sometimes tends to disappear almost entirely. During the expansion in numbers from a minimum, almost every animal survives, or at any rate a very high proportion of them do so, and an immeasurably larger number survives than when the population remains constant. If therefore a heritable variation were to occur in the small nucleus of animals left at a min- imum of numbers, it would spread very quickly and automatically, so that a very large porportion of numbers of individuals would possess it when the species had regained its normal numbers. -
Diptera: Syrphidae), Based on Integrative Taxonomy and Aegean Palaeogeography
Contributions to Zoology, 87 (4) 197-225 (2018) Disentangling a cryptic species complex and defining new species within the Eumerus minotaurus group (Diptera: Syrphidae), based on integrative taxonomy and Aegean palaeogeography Antonia Chroni1,4,5, Ana Grković2, Jelena Ačanski3, Ante Vujić2, Snežana Radenković2, Nevena Veličković2, Mihajla Djan2, Theodora Petanidou1 1 University of the Aegean, Department of Geography, University Hill, 81100, Mytilene, Greece 2 University of Novi Sad, Faculty of Sciences, Department of Biology and Ecology, Trg Dositeja Obradovića 2, 21000, Novi Sad, Serbia 3 Laboratory for Biosystems Research, BioSense Institute – Research Institute for Information Technologies in Biosystems, University of Novi Sad, Dr. Zorana Đinđića 1, 21000, Novi Sad, Serbia 4 Institute for Genomics and Evolutionary Medicine; Department of Biology, Temple University, Philadelphia, PA 19122, USA 5 E-mail: [email protected] Keywords: Aegean, DNA sequences, hoverflies, mid- Discussion ............................................................................. 211 Aegean Trench, wing geometric morphometry Taxonomic and molecular implications ...........................212 Mitochondrial dating, biogeographic history and divergence time estimates ................................................213 Abstract Acknowledgments .................................................................215 References .............................................................................215 This study provides an overview of the Eumerus minotaurus -
Thermal Sensitivity of the Spiroplasma-Drosophila Hydei Protective Symbiosis: the Best of 2 Climes, the Worst of Climes
bioRxiv preprint doi: https://doi.org/10.1101/2020.04.30.070938; this version posted May 2, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. 1 Thermal sensitivity of the Spiroplasma-Drosophila hydei protective symbiosis: The best of 2 climes, the worst of climes. 3 4 Chris Corbin, Jordan E. Jones, Ewa Chrostek, Andy Fenton & Gregory D. D. Hurst* 5 6 Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Crown 7 Street, Liverpool L69 7ZB, UK 8 9 * For correspondence: [email protected] 10 11 Short title: Thermal sensitivity of a protective symbiosis 12 13 1 bioRxiv preprint doi: https://doi.org/10.1101/2020.04.30.070938; this version posted May 2, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. 14 Abstract 15 16 The outcome of natural enemy attack in insects has commonly been found to be influenced 17 by the presence of protective symbionts in the host. The degree to which protection 18 functions in natural populations, however, will depend on the robustness of the phenotype 19 to variation in the abiotic environment. We studied the impact of a key environmental 20 parameter – temperature – on the efficacy of the protective effect of the symbiont 21 Spiroplasma on its host Drosophila hydei, against attack by the parasitoid wasp Leptopilina 22 heterotoma. -
Sociobiology and Law
Sociobiology and Law Allan Ardill LLB. (Hons), B.Bus. (Accounting), B.Bus. (HRM), A.Dip. Bus. (IR) A dissertation in fulfilment of the requirements for the degree of Doctor of Philosophy Griffith Law School Griffith University Gold Coast, Queensland, Australia. February 2008 2 Abstract The place of humans in nature and the nature of humans eludes us and yet there are those certain these issues can be reduced to biological explanations. Similarly, there are those rejecting the biological determinist hypothesis in favour of the equally unsubstantiated cultural construction hypothesis. This thesis draws on neo-Marxism and feminist intersectional post-positivist standpoint theory to posit biological and cultural determinism as privileged and flawed knowledge produced within relations of asymmetrical power. Instead “social construction” is preferred viewing knowledge of both nature and culture as partial and constructed within an historical, socioeconomic and political context according to asymmetrical power. Social constructionists prefer to question the role of power in the production of knowledge rather than asking questions about the place of humans in nature and the nature of humans; and trying to answer those questions through methods imbued with western, colonial, patriarchal, homophobic, and positivist ideals. As a starting point the postmodern view that knowledge is incomplete and has no ultimate authority is accepted. However, this thesis departs from postmodernism on the premise that knowledge is not all relative and can be critiqued by drawing on neo- Marxist and feminist intersectional post-positivist standpoint theory. Standpoint theory presumes a knowledge power nexus and contends accountable, ethical and responsible knowledge can be produced provided an “upwards perspective” is applied commencing with the standpoint of the most marginalised group within a given context.