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https://www.readbyqxmd.com/read/28328931/x-ray-microtomography-for-ant-taxonomy-an-exploration-and-case-study-with-two-new-terataner-hymenoptera-formicidae-myrmicinae-species-from-madagascar
#1
Francisco Hita Garcia, Georg Fischer, Cong Liu, Tracy L Audisio, Gary D Alpert, Brian L Fisher, Evan P Economo
We explore the potential of x-ray micro computed tomography (μCT) for the field of ant taxonomy by using it to enhance the descriptions of two remarkable new species of the ant genus Terataner: T. balrog sp. n. and T. nymeria sp. n.. We provide an illustrated worker-based species identification key for all species found on Madagascar, as well as detailed taxonomic descriptions, which include diagnoses, discussions, measurements, natural history data, high-quality montage images and distribution maps for both new species...
2017: PloS One
https://www.readbyqxmd.com/read/28325830/into-africa-molecular-phylogenetics-and-historical-biogeography-of-sub-saharan-african-woodferns-dryopteris
#2
Emily B Sessa, Aino Juslén, Henry Väre, Sally M Chambers
PREMISE OF THE STUDY: Our goal was to infer the phylogenetic relationships and historical biogeography of the genus Dryopteris with a focus on taxa in sub-Saharan Africa and neighboring islands. In general, little is known about the relationships between African fern species and their congeners in other geographic regions, and our aim was to determine whether the sub-Saharan African species of Dryopteris are monophyletic and evolved within Africa or arrived there via repeated dispersals into Africa from other regions...
March 21, 2017: American Journal of Botany
https://www.readbyqxmd.com/read/28314947/seasonal-adaptations-in-energy-budgeting-in-the-primate-lepilemur-leucopus
#3
Janina Bethge, Bianca Wist, Eleanor Stalenberg, Kathrin Dausmann
The spiny forest of South Madagascar is one of the driest and most unpredictable habitats in Africa. The small-bodied, nocturnal primate Lepilemur leucopus lives in this harsh habitat with high diurnal and seasonal changes in ambient temperature. In this study, we investigated seasonal adaptions in energy budgeting of L. leucopus, which allow it to live under these conditions by measuring resting metabolic rate using open-flow respirometry. No signs of heterothermy were detected, and resting metabolic rate was significantly lower in the warmer wet season than in the colder dry season...
March 17, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28280597/testing-the-adaptive-radiation-hypothesis-for-the-lemurs-of-madagascar
#4
James P Herrera
Lemurs, the diverse, endemic primates of Madagascar, are thought to represent a classic example of adaptive radiation. Based on the most complete phylogeny of living and extinct lemurs yet assembled, I tested predictions of adaptive radiation theory by estimating rates of speciation, extinction and adaptive phenotypic evolution. As predicted, lemur speciation rate exceeded that of their sister clade by nearly twofold, indicating the diversification dynamics of lemurs and mainland relatives may have been decoupled...
January 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28279810/madagascar-sheds-new-light-on-the-molecular-systematics-and-biogeography-of-grammitid-ferns-new-unexpected-lineages-and-numerous-long-distance-dispersal-events
#5
Lucie Bauret, Myriam Gaudeul, Michael A Sundue, Barbara S Parris, Tom A Ranker, France Rakotondrainibe, Sabine Hennequin, Jaona Ranaivo, Marc-André Selosse, Germinal Rouhan
Based on a worldwide phylogenetic framework filling the taxonomic gap of Madagascar and surrounding islands of the Western Indian Ocean (WIO), we revisited the systematics of grammitid fern species (Polypodiaceae). We also investigated the biogeographic origin of the extant diversity in Madagascar and estimated the relative influence of vicariance, long-distance dispersals (LDD) and in situ diversification. Phylogenetic inferences were based on five plastid DNA regions (atpB, rbcL, rps4-trnS, trnG-trnR, trnL-trnF) and the most comprehensive taxonomic sampling ever assembled (224 species belonging to 31 out of 33 recognized grammitids genera)...
March 6, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28279184/the-most-used-medicinal-plants-by-communities-in-mahaboboka-amboronabo-mikoboka-southwestern-madagascar
#6
Tabita N Randrianarivony, Aro Vonjy Ramarosandratana, Tefy H Andriamihajarivo, Fortunat Rakotoarivony, Vololoniaina H Jeannoda, Armand Randrianasolo, Rainer W Bussmann
BACKGROUND: This paper reports a study undertaken in three remote communities (Mahaboboka, Amboronabo, Mikoboka), located in Sakaraha, Southwestern Madagascar. Not only villages are far away from sanitary infrastructures and doctors but drugs and consulting fees are unaffordable to villagers. They rely essentially on natural resources for health care as for most of rural areas in Madagascar. This paper aims to document medicinal plants used by communities in Sakaraha and to present the most important plant species used in traditional medicine...
March 9, 2017: Journal of Ethnobiology and Ethnomedicine
https://www.readbyqxmd.com/read/28274947/evolution-of-woody-life-form-on-tropical-mountains-in-the-tribe-spermacoceae-rubiaceae
#7
Suman Neupane, Paul O Lewis, Steven Dessein, Hunter Shanks, Sushil Paudyal, Frederic Lens
PREMISE OF THE STUDY: Spermacoceae are mainly an herbaceous group in the Rubiaceae. However, a few lineages are woody and are found in a diverse range of habitat types. Three of the largest woody lineages (Arcytophyllum, Hedyotis, and Kadua) are characterized by their distribution in the moist tropical mountains and have disjunct distribution patterns with respect to their closest relatives. In this study, we explore the cases of derived woodiness in these three lineages and their diversification dynamics in the tropical mountains of Asia, the Pacific, and the Americas...
March 8, 2017: American Journal of Botany
https://www.readbyqxmd.com/read/28267183/isolation-and-structure-elucidation-of-natural-products-of-three-soft-corals-and-a-sponge-from-the-coast-of-madagascar
#8
Marie Pascaline Rahelivao, Tilo Lübken, Margit Gruner, Olga Kataeva, Rahanira Ralambondrahety, Hanta Andriamanantoanina, Marek P Checinski, Ingmar Bauer, Hans-Joachim Knölker
We investigated the three soft corals Sarcophyton stellatum, Capnella fungiformis and Lobophytum crassum and the sponge Pseudoceratina arabica, which have been collected at the coast of Madagascar. In addition to previously known marine natural products, S. stellatum provided the new (+)-enantiomer of the cembranoid (1E,3E,11E)-7,8-epoxycembra-1,3,11,15-tetraene (2). Capnella fungiformis afforded three new natural products, ethyl 5-[(1E,5Z)-2,6-dimethylocta-1,5,7-trienyl]furan-3-carboxylate (6), ethyl 5-[(1E,5E)-2,6-dimethylocta-1,5,7-trienyl]furan-3-carboxylate (7) and the diepoxyguaiane sesquiterpene oxyfungiformin (9a)...
March 7, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28264253/taxonomic-revision-of-the-malagasy-i-camponotus-i-i-grandidieri-i-and-i-niveosetosus-i-species-groups-hymenoptera-formicidae-using-qualitative-and-quantitative-morphology
#9
Jean Claude Rakotonirina, Sándor Csősz, Brian L Fisher
The Camponotus grandidieri species group and Camponotus niveosetosus species group of the Malagasy region are revised. Species delimitation was inferred from the evidence of both qualitative morphological analysis and multivariate morphometry. The multivariate method combined the Nest Centroid (NC)-clustering method and Partitioning Algorithm based on Recursive Thresholding (PART) function to generate hypotheses about species boundaries (clusters) based on 19 continuous morphological traits of minor workers...
March 2, 2017: Zootaxa
https://www.readbyqxmd.com/read/28259176/molecular-and-serological-evidence-of-flea-associated-typhus-group-and-spotted-fever-group-rickettsial-infections-in-madagascar
#10
Rado J L Rakotonanahary, Alan Harrison, Alice N Maina, Ju Jiang, Allen L Richards, Minoarisoa Rajerison, Sandra Telfer
BACKGROUND: Rickettsiae are obligate intracellular bacteria responsible for many febrile syndromes around the world, including in sub-Saharan Africa. Vectors of these pathogens include ticks, lice, mites and fleas. In order to assess exposure to flea-associated Rickettsia species in Madagascar, human and small mammal samples from an urban and a rural area, and their associated fleas were tested. RESULTS: Anti-typhus group (TGR)- and anti-spotted fever group rickettsiae (SFGR)-specific IgG were detected in 24 (39%) and 21 (34%) of 62 human serum samples, respectively, using indirect ELISAs, with six individuals seropositive for both...
March 4, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28248673/evaluation-of-methicillin-resistant-staphylococcus-aureus-nasal-carriage-in-malagasy-pig-and-poultry-non-industrial-farmers
#11
Tsiry Rasamiravaka, Tojo Tiana Andriatsitohanana, Andry Rasamindrakotroka
INTRODUCTION: The laboratory of Training and Research in Medical Biology of Madagascar conducted a cross-sectional study to estimate the rate of S. aureus nasal carriage of pig and poultry Malagasy farmers. METHODOLOGY: Pig and poultry farmers from capital town of Madagascar were selected for nasal swabs collection with information on potential risk factors for S. aureus colonization, including animal exposure. RESULTS: Nasal swabs from 180 farmers (M/F sex ratio: 0...
February 28, 2017: Journal of Infection in Developing Countries
https://www.readbyqxmd.com/read/28240033/seroprevalence-of-rift-valley-fever-in-cattle-along-the-akagera-nyabarongo-rivers-rwanda
#12
Thérèse Umuhoza, Dirk Berkvens, Isidore Gafarasi, Joseph Rukelibuga, Borden Mushonga, Savino Biryomumaisho
Rift Valley fever (RVF) virus is caused by a zoonotic arbovirus that is endemic to eastern and southern Africa. It has also been reported in West and North Africa, Madagascar and the Arabian Peninsula. The virus is transmitted by mosquitoes, but people can also become infected while handling blood or other body fluids of animals and humans with RVF. In 2007, there was a large outbreak of RVF in Kenya, Tanzania, Sudan and Somalia. Outbreaks were also reported in South Africa in 2008-2011. The epidemiology of RVF and factors for disease occurrence in Rwanda are neither clear nor documented...
January 20, 2017: Journal of the South African Veterinary Association
https://www.readbyqxmd.com/read/28231385/most-children-who-took-part-in-a-comprehensive-malnutrition-programme-in-madagascar-reached-and-maintained-the-recovery-threshold
#13
Magnin Margot, Beat Stoll, Rajaobelina Voahangy, Emilien Jeannot
AIM: The benefits of including nutritional education in programmes that tackle moderate and severe acute malnutrition remain poorly documented. This study in Madagascar evaluated the nutritional status of children who took part in an innovative programme that included maternal education, on completion and after a year. METHODS: Each year, this outpatient programme admits 2,400 malnourished children from 6-59 months in the lower districts of Antananarivo, Madagascar...
February 23, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28222094/housing-improvements-and-malaria-risk-in-sub-saharan-africa-a-multi-country-analysis-of-survey-data
#14
Lucy S Tusting, Christian Bottomley, Harry Gibson, Immo Kleinschmidt, Andrew J Tatem, Steve W Lindsay, Peter W Gething
BACKGROUND: Improvements to housing may contribute to malaria control and elimination by reducing house entry by malaria vectors and thus exposure to biting. We tested the hypothesis that the odds of malaria infection are lower in modern, improved housing compared to traditional housing in sub-Saharan Africa (SSA). METHODS AND FINDINGS: We analysed 15 Demographic and Health Surveys (DHS) and 14 Malaria Indicator Surveys (MIS) conducted in 21 countries in SSA between 2008 and 2015 that measured malaria infection by microscopy or rapid diagnostic test (RDT)...
February 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28221119/pneumonic-plague-transmission-moramanga-madagascar-2015
#15
Beza Ramasindrazana, Voahangy Andrianaivoarimanana, Jean Marius Rakotondramanga, Dawn N Birdsell, Maherisoa Ratsitorahina, Minoarisoa Rajerison
During a pneumonic plague outbreak in Moramanga, Madagascar, we identified 4 confirmed, 1 presumptive, and 9 suspected plague case-patients. Human-to-human transmission among close contacts was high (reproductive number 1.44) and the case fatality rate was 71%. Phylogenetic analysis showed that the Yersinia pestis isolates belonged to group q3, different from the previous outbreak.
March 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28212875/genotyping-by-sequencing-provides-the-first-well-resolved-phylogeny-for-coffee-coffea-and-insights-into-the-evolution-of-caffeine-content-in-its-species-gbs-coffee-phylogeny-and-the-evolution-of-caffeine-content
#16
Perla Hamon, Corrinne E Grover, Aaron P Davis, Jean-Jacques Rakotomalala, Nathalie E Raharimalala, Victor A Albert, Hosahalli L Sreenath, Piet Stoffelen, Sharon E Mitchell, Emmanuel Couturon, Serge Hamon, Alexandre de Kochko, Dominique Crouzillat, Michel Rigoreau, Ucu Sumirat, Sélastique Akaffou, Romain Guyot
A comprehensive and meaningful phylogenetic hypothesis for the commercially important coffee genus (Coffea) has long been a key objective for coffee researchers. For molecular studies, progress has been limited by low levels of sequence divergence, leading to insufficient topological resolution and statistical support in phylogenetic trees, particularly for the major lineages and for the numerous species occurring in Madagascar. We report here the first almost fully resolved, broadly sampled phylogenetic hypothesis for coffee, the result of combining genotyping-by-sequencing (GBS) technology with a newly developed, lab-based workflow to integrate short read next-generation sequencing for low numbers of additional samples...
February 16, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28207261/cyclotheonellazoles-a-c-potent-protease-inhibitors-from-the-marine-sponge-theonella-aff-swinhoei
#17
Michal Issac, Maurice Aknin, Anne Gauvin-Bialecki, Nicole De Voogd, Alisson Ledoux, Michel Frederich, Yoel Kashman, Shmuel Carmeli
The extract of a sample of the sponge Theonella aff. swinhoei collected in Madagascar exhibited promising in vitro antiplasmodial activity. The antiplasmodial activity was ascribed in part to the known metabolite swinholide A. Further investigation of the extract afforded three unusual cyclic peptides, cyclotheonellazoles A-C (1-3), which contain six nonproteinogenic amino acids out of the eight acid units that compose these natural products. Among these acids the most novel were 4-propenoyl-2-tyrosylthiazole and 3-amino-4-methyl-2-oxohexanoic acid...
February 16, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/28207156/integrating-community-based-family-planning-services-with-local-marine-conservation-initiatives-in-southwest-madagascar-changes-in-contraceptive-use-and-fertility
#18
Laura Robson, Martine Holston, Caroline Savitzky, Vik Mohan
This study assessed changes in contraceptive use and fertility between 2009 and 2013 in the Velondriake locally managed marine area of southwest Madagascar where marine conservation organization Blue Ventures began implementing an integrated health-environment program in 2007. The proportion of sexually active women aged 15 to 49 years using hormonal contraception and/or condoms during last intercourse increased more than twofold from 25 percent in 2009 to 59 percent in 2013. The number of births in the last 12 months per 1,000 women of reproductive age declined by 28 percent over the same period from 196 in 2009 to 141 in 2013...
February 16, 2017: Studies in Family Planning
https://www.readbyqxmd.com/read/28207055/the-effect-of-price-on-demand-for-and-use-of-bednets-evidence-from-a-randomized-experiment-in-madagascar
#19
Alison B Comfort, Paul J Krezanoski
No abstract text is available yet for this article.
March 1, 2017: Health Policy and Planning
https://www.readbyqxmd.com/read/28199150/development-and-validation-of-a-cultural-method-for-the-detection-and-isolation-of-salmonella-in-cloves
#20
Guodong Zhang, Laila Ali, Vikas Gill, Aparna Tatavarthy, Xiaohong Deng, Lijun Hu, Eric W Brown, Thomas S Hammack
Detection of Salmonella in some spices, such as cloves, remains a challenge due to their inherent antimicrobial properties. The purpose of this study was to develop an effective detection method for Salmonella from spices using cloves as a model. Two clove varieties, Ceylon and Madagascar, were used in the study. Cloves were inoculated with Salmonella enterica subsp. enterica serotypes Montevideo, Typhimurium, or Weltevreden at about 1, 3, or 6 log CFU/25 g. Two test portion sizes, 10 and 25 g, were compared...
February 15, 2017: Journal of Food Protection
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