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https://www.readbyqxmd.com/read/29858748/queen-control-or-queen-signal-in-ants-what-remains-of-the-controversy-25-years-after-keller-and-nonacs-seminal-paper
#1
REVIEW
Irene Villalta, Silvia Abril, Xim Cerdá, Raphael Boulay
Ant queen pheromones (QPs) have long been known to affect colony functioning. In many species, QPs affect important reproductive functions such as diploid larvae sexualization and egg-laying by workers, unmated queens (gynes), or other queens. Until the 1990s, these effects were generally viewed to be the result of queen manipulation through the use of coercive or dishonest signals. However, in their seminal 1993 paper, Keller and Nonacs challenged this idea, suggesting that QPs had evolved as honest signals that informed workers and other colony members of the queen's presence and reproductive state...
June 2, 2018: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/29785626/sex-attractant-pheromones-of-virgin-queens-of-sympatric-slave-making-ant-species-in-the-genus-polyergus-and-their-possible-roles-in-reproductive-isolation
#2
Les Greenberg, Christine A Johnson, James C Trager, J Steven McElfresh, Joshua Rodstein, Jocelyn G Millar
Species of the ant genus Polyergus are social parasites that steal brood from colonies of their hosts in the closely related genus Formica. Upon emergence as adults in a mixed population, host Formica workers carry out all the normal worker functions within the Polyergus colony, including foraging, feeding, grooming, and rearing brood of the parasitic Polyergus ants. Some unmated Polyergus gynes (queens) run in the raiding columns of their colonies and attract males by releasing a pheromone from their mandibular glands...
May 22, 2018: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/29706662/colony-size-and-brood-investment-of-myrmica-rubra-ant-colonies-in-habitats-invaded-by-goldenrods
#3
I M Grześ, P Ślipiński, H Babik, D Moroń, B Walter, G Trigos Peral, I Maak, M Witek
Ant richness and abundance are negatively affected by the invasion of alien goldenrods ( Solidago sp.). However, little is known about the mechanisms standing behind the impact of the invaders on ant life history, such as colony investments in growth and reproduction. We examined this problem of the investments of Myrmica rubra ant colonies living in different grasslands invaded and non-invaded by goldenrods. Altogether, 47 colonies were analysed; and for each colony, we calculated the number of queens, workers and the production of young workers, gynes, and males...
2018: Insectes Sociaux
https://www.readbyqxmd.com/read/29368265/caste-fate-determination-primarily-occurs-after-adult-emergence-in-a-primitively-eusocial-paper-wasp-significance-of-the-photoperiod-during-the-adult-stage
#4
Hideto Yoshimura, Yoshihiro Y Yamada
Independent-founding paper wasps constitute a major group of primitively eusocial insects, and when caste-fate determination occurs in temperate species of these wasps, particularly regarding whether it occurs before or after emergence, remains unclear. No critical morphological differences occur between potential queens of the next generation (often called gynes) and workers in primitively eusocial insects. The gynes of temperate species are characterized by diapausing, and the nutrients available during the larval stage have often been believed to determine caste fate...
January 24, 2018: Die Naturwissenschaften
https://www.readbyqxmd.com/read/29350346/chemical-characterization-of-young-virgin-queens-and-mated-egg-laying-queens-in-the-ant-cataglyphis-cursor-random-forest-classification-analysis-for-multivariate-datasets
#5
Thibaud Monnin, Florence Helft, Chloé Leroy, Patrizia d'Ettorre, Claudie Doums
Social insects are well known for their extremely rich chemical communication, yet their sex pheromones remain poorly studied. In the thermophilic and thelytokous ant, Cataglyphis cursor, we analyzed the cuticular hydrocarbon profiles and Dufour's gland contents of queens of different age and reproductive status (sexually immature gynes, sexually mature gynes, mated and egg-laying queens) and of workers. Random forest classification analyses showed that the four groups of individuals were well separated for both chemical sources, except mature gynes that clustered with queens for cuticular hydrocarbons and with immature gynes for Dufour's gland secretions...
February 2018: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/29245631/a-new-species-of-i-tyrannomyrmex-i-fern%C3%A3-ndez-2003-formicidae-myrmicinae-solenopsidini-from-western-ghats-kerala-india
#6
Kalesh Sadasivan, Manoj Kripakaran
A new species of Tyrannomyrmex (Hymenoptera, Formicidae), T. alii sp. nov., is described from the Western Ghats of Kerala State in southern India. This new species can be distinguished from other Tyrannomyrmex species using morphological characters, from T.dux by the petiolar shape, and from T. legatus and T.rex by surface sculpture and pilosity. The gyne of the genus is described for the first time. We provide detailed morphological descriptions of the gyne and worker castes, images from scanning electron microscopy, a key to all four known species of Tyrannomyrmex, and a note on the ecology of this rare genus...
November 7, 2017: Zootaxa
https://www.readbyqxmd.com/read/29021562/the-sex-pheromone-of-a-globally-invasive-honey-bee-predator-the-asian-eusocial-hornet-vespa-velutina
#7
Ping Wen, Ya-Nan Cheng, Shi-Hao Dong, Zheng-Wei Wang, Ken Tan, James C Nieh
The Asian hornet, Vespa velutina, is an invasive, globally-distributed predator of European honey bees and other insects. To better under its reproductive biology and to find a specific, effective, and low-impact control method for this species, we identified and tested the key compounds in V. velutina sex pheromone. Virgin gynes (reproductive females) produced this sex pheromone in the sixth intersegmental sternal glands of their abdomens. The active compounds were 4-oxo-octanoic acid (4-OOA, 10.4 μg bee-1 ) and 4-oxo-decanoic acid (4-ODA, 13...
October 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28986645/assessing-the-utility-of-a-distress-screening-tool-at-capturing-sexual-concerns-in-a-gyne-oncology-follow-up-clinic
#8
Lauren M Walker, Majken P Villiger, John W Robinson
PURPOSE: Communication and assessment of sexual health within cancer care is poor despite high rates of sexual dysfunction in cancer survivors. Screening for distress programs have been implemented, as a standardized part of cancer care across Canada, with the aim of increasing identification and improving access to support. Alberta Health Services uses a general distress screening form, containing the Canadian Problem Checklist, which includes a list of possible problems, one of which is "intimacy/sexuality...
March 2018: Supportive Care in Cancer: Official Journal of the Multinational Association of Supportive Care in Cancer
https://www.readbyqxmd.com/read/28926617/hidden-biodiversity-in-entomological-collections-the-overlooked-co-occurrence-of-dipteran-and-hymenopteran-ant-parasitoids-in-stored-biological-material
#9
Gabriela Pérez-Lachaud, Jean-Paul Lachaud
Biological collections around the world are the repository of biodiversity on Earth; they also hold a large quantity of unsorted, unidentified, or misidentified material and can house behavioral information on species that are difficult to access or no longer available to science. Among the unsorted, alcohol-preserved material stored in the Formicidae Collection of the 'El Colegio de la Frontera Sur' Research Center (Chetumal, Mexico), we found nine colonies of the ponerine ant Neoponera villosa, that had been collected in bromeliads at Calakmul (Campeche, Mexico) in 1999...
2017: PloS One
https://www.readbyqxmd.com/read/28637858/maternal-and-nourishment-factors-interact-to-influence-offspring-developmental-trajectories-in-social-wasps
#10
Jennifer M Jandt, Sainath Suryanarayanan, John C Hermanson, Robert L Jeanne, Amy L Toth
The social and nutritional environments during early development have the potential to affect offspring traits, but the mechanisms and molecular underpinnings of these effects remain elusive. We used Polistes fuscatus paper wasps to dissect how maternally controlled factors (vibrational signals and nourishment) interact to induce different caste developmental trajectories in female offspring, leading to worker or reproductive (gyne) traits. We established a set of caste phenotype biomarkers in P. fuscatus females, finding that gyne-destined individuals had high expression of three caste-related genes hypothesized to have roles in diapause and mitochondrial metabolism...
June 28, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28591211/dispersal-strategies-in-the-highly-polygynous-ant-crematogaster-orthocrema-pygmaea-forel-formicidae-myrmicinae
#11
Rachid Hamidi, Jean-Christophe de Biseau, Thomas Bourguignon, Glauco Bezerra Martins Segundo, Matheus Torres Marinho Bezerril Fontenelle, Yves Quinet
In ants, dispersal strategies and morphology of female sexuals are generally linked to the mode of colony founding. In species using long-range dispersal tactics, queen/worker dimorphism is generally high and young queens are able to initiate new colonies by themselves, using their metabolic reserves. By contrast, in species using short-range dispersal strategies, queen/worker dimorphism is generally low and, due to their limited metabolic reserves, queens have lost the capacity to raise their brood alone and to found their colony independently...
2017: PloS One
https://www.readbyqxmd.com/read/28493295/towards-ultrasound-guided-adaptive-radiotherapy-for-cervical-cancer-evaluation-of-elekta-s-semiautomated-uterine-segmentation-method-on-3d-ultrasound-images
#12
Sarah A Mason, Tuathan P O'Shea, Ingrid M White, Susan Lalondrelle, Kate Downey, Mariwan Baker, Claus F Behrens, Jeffrey C Bamber, Emma J Harris
PURPOSE: 3D ultrasound (US) images of the uterus may be used to adapt radiotherapy (RT) for cervical cancer patients based on changes in daily anatomy. This requires accurate on-line segmentation of the uterus. The aim of this work was to assess the accuracy of Elekta's "Assisted Gyne Segmentation" (AGS) algorithm in semi-automatically segmenting the uterus on 3D transabdominal ultrasound images by comparison with manual contours. MATERIALS & METHODS: Nine patients receiving RT for cervical cancer were imaged with the 3D Clarity® transabdominal probe at RT planning, and 1 to 7 times during treatment...
July 2017: Medical Physics
https://www.readbyqxmd.com/read/28404777/transcriptomics-of-an-extended-phenotype-parasite-manipulation-of-wasp-social-behaviour-shifts-expression-of-caste-related-genes
#13
Amy C Geffre, Ruolin Liu, Fabio Manfredini, Laura Beani, Jeyaraney Kathirithamby, Christina M Grozinger, Amy L Toth
Parasites can manipulate host behaviour to increase their own transmission and fitness, but the genomic mechanisms by which parasites manipulate hosts are not well understood. We investigated the relationship between the social paper wasp, Polistes dominula , and its parasite, Xenos vesparum (Insecta: Strepsiptera), to understand the effects of an obligate endoparasitoid on its host's brain transcriptome. Previous research suggests that X. vesparum shifts aspects of host social caste-related behaviour and physiology in ways that benefit the parasitoid...
April 12, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28361946/rediscovery-and-reclassification-of-the-dipteran-taxon-nothomicrodon-wheeler-an-exclusive-endoparasitoid-of-gyne-ant-larvae
#14
Gabriela Pérez-Lachaud, Benoit J B Jahyny, Gunilla Ståhls, Graham Rotheray, Jacques H C Delabie, Jean-Paul Lachaud
The myrmecophile larva of the dipteran taxon Nothomicrodon Wheeler is rediscovered, almost a century after its original description and unique report. The systematic position of this dipteran has remained enigmatic due to the absence of reared imagos to confirm indentity. We also failed to rear imagos, but we scrutinized entire nests of the Brazilian arboreal dolichoderine ant Azteca chartifex which, combined with morphological and molecular studies, enabled us to establish beyond doubt that Nothomicrodon belongs to the Phoridae (Insecta: Diptera), not the Syrphidae where it was first placed, and that the species we studied is an endoparasitoid of the larvae of A...
March 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28299419/insights-into-the-role-of-age-and-social-interactions-on-the-sexual-attractiveness-of-queens-in-an-eusocial-bee-melipona-flavolineata-apidae-meliponini
#15
Jamille Costa Veiga, Cristiano Menezes, Felipe Andrés León Contrera
The attraction of sexual partners is a vital necessity among insects, and it involves conflict of interests and complex communication systems among male and female. In this study, we investigated the developing of sexual attractiveness in virgin queens (i.e., gynes) of Melipona flavolineata, an eusocial stingless bee. We followed the development of sexual attractiveness in 64 gynes, belonging to seven age classes (0, 3, 6, 9, 15, 18 days post-emergence), and we also evaluated the effect of different social interactions (such as competition between queens and interactions with workers) on the development of attractiveness in other 60 gynes...
April 2017: Die Naturwissenschaften
https://www.readbyqxmd.com/read/28152942/communities-of-practice-a-jurisdictional-approach-to-improving-the-quality-of-care-in-radiation-medicine-in-ontario
#16
Michelle Ang, Lindsay Elizabeth Reddeman, Michael Sharpe, Margaret Hart, Carina Simniceanu, Stephen Breen, Joon-Hyung J Kim, Dani Scott, Khaled Zaza, David D'Souza, Michael F Milosevic, Stewart Gaede, Andrea Marshall, Brian P Yaremko, Katharina Sixel, Nicole Harnett, Eric Gutierrez, Padraig Richard Warde
122 Background: The Radiation Treatment Program (RTP) at Cancer Care Ontario (CCO) established several Communities of Practice (CoPs), with the goal of improving radiation treatment (RT) quality and safety. The RTP identifies variation in practice and quality improvement (QI) opportunities in the 14 Regional Cancer Centres (RCCs) and facilitates the development of CoPs to share best practices and standardize care. METHODS: Since 2010, the RTP has formed 7 CoPs ( > 185 members in total): 4 intra-disciplinary (Radiation Therapy, Medical Physics, Advanced Practice Radiation Therapy, Radiation Safety) and 3 inter-disciplinary (Head and Neck (HN), Gynecological (GYNE) and Lung Cancer)...
March 2016: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/27913150/juvenile-hormone-titers-ovarian-status-and-epicuticular-hydrocarbons-in-gynes-and-workers-of-the-paper-wasp-belonogaster-longitarsus
#17
Hans C Kelstrup, Klaus Hartfelder, Nanike Esterhuizen, Theresa C Wossler
The prevailing paradigm for social wasp endocrinology is that of juvenile hormone (JH) functioning pleiotropically in potential and actual queens, where it fuels dominance behaviors, stimulates ovarian growth and/or affects the production of status-linked cuticular compounds. In colonies with annual cycles (e.g., temperate-zone species), female adults produced at the end of the summer (called gynes) are physiologically primed to hibernate. Despite the absence of egg-laying in the pre-overwintering phase, gynes engage in dominance interactions that may affect reproductive potential following hibernation...
April 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/27853401/lenomyrmex-hoelldobleri-a-new-ant-species-discovered-in-the-stomach-of-the-dendrobatid-poison-frog-oophaga-sylvatica-funkhouser
#18
Christian Rabeling, Jeffrey Sosa-Calvo, Lauren A O'Connell, Luis A Coloma, Fernando Fernández
The ant genus Lenomyrmex was recently discovered and described from mid to high elevation rainforests in southern Central and northwestern South America. Lenomyrmex currently consists of six described species, which are only rarely collected. Here, we add a new species, Lenomyrmex hoelldoblerisp. n., which was discovered in a stomach content sample of the dendrobatid frog, Oophaga sylvatica, from northwestern Ecuador. Lenomyrmex hoelldobleri can be distinguished from other species in the genus by the presence of a well-developed petiolar node, whereas in all other species the node of the petiole is ill-defined...
2016: ZooKeys
https://www.readbyqxmd.com/read/27433124/taxonomic-revision-of-stigmatomma-roger-hymenoptera-formicidae-in-the-malagasy-region
#19
Flavia A Esteves, Brian L Fisher
In this study we present the first taxonomic revision of the ant genus Stigmatomma in the Malagasy biogeographic region, re-describe the previously known S. besucheti Baroni-Urbani, and describe seven new species to science (S. bolabola sp. n., S. irayhady sp. n., S. janovitsika sp. n., S. liebe sp. n., S. roahady sp. n., S. sakalava sp. n., and S. tsyhady sp. n.). The revision is based on the worker caste, but we provide brief descriptions of gynes and males for some species. Species descriptions, diagnosis, character discussion, identification key, and glossary are illustrated with 360 high-quality montage and SEM images...
2016: Biodiversity Data Journal
https://www.readbyqxmd.com/read/27055486/adaptive-radiotherapy-strategies-for-pelvic-tumors-a-systematic-review-of-clinical-implementations
#20
REVIEW
Sara Thörnqvist, Liv B Hysing, Laura Tuomikoski, Anne Vestergaard, Kari Tanderup, Ludvig P Muren, Ben J M Heijmen
UNLABELLED: Introdution: Variation in shape, position and treatment response of both tumor and organs at risk are major challenges for accurate dose delivery in radiotherapy. Adaptive radiotherapy (ART) has been proposed to customize the treatment to these motion/response patterns of the individual patients, but increases workload and thereby challenges clinical implementation. This paper reviews strategies and workflows for clinical and in silico implemented ART for prostate, bladder, gynecological (gyne) and ano-rectal cancers...
August 2016: Acta Oncologica
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