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https://www.readbyqxmd.com/read/28224659/assessment-of-the-toxicity-of-pesticides-on-honey-bee-drone-fertility-using-laboratory-and-semi-field-approaches-a-case-study-of-fipronil
#1
Guillaume Kairo, Yannick Poquet, Haïthem Haji, Sylvie Tchamitchian, Marianne Cousin, Marc Bonnet, Michel Pelissier, André Kretzschmar, Luc P Belzunces, Jean-Luc Brunet
Concern about the reproductive toxicity of plant protection products (PPPs) in honey bee reproducers is increasing. Because the reproductive capacity of honey bees is not currently considered during the risk assessment procedures performed during PPP registration, it is important to provide methods to assess such potential impairments. To achieve this aim, we used two different approaches that involved semi-field (SF) and laboratory (Lab) conditions to study the impact of Fipronil on drone fertility. For each approach, the drones were reared for 20 days, from emergence to sexual maturity, and exposed to Fipronil via a contaminated sugar solution...
February 22, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28163882/bioinspired-morphing-wings-for-extended-flight-envelope-and-roll-control-of-small-drones
#2
M Di Luca, S Mintchev, G Heitz, F Noca, D Floreano
Small-winged drones can face highly varied aerodynamic requirements, such as high manoeuvrability for flight among obstacles and high wind resistance for constant ground speed against strong headwinds that cannot all be optimally addressed by a single aerodynamic profile. Several bird species solve this problem by changing the shape of their wings to adapt to the different aerodynamic requirements. Here, we describe a novel morphing wing design composed of artificial feathers that can rapidly modify its geometry to fulfil different aerodynamic requirements...
February 6, 2017: Interface Focus
https://www.readbyqxmd.com/read/28150219/sexual-response-of-male-drosophila-to-honey-bee-queen-mandibular-pheromone-implications-for-genetic-studies-of-social-insects
#3
Justin R Croft, Tom Liu, Alison L Camiletti, Anne F Simon, Graham J Thompson
Honey bees secrete a queen mandibular pheromone that renders workers reproductively altruistic and drones sexually attentive. This sex-specific function of QMP may have evolved from a sexually dimorphic signaling mechanism derived from pre-social ancestors. If so, there is potential for pre-social insects to respond to QMP, and in a manner that is comparable to its normal effect on workers and drones. Remarkably, QMP applied to female Drosophila does induce worker-like qualities [Camiletti et al. (Entomol Exp Appl 147:262, 2013)], and we here extend this comparison to examine the effects of bee pheromone on male fruit flies...
February 1, 2017: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/28135666/the-combined-effects-of-a-monotonous-diet-and-exposure-to-thiamethoxam-on-the-performance-of-bumblebee-micro-colonies
#4
C Dance, C Botías, D Goulson
There is a pressing need to better understand the factors contributing to declines of wild pollinators such as bumblebees. Many different contributors have been postulated including: loss of flower-rich habitats and nesting sites; monotonous diets; impacts of invasive pathogens; exposure to pesticides such as neonicotinoids. Past research has tended to investigate the impacts of these stressors in isolation, despite the increasing recognition that bees are simultaneously exposed to a combination of stressors, with potentially additive or synergistic effects...
January 27, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28110000/drones-may-be-used-to-save-lives-in-out-of-hospital-cardiac-arrest-due-to-drowning
#5
A Claesson, L Svensson, P Nordberg, M Ringh, M Rosenqvist, T Djarv, J Samuelsson, O Hernborg, P Dahlbom, A Jansson, J Hollenberg
BACKGROUND: Drowning leading to out-of-hospital cardiac arrest (OHCA) and death is a major public health concern. Submersion with duration of less than 10min is associated with favorable neurological outcome and nearby bystanders play a considerable role in rescue and resuscitation. Drones can provide a visual overview of an accident scene, their potential as lifesaving tools in drowning has not been evaluated. AIM: The aim of this simulation study was to evaluate the efficiency of a drone for providing earlier location of a submerged possible drowning victim in comparison with standard procedure...
January 18, 2017: Resuscitation
https://www.readbyqxmd.com/read/28107354/visual-adaptations-for-mate-detection-in-the-male-carpenter-bee-xylocopa-tenuiscapa
#6
Hema Somanathan, Renee Maria Borges, Eric J Warrant, Almut Kelber
Sexual dimorphism in eye structure is attributed to sexual selection in animals that employ vision for locating mates. In many male insects, large eyes and eye regions of higher acuity are believed to facilitate the location of females. Here, we compare various features of male and female eyes in three sympatric carpenter bee species, which include two diurnal species (Xylocopa tenuiscapa and X. leucothorax) as well as a nocturnal species (X. tranquebarica). In X. tenuiscapa, males have larger eyes than females, while in the nocturnal X...
2017: PloS One
https://www.readbyqxmd.com/read/28088225/using-low-cost-drones-to-map-malaria-vector-habitats
#7
Andy Hardy, Makame Makame, Dónall Cross, Silas Majambere, Mwinyi Msellem
BACKGROUND: There is a growing awareness that if we are to achieve the ambitious goal of malaria elimination, we must compliment indoor-based vector control interventions (such as bednets and indoor spraying) with outdoor-based interventions such as larval source management (LSM). The effectiveness of LSM is limited by our capacity to identify and map mosquito aquatic habitats. This study provides a proof of concept for the use of a low-cost (< $1000) drone (DJI Phantom) for mapping water bodies in seven sites across Zanzibar including natural water bodies, irrigated and non-irrigated rice paddies, peri-urban and urban locations...
January 14, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/27993369/marine-litter-abundance-and-distribution-on-beaches-on-the-isle-of-r%C3%A3-gen-considering-the-influence-of-exposition-morphology-and-recreational-activities
#8
Elena Hengstmann, Dennis Gräwe, Matthias Tamminga, Elke Kerstin Fischer
The abundance, weight and composition of marine debris were determined at the northwest coast of the Isle of Rügen in 2015. A total number of 1115 macrolitter items were registered, resulting in an abundance of 304±88.96 items per 100m of beach length and therefore being greater than the abundances found for other beaches at the Baltic Sea. Macrolitter items were predominantly composed of plastic, on average 83%. The four beaches under investigation have different exposition as well as touristic levels. The differing influence of wind and water currents as well as recreational activities on the macrolitter at these beaches was detectable...
December 16, 2016: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/27895050/social-signals-and-aversive-learning-in-honey-bee-drones-and-workers
#9
Arian Avalos, Eddie Pérez, Lianna Vallejo, María E Pérez, Charles I Abramson, Tugrul Giray
The dissemination of information is a basic element of group cohesion. In honey bees (Apis mellifera Linnaeus 1758), like in other social insects, the principal method for colony-wide information exchange is communication via pheromones. This medium of communication allows multiple individuals to conduct tasks critical to colony survival. Social signaling also establishes conflict at the level of the individual who must trade-off between attending to the immediate environment or the social demand. In this study we examined this conflict by challenging highly social worker honey bees, and less social male drone honey bees undergoing aversive training by presenting them with a social stress signal (isopentyl acetate, IPA)...
January 15, 2017: Biology Open
https://www.readbyqxmd.com/read/27894553/drones-rule
#10
John R Clark
No abstract text is available yet for this article.
November 2016: Air Medical Journal
https://www.readbyqxmd.com/read/27861967/drone-transportation-of-blood-products
#11
Timothy Amukele, Paul M Ness, Aaron A R Tobian, Joan Boyd, Jeff Street
BACKGROUND: Small civilian unmanned aerial vehicles (drones) are a novel way to transport small goods. To the best of our knowledge there are no studies examining the impact of drone transport on blood products, describing approaches to maintaining temperature control, or component physical characteristics during drone transport. STUDY DESIGN AND METHODS: Six leukoreduced red blood cell (RBC) and six apheresis platelet (PLT) units were split using sterile techniques...
November 11, 2016: Transfusion
https://www.readbyqxmd.com/read/27852762/transcriptomic-analysis-of-instinctive-and-learned-reward-related-behaviors-in-honey-bees
#12
Nicholas L Naeger, Gene E Robinson
We used transcriptomics to compare instinctive and learned, reward-based honey bee behaviors with similar spatio-temporal components: mating flights by males (drones) and time-trained foraging flights by females (workers), respectively. Genome-wide gene expression profiling via RNA sequencing was performed on the mushroom bodies, a region of the brain known for multi-modal sensory integration and responsive to various types of reward. Differentially expressed genes (DEGs) associated with the onset of mating (623 genes) were enriched for the gene ontology (GO) categories of Transcription, Unfolded Protein Binding, Post-embryonic Development, and Neuron Differentiation...
November 15, 2016: Journal of Experimental Biology
https://www.readbyqxmd.com/read/27834367/wearable-energy-smart-ribbons-for-synchronous-energy-harvest-and-storage
#13
Chao Li, Md Monirul Islam, Julian Moore, Joseph Sleppy, Caleb Morrison, Konstantin Konstantinov, Shi Xue Dou, Chait Renduchintala, Jayan Thomas
A promising energy source for many current and future applications is a ribbon-like device that could simultaneously harvest and store energy. Due to the high flexibility and weavable property, a fabric/matrix made using these ribbons could be highly beneficial for powering wearable electronics. Unlike the approach of using two separate devices, here we report a ribbon that integrates a solar cell and a supercapacitor. The electrons generated by the solar cell are directly transferred and stored on the reverse side of its electrode which in turn also functions as an electrode for the supercapacitor...
November 11, 2016: Nature Communications
https://www.readbyqxmd.com/read/27807272/shunt-peaking-in-neural-membranes
#14
Francisco J H Heras, Simon B Laughlin, Jeremy E Niven
Capacitance limits the bandwidth of engineered and biological electrical circuits because it determines the gain-bandwidth product (GBWP). With a fixed GBWP, bandwidth can only be improved by decreasing gain. In engineered circuits, an inductance reduces this limitation through shunt peaking but no equivalent mechanism has been reported for biological circuits. We show that in blowfly photoreceptors a voltage-dependent K(+) conductance, the fast delayed rectifier (FDR), produces shunt peaking thereby increasing bandwidth without reducing gain...
November 2016: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/27782058/from-wsn-towards-wot-open-api-scheme-based-on-onem2m-platforms
#15
Jaeho Kim, Sung-Chan Choi, Il-Yeup Ahn, Nak-Myoung Sung, Jaeseok Yun
Conventional computing systems have been able to be integrated into daily objects and connected to each other due to advances in computing and network technologies, such as wireless sensor networks (WSNs), forming a global network infrastructure, called the Internet of Things (IoT). To support the interconnection and interoperability between heterogeneous IoT systems, the availability of standardized, open application programming interfaces (APIs) is one of the key features of common software platforms for IoT devices, gateways, and servers...
October 6, 2016: Sensors
https://www.readbyqxmd.com/read/27743422/food-to-some-poison-to-others-honeybee-royal-jelly-and-its-growth-inhibiting-effect-on-european-foulbrood-bacteria
#16
Thomas V Vezeteu, Otilia Bobiş, Robin F A Moritz, Anja Buttstedt
Honeybee colonies (Apis mellifera) serve as attractive hosts for a variety of pathogens providing optimal temperatures, humidity, and an abundance of food. Thus, honeybees have to deal with pathogens throughout their lives and, even as larvae they are affected by severe brood diseases like the European Foulbrood caused by Melissococcus plutonius. Accordingly, it is highly adaptive that larval food jelly contains antibiotic compounds. However, although food jelly is primarily consumed by bee larvae, studies investigating the antibiotic effects of this jelly have largely concentrated on bacterial human diseases...
February 2017: MicrobiologyOpen
https://www.readbyqxmd.com/read/27729058/unmanned-aerial-vehicles-drones-in-out-of-hospital-cardiac-arrest
#17
A Claesson, D Fredman, L Svensson, M Ringh, J Hollenberg, P Nordberg, M Rosenqvist, T Djarv, S Österberg, J Lennartsson, Y Ban
BACKGROUND: The use of an automated external defibrillator (AED) prior to EMS arrival can increase 30-day survival in out-of-hospital cardiac arrest (OHCA) significantly. Drones or unmanned aerial vehicles (UAV) can fly with high velocity and potentially transport devices such as AEDs to the site of OHCAs. The aim of this explorative study was to investigate the feasibility of a drone system in decreasing response time and delivering an AED. METHODS: Data of Global Positioning System (GPS) coordinates from historical OHCA in Stockholm County was used in a model using a Geographic Information System (GIS) to find suitable placements and visualize response times for the use of an AED equipped drone...
October 12, 2016: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
https://www.readbyqxmd.com/read/27689347/variable-stiffness-fiber-with-self-healing-capability
#18
Alice Tonazzini, Stefano Mintchev, Bryan Schubert, Barbara Mazzolai, Jun Shintake, Dario Floreano
A variable stiffness fiber made of silicone and low melting point alloys quickly becomes >700 times softer and >400 times more deformable when heated above 62 °C. It shows remarkable self-healing properties and can be clamped, knitted, and bonded, as shown in a foldable multi-purpose drone, a wearable cast for bone injuries, and a soft multi-directional actuator.
December 2016: Advanced Materials
https://www.readbyqxmd.com/read/27672518/small-unmanned-aerial-vehicles-micro-uavs-drones-in-plant-ecology
#19
Mitchell B Cruzan, Ben G Weinstein, Monica R Grasty, Brendan F Kohrn, Elizabeth C Hendrickson, Tina M Arredondo, Pamela G Thompson
PREMISE OF THE STUDY: Low-elevation surveys with small aerial drones (micro-unmanned aerial vehicles [UAVs]) may be used for a wide variety of applications in plant ecology, including mapping vegetation over small- to medium-sized regions. We provide an overview of methods and procedures for conducting surveys and illustrate some of these applications. METHODS: Aerial images were obtained by flying a small drone along transects over the area of interest. Images were used to create a composite image (orthomosaic) and a digital surface model (DSM)...
September 2016: Applications in Plant Sciences
https://www.readbyqxmd.com/read/27658924/toward-an-understanding-of-divergent-compound-eye-development-in-drones-and-workers-of-the-honeybee-apis-mellifera-l-a-correlative-analysis-of-morphology-and-gene-expression
#20
David S Marco Antonio, Klaus Hartfelder
Eye development in insects is best understood in Drosophila melanogaster, but little is known for other holometabolous insects. Combining a morphological with a gene expression analysis, we investigated eye development in the honeybee, putting emphasis on the sex-specific differences in eye size. Optic lobe development starts from an optic lobe anlage in the larval brain, which sequentially gives rise to the lobula, medulla, and lamina. The lamina differentiates in the last larval instar, when it receives optic nerve projections from the developing retina...
January 2017: Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution
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