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https://www.readbyqxmd.com/read/28935437/responses-to-sugar-and-sugar-receptor-gene-expression-in-different-social-roles-of-the-honeybee-apis-mellifera
#1
Laura Değirmenci, Markus Thamm, Ricarda Scheiner
Honeybees (Apis mellifera) are well-known for their sophisticated division of labor with each bee performing sequentially a series of social tasks. Colony organization is largely based on age-dependent division of labor. While bees perform several tasks inside the hive such as caring for brood ("nursing"), cleaning or sealing brood cells or producing honey, older bees leave to colony to collect pollen (proteins) and nectar (carbohydrates) as foragers. The most pronounced behavioral transition occurs when nurse bees become foragers...
September 18, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/28932770/potential-distribution-dataset-of-honeybees-in-indian-ocean-islands-case-study-of-zanzibar-island
#2
Sizah Mwalusepo, Eliud Muli, Kiatoko Nkoba, Everlyn Nguku, Joseph Kilonzo, Elfatih M Abdel-Rahman, Tobias Landmann, Asha Fakih, Suresh Raina
Honeybees (Apis mellifera) are principal insect pollinators, whose worldwide distribution and abundance is known to largely depend on climatic conditions. However, the presence records dataset on potential distribution of honeybees in Indian Ocean Islands remain less documented. Presence records in shape format and probability of occurrence of honeybees with different temperature change scenarios is provided in this article across Zanzibar Island. Maximum entropy (Maxent) package was used to analyse the potential distribution of honeybees...
October 2017: Data in Brief
https://www.readbyqxmd.com/read/28931157/is-nocturnal-foraging-in-a-tropical-bee-an-escape-from-interference-competition
#3
Adam R Smith, Shannon M Kitchen, Ryan M Toney, Christian Ziegler
Temporal niche partitioning may result from interference competition if animals shift their activity patterns to avoid aggressive competitors. If doing so also shifts food sources, it is difficult to distinguish the effects of interference and consumptive competition in selecting for temporal niche shift. Bees compete for pollen and nectar from flowers through both interference and consumptive competition, and some species of bees have evolved nocturnality. Here, we use tropical forest canopy towers to observe bees (the night-flying sweat bees Megalopta genalis and M...
January 1, 2017: Journal of Insect Science
https://www.readbyqxmd.com/read/28928516/enzyme-activity-amino-acid-profiles-and-hydroxymethylfurfural-content-in-ethiopian-monofloral-honey
#4
Abera Belay, Gulelat Desse Haki, Marc Birringer, Hannelore Borck, Young-Chul Lee, Kyung-Tack Kim, Kaleab Baye, Samuel Melaku
The enzymes activity, hydroxymethylfurfural (HMF) and amino acids in honeys are relatively low. However, they play very significant role for honey quality. In this study, enzymes, amino acids and HMF contents of Ethiopian monofloral honeys were investigated. Diastase, invertase and HMF were analyzed based on the Harmonized International Honey Commission method and amino acids using amino acids analyzer (HPLC). Diastase activity ranged from 3.91 ± 0.730 (Schefflera abyssinica) to 13.6 ± 2.30 [Becium grandiflorum (L: Lalibella)]; invertase 36...
August 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28916947/honey-bees-possess-a-polarity-sensitive-magnetoreceptor
#5
Veronika Lambinet, Michael E Hayden, Chloe Reid, Gerhard Gries
Honey bees, Apis mellifera, exploit the geomagnetic field for orientation during foraging and for alignment of their combs within hives. We tested the hypothesis that honey bees sense the polarity of magnetic fields. We created an engineered magnetic anomaly in which the magnetic field generally either converged toward a sugar reward in a watch glass, or away from it. After bees in behavioral field studies had learned to associate this anomaly with a sugar water reward, we subjected them to two experiments performed in random order...
September 15, 2017: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/28916631/experience-during-early-adulthood-shapes-the-learning-capacities-and-the-number-of-synaptic-boutons-in-the-mushroom-bodies-of-honey-bees-apis-mellifera
#6
Amélie Cabirol, Rufus Brooks, Claudia Groh, Andrew B Barron, Jean-Marc Devaud
The honey bee mushroom bodies (MBs) are brain centers required for specific learning tasks. Here, we show that environmental conditions experienced as young adults affect the maturation of MB neuropil and performance in a MB-dependent learning task. Specifically, olfactory reversal learning was selectively impaired following early exposure to an impoverished environment lacking some of the sensory and social interactions present in the hive. In parallel, the overall number of synaptic boutons increased within the MB olfactory neuropil, whose volume remained unaffected...
October 2017: Learning & Memory
https://www.readbyqxmd.com/read/28916146/chinese-sacbrood-virus-infection-in-asian-honey-bees-apis-cerana-cerana-and-host-immune-responses-to-the-virus-infection
#7
Liu Shan, Wang Liuhao, Guo Jun, Tang Yujie, Chen Yanping, Wu Jie, Li Jilian
Chinese Sacbrood virus (CSBV) is a positive-stranded RNAvirus that infects both the European honey bee (Apis mellifera) and the Asian honey bee (A. cerana). However, CSBV has much more devastating effects on Asian honey bees than on European honey bees, posing a serious threat to the agricultural and natural ecosystems that rely on A. cerana for pollination service. Using quantitative RT-PCR method, we conducted studies to examine the CSBV infection in Asian honey bee colonies and immune responses of individual bees in response to CSBV infection...
September 12, 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/28912256/mitochondrial-capacity-oxidative-damage-and-hypoxia-gene-expression-are-associated-with-age-related-division-of-labor-in-honey-bee-apis-mellifera-l-workers
#8
Mário S Cervoni, Carlos A M Cardoso-Júnior, Giovana Craveiro, Anderson de O Souza, Luciane C Alberici, Klaus Hartfelder
During adult life, honeybee workers undergo a succession of behavioral states. Nurses bees perform tasks inside the nest, and when they are about 2-3 weeks old they initiate foraging. This switch is associated with alterations in diet, and with the levels of juvenile hormone and vitellogenin circulating in hemolymph. Less clear is whether this behavioral maturation involves major changes at the cellular level, such as mitochondrial activity and the redox environment in the head, thorax and abdomen. Using high-resolution respirometry, biochemical assays and RT-qPCR, we evaluated the association of these parameters with this behavioral change...
September 14, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28900241/propolis-envelope-in-apis-mellifera-colonies-supports-honey-bees-against-the-pathogen-paenibacillus-larvae
#9
Renata S Borba, Marla Spivak
Honey bees have immune defenses both as individuals and as a colony (e.g., individual and social immunity). One form of honey bee social immunity is the collection of antimicrobial plant resins and the deposition of the resins as a propolis envelope within the nest. In this study, we tested the effects of the propolis envelope as a natural defense against Paenibacillus larvae, the causative agent of American foulbrood (AFB) disease. Using colonies with and without a propolis envelope, we quantified: 1) the antimicrobial activity of larval food fed to 1-2 day old larvae; and 2) clinical signs of AFB...
September 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28898772/are-pesticide-residues-in-honey-related-to-oilseed-rape-treatments
#10
Reet Karise, Risto Raimets, Vadims Bartkevics, Iveta Pugajeva, Priit Pihlik, Indrek Keres, Ingrid H Williams, Haldja Viinalass, Marika Mänd
Pesticide treatments before and during the flowering of honey bee forage crops may lead to residues in honey. In northern regions oilseed rape belongs to the main forage crops that is mostly cultivated by means of intensive agriculture, including several pesticide treatments. However, in addition to the focal forage crops, pesticides from non-forage crops can spread to wild flowers around fields, and thus the residues in honey would reflect the whole range of pesticides used in the agricultural landscape. The aim of our study was to clarify which currently used pesticides are present in honey gathered from heterogeneous agricultural landscapes after the end of flowering of oilseed crops...
September 4, 2017: Chemosphere
https://www.readbyqxmd.com/read/28892305/high-level-resistance-of-melissococcus-plutonius-clonal-complex-3-strains-to-antimicrobial-activity-of-royal-jelly
#11
Daisuke Takamatsu, Aya Osawa, Keiko Nakamura, Mikio Yoshiyama, Masatoshi Okura
Melissococcus plutonius is the causative agent of European foulbrood of honey bee larvae. Among its three genetically distinct groups (CC3, CC12, and CC13), CC3 strains have been suggested to be more virulent at the colony level. Honey bee larvae are fed royal or worker jellies by adult bees, and these jellies exhibit antimicrobial activity. Since M. plutonius orally infects larvae via brood food, we herein investigated the resistance of M. plutonius to the antimicrobial activity of royal jelly (RJ). The results obtained revealed that M...
September 11, 2017: Environmental Microbiology Reports
https://www.readbyqxmd.com/read/28889990/glandular-sources-of-pheromones-used-to-control-host-workers-apis-mellifera-scutellata-by-socially-parasitic-workers-of-apis-mellifera-capensis
#12
Olabimpe O Okosun, Christian W W Pirk, Robin M Crewe, Abdullahi A Yusuf
Pheromonal control by the honey bee queen is achieved through the use of secretions from diverse glandular sources, but the use of pheromones from a variety of glandular sources by reproductively dominant workers, has not previously been explored. Using the social parasite, Apis mellifera capensis clonal worker we studied the diversity of glandular sources used for pheromonal control of reproductively subordinate A. m. scutellata workers. To determine whether pheromones from different glandular sources are used by reproductively active workers to achieve dominance and evaluate the degree of pheromonal competition between workers of the two sub-species, we housed groups of workers of the two sub-species together in cages and analysed mandibular and tergal gland secretions as well as, ovarian activation status of each worker after 21days...
September 7, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/28889361/brevibacillus-laterosporus-isolated-from-the-digestive-tract-of-honeybees-has-high-antimicrobial-activity-and-promotes-growth-and-productivity-of-honeybee-s-colonies
#13
Jamal M Khaled, Fahd A Al-Mekhlafi, Ramzi A Mothana, Naiyf S Alharbi, Khalid E Alzaharni, Anwar H Sharafaddin, Shine Kadaikunnan, Ahmed S Alobaidi, Noofal I Bayaqoob, Marimuthu Govindarajan, Giovanni Benelli
The development of novel antimicrobial drugs, as well as the discovery of novel compounds able to promote honeybee's growth, represents major challenges for modern entomology. The main aim of this study was to investigate whether Brevibacillus laterosporus isolated from the digestive tract of Saudi honeybees, Apis mellifera, was able to stimulate colony strength parameters of honeybees and to evaluate its ability to produce antimicrobial agents. Honeybees were collected in Dirab, Riyadh Region, Saudi Arabia, and microorganisms were isolated and identified by 16S ribosomal RNA analysis...
September 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28887455/neonicotinoids-act-like-endocrine-disrupting-chemicals-in-newly-emerged-bees-and-winter-bees
#14
Danica Baines, Emily Wilton, Abbe Pawluk, Michael de Gorter, Nora Chomistek
Accumulating evidence suggests that neonicotinoids may have long-term adverse effects on bee health, yet our understanding of how this could occur is incomplete. Pesticides can act as endocrine disrupting chemicals (EDCs) in animals providing characteristic multiphasic dose-response curves and non-lethal endpoints in toxicity studies. However, it is not known if neonicotinoids act as EDCs in bees. To address this issue, we performed oral acute and chronic toxicity studies including concentrations recorded in nectar and pollen, applying acetamiprid, clothianidin, imidacloprid, and thiamethoxam to bumble bees, honey bees and leafcutter bees, the three most common bee species managed for pollination...
September 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28883629/reply-to-pitfalls-of-using-confocal-microscopy-based-automated-quantification-of-synaptic-complexes-in-honeybee-mushroom-bodies-response-to-peng-and-yang-2016
#15
Yi-Chan Peng, En-Cheng Yang
In a comment on our Article "Sublethal Dosage of Imidacloprid Reduces the Microglomerular Density of Honey Bee Mushroom Bodies", Rössler et al. assert that our reported counts are overall lower than previously reported due to the use of automated quantification. We address these issues in this reply.
September 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28883425/computational-genome-wide-survey-of-odorant-receptors-from-two-solitary-bees-dufourea-novaeangliae-hymenoptera-halictidae-and-habropoda-laboriosa-hymenoptera-apidae
#16
Snehal D Karpe, Surbhi Dhingra, Axel Brockmann, R Sowdhamini
Olfactory/odorant receptors (ORs) probably govern eusocial behaviour in honey bees through detection of cuticular hydrocarbons (CHCs) and queen mandibular gland pheromones (QMP). CHCs are involved in nest-mate recognition whereas QMP acts as sex pheromone for drones and as retinue pheromone for female workers. Further studies on the effect of eusociality on the evolution of ORs are hindered by the non-availability of comprehensive OR sets of solitary species. We report complete OR repertoires from two solitary bees Dufourea novaeangliae (112 ORs) and Habropoda laboriosa (151 ORs)...
September 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28881240/concentration-and-movement-of-neonicotinoids-as-particulate-matter-downwind-during-agricultural-practices-using-air-samplers-in-southwestern-ontario-canada
#17
Luis Gabriel Forero, Victor Limay-Rios, Yingen Xue, Arthur Schaafsma
Atmospheric emissions of neonicotinoid seed treatment insecticides as particulate matter in field crops occur mainly for two reasons: 1) due to abraded dust of treated seed generated during planting using vacuum planters, and 2) as a result of disturbances (tillage or wind events) in the surface of parental soils which release wind erodible soil-bound residues. In the present study, concentration and movement of neonicotinoids as particulate matter were quantified under real conditions using passive and active air samplers...
August 25, 2017: Chemosphere
https://www.readbyqxmd.com/read/28878743/characterization-of-the-copy-number-and-variants-of-deformed-wing-virus-dwv-in-the-pairs-of-honey-bee-pupa-and-infesting-varroa-destructor-or-tropilaelaps-mercedesae
#18
Yunfei Wu, Xiaofeng Dong, Tatsuhiko Kadowaki
Recent honey bee colony losses, particularly during the winter, have been shown to be associated with the presence of both ectoparasitic mites and Deformed Wing Virus (DWV). Whilst the role of Varroa destructor mites as a viral vector is well established, the role of Tropilaelaps mercedesae mites in viral transmission has not been fully investigated. In this study, we tested the effects that V. destructor and T. mercedesae infestation have on fluctuation of the DWV copy number and alteration of the virus variants in honey bees by characterizing individual pupae and their infesting mites...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28878636/do-insects-have-emotions-some-insights-from-bumble-bees
#19
David Baracchi, Mathieu Lihoreau, Martin Giurfa
While our conceptual understanding of emotions is largely based on human subjective experiences, research in comparative cognition has shown growing interest in the existence and identification of "emotion-like" states in non-human animals. There is still ongoing debate about the nature of emotions in animals (especially invertebrates), and certainly their existence and the existence of certain expressive behaviors displaying internal emotional states raise a number of exciting and challenging questions. Interestingly, at least superficially, insects (bees and flies) seem to fulfill the basic requirements of emotional behavior...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28877227/hemocyte-mediated-phagocytosis-differs-between-honey-bee-apis-mellifera-worker-castes
#20
Eva Marit Hystad, Heli Salmela, Gro Vang Amdam, Daniel Münch
Honey bees as other insects rely on the innate immune system for protection against diseases. The innate immune system includes the circulating hemocytes (immune cells) that clear pathogens from hemolymph (blood) by phagocytosis, nodulation or encapsulation. Honey bee hemocyte numbers have been linked to hemolymph levels of vitellogenin. Vitellogenin is a multifunctional protein with immune-supportive functions identified in a range of species, including the honey bee. Hemocyte numbers can increase via mitosis, and this recruitment process can be important for immune system function and maintenance...
2017: PloS One
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