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  Subjects -> BIOLOGY (Total: 3041 journals)
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BIOLOGY (1442 journals)                  1 2 3 4 5 6 7 8 | Last

Showing 1 - 200 of 1720 Journals sorted alphabetically
AAPS Journal     Hybrid Journal   (Followers: 22)
Achievements in the Life Sciences     Open Access   (Followers: 4)
ACS Synthetic Biology     Full-text available via subscription   (Followers: 23)
Acta Biologica Colombiana     Open Access   (Followers: 7)
Acta Biologica Hungarica     Full-text available via subscription   (Followers: 4)
Acta Biologica Sibirica     Open Access  
Acta Biomaterialia     Hybrid Journal   (Followers: 26)
Acta Biotheoretica     Hybrid Journal   (Followers: 4)
Acta Chiropterologica     Full-text available via subscription   (Followers: 6)
acta ethologica     Hybrid Journal   (Followers: 4)
Acta Limnologica Brasiliensia     Open Access   (Followers: 3)
Acta Médica Costarricense     Open Access   (Followers: 2)
Acta Musei Silesiae, Scientiae Naturales : The Journal of Silesian Museum in Opava     Open Access  
Acta Neurobiologiae Experimentalis     Open Access  
Acta Parasitologica     Hybrid Journal   (Followers: 10)
Acta Scientiarum. Biological Sciences     Open Access   (Followers: 2)
Acta Scientifica Naturalis     Open Access   (Followers: 2)
Actualidades Biológicas     Open Access   (Followers: 1)
Advanced Health Care Technologies     Open Access   (Followers: 4)
Advanced Studies in Biology     Open Access  
Advances in Antiviral Drug Design     Full-text available via subscription   (Followers: 4)
Advances in Bioinformatics     Open Access   (Followers: 20)
Advances in Biological Regulation     Hybrid Journal   (Followers: 4)
Advances in Biosensors and Bioelectronics     Open Access   (Followers: 7)
Advances in Cell Biology     Open Access   (Followers: 25)
Advances in Cellular and Molecular Biology of Membranes and Organelles     Full-text available via subscription   (Followers: 13)
Advances in Developmental Biology     Full-text available via subscription   (Followers: 12)
Advances in DNA Sequence-Specific Agents     Full-text available via subscription   (Followers: 6)
Advances in Ecological Research     Full-text available via subscription   (Followers: 47)
Advances in Environmental Sciences - International Journal of the Bioflux Society     Open Access   (Followers: 21)
Advances in Enzyme Research     Open Access   (Followers: 9)
Advances in Experimental Biology     Full-text available via subscription   (Followers: 9)
Advances in Genome Biology     Full-text available via subscription   (Followers: 11)
Advances in High Energy Physics     Open Access   (Followers: 19)
Advances in Human Biology     Open Access   (Followers: 2)
Advances in Life Science and Technology     Open Access   (Followers: 14)
Advances in Life Sciences     Open Access   (Followers: 6)
Advances in Marine Biology     Full-text available via subscription   (Followers: 16)
Advances in Molecular and Cell Biology     Full-text available via subscription   (Followers: 23)
Advances in Organ Biology     Full-text available via subscription   (Followers: 2)
Advances in Planar Lipid Bilayers and Liposomes     Full-text available via subscription   (Followers: 3)
Advances in Regenerative Biology     Open Access   (Followers: 1)
Advances in Space Biology and Medicine     Full-text available via subscription   (Followers: 5)
Advances in Structural Biology     Full-text available via subscription   (Followers: 8)
Advances in Virus Research     Full-text available via subscription   (Followers: 6)
African Journal of Range & Forage Science     Hybrid Journal   (Followers: 6)
AFRREV STECH : An International Journal of Science and Technology     Open Access   (Followers: 1)
Ageing Research Reviews     Hybrid Journal   (Followers: 9)
Aging Cell     Open Access   (Followers: 11)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat     Open Access  
AJP Cell Physiology     Full-text available via subscription   (Followers: 14)
AJP Endocrinology and Metabolism     Full-text available via subscription   (Followers: 23)
AJP Lung Cellular and Molecular Physiology     Full-text available via subscription   (Followers: 3)
Al-Kauniyah : Jurnal Biologi     Open Access  
Alasbimn Journal     Open Access   (Followers: 1)
AMB Express     Open Access   (Followers: 1)
Ambix     Hybrid Journal   (Followers: 3)
American Biology Teacher     Full-text available via subscription   (Followers: 13)
American Fern Journal     Full-text available via subscription   (Followers: 1)
American Journal of Agricultural and Biological Sciences     Open Access   (Followers: 10)
American Journal of Bioethics     Hybrid Journal   (Followers: 10)
American Journal of Human Biology     Hybrid Journal   (Followers: 13)
American Journal of Medical and Biological Research     Open Access   (Followers: 8)
American Journal of Plant Sciences     Open Access   (Followers: 18)
American Journal of Primatology     Hybrid Journal   (Followers: 15)
American Malacological Bulletin     Full-text available via subscription   (Followers: 3)
American Naturalist     Full-text available via subscription   (Followers: 74)
Amphibia-Reptilia     Hybrid Journal   (Followers: 6)
Anaerobe     Hybrid Journal   (Followers: 4)
Analytical Methods     Full-text available via subscription   (Followers: 11)
Anatomical Science International     Hybrid Journal   (Followers: 2)
Animal Cells and Systems     Hybrid Journal   (Followers: 4)
Annales de Limnologie - International Journal of Limnology     Hybrid Journal   (Followers: 1)
Annales françaises d'Oto-rhino-laryngologie et de Pathologie Cervico-faciale     Full-text available via subscription   (Followers: 3)
Annales Henri Poincaré     Hybrid Journal   (Followers: 3)
Annales UMCS, Biologia     Open Access   (Followers: 1)
Annals of Applied Biology     Hybrid Journal   (Followers: 7)
Annals of Biomedical Engineering     Hybrid Journal   (Followers: 18)
Annals of Human Biology     Hybrid Journal   (Followers: 5)
Annual Review of Biomedical Engineering     Full-text available via subscription   (Followers: 14)
Annual Review of Biophysics     Full-text available via subscription   (Followers: 23)
Annual Review of Cancer Biology     Full-text available via subscription   (Followers: 1)
Annual Review of Cell and Developmental Biology     Full-text available via subscription   (Followers: 37)
Annual Review of Food Science and Technology     Full-text available via subscription   (Followers: 16)
Annual Review of Genomics and Human Genetics     Full-text available via subscription   (Followers: 22)
Annual Review of Phytopathology     Full-text available via subscription   (Followers: 10)
Anthropological Review     Open Access   (Followers: 24)
Anti-Infective Agents     Hybrid Journal   (Followers: 3)
Antibiotics     Open Access   (Followers: 9)
Antioxidants     Open Access   (Followers: 4)
Antioxidants & Redox Signaling     Hybrid Journal   (Followers: 9)
Antonie van Leeuwenhoek     Hybrid Journal   (Followers: 5)
Anzeiger für Schädlingskunde     Hybrid Journal   (Followers: 1)
Apidologie     Hybrid Journal   (Followers: 4)
Apmis     Hybrid Journal   (Followers: 1)
APOPTOSIS     Hybrid Journal   (Followers: 8)
Applied Bionics and Biomechanics     Open Access   (Followers: 8)
Applied Vegetation Science     Full-text available via subscription   (Followers: 9)
Aquaculture Environment Interactions     Open Access   (Followers: 2)
Aquaculture International     Hybrid Journal   (Followers: 22)
Aquaculture Reports     Open Access   (Followers: 3)
Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society     Open Access   (Followers: 6)
Aquatic Biology     Open Access   (Followers: 5)
Aquatic Ecology     Hybrid Journal   (Followers: 32)
Aquatic Ecosystem Health & Management     Hybrid Journal   (Followers: 14)
Aquatic Science and Technology     Open Access   (Followers: 3)
Aquatic Toxicology     Hybrid Journal   (Followers: 21)
Archaea     Open Access   (Followers: 3)
Archiv für Molluskenkunde: International Journal of Malacology     Full-text available via subscription   (Followers: 3)
Archives of Biomedical Sciences     Open Access   (Followers: 7)
Archives of Microbiology     Hybrid Journal   (Followers: 8)
Archives of Natural History     Hybrid Journal   (Followers: 8)
Archives of Oral Biology     Hybrid Journal   (Followers: 2)
Archives of Virology     Hybrid Journal   (Followers: 5)
Archivum Immunologiae et Therapiae Experimentalis     Hybrid Journal   (Followers: 2)
Arid Ecosystems     Hybrid Journal   (Followers: 3)
Arquivos do Instituto Biológico     Open Access   (Followers: 1)
Arquivos do Museu Dinâmico Interdisciplinar     Open Access  
Arthropod Structure & Development     Hybrid Journal   (Followers: 2)
Arthropods     Open Access   (Followers: 1)
Artificial DNA: PNA & XNA     Hybrid Journal   (Followers: 3)
Artificial Photosynthesis     Open Access   (Followers: 1)
Asian Bioethics Review     Full-text available via subscription   (Followers: 2)
Asian Journal of Biodiversity     Open Access   (Followers: 5)
Asian Journal of Biological Sciences     Open Access   (Followers: 3)
Asian Journal of Cell Biology     Open Access   (Followers: 6)
Asian Journal of Developmental Biology     Open Access   (Followers: 2)
Asian Journal of Medical and Biological Research     Open Access   (Followers: 2)
Asian Journal of Nematology     Open Access   (Followers: 4)
Asian Journal of Poultry Science     Open Access   (Followers: 4)
Australian Life Scientist     Full-text available via subscription   (Followers: 2)
Australian Mammalogy     Hybrid Journal   (Followers: 6)
Autophagy     Hybrid Journal   (Followers: 2)
Avian Biology Research     Full-text available via subscription   (Followers: 5)
Avian Conservation and Ecology     Open Access   (Followers: 13)
Bacteriology Journal     Open Access   (Followers: 2)
Bacteriophage     Full-text available via subscription   (Followers: 4)
Bangladesh Journal of Bioethics     Open Access  
Bangladesh Journal of Plant Taxonomy     Open Access  
Bangladesh Journal of Scientific Research     Open Access   (Followers: 2)
Berita Biologi     Open Access   (Followers: 1)
Between the Species     Open Access   (Followers: 1)
Bio Tribune Magazine     Hybrid Journal  
BIO Web of Conferences     Open Access  
BIO-Complexity     Open Access  
Bio-Grafía. Escritos sobre la Biología y su enseñanza     Open Access  
Bioanalytical Reviews     Hybrid Journal   (Followers: 2)
Biocatalysis and Biotransformation     Hybrid Journal   (Followers: 6)
Biochemistry and Cell Biology     Hybrid Journal   (Followers: 14)
Biochimie     Hybrid Journal   (Followers: 7)
BioControl     Hybrid Journal   (Followers: 5)
Biocontrol Science and Technology     Hybrid Journal   (Followers: 5)
Biodemography and Social Biology     Hybrid Journal   (Followers: 1)
BioDiscovery     Open Access   (Followers: 2)
Biodiversity : Research and Conservation     Open Access   (Followers: 29)
Biodiversity and Natural History     Open Access   (Followers: 6)
Biodiversity Data Journal     Open Access   (Followers: 3)
Biodiversity Informatics     Open Access   (Followers: 1)
Biodiversity Information Science and Standards     Open Access  
Bioedukasi : Jurnal Pendidikan Biologi FKIP UM Metro     Open Access  
Bioeksperimen : Jurnal Penelitian Biologi     Open Access  
Bioelectrochemistry     Hybrid Journal   (Followers: 2)
Bioelectromagnetics     Hybrid Journal   (Followers: 1)
Bioenergy Research     Hybrid Journal   (Followers: 2)
Bioengineering and Bioscience     Open Access   (Followers: 1)
BioEssays     Hybrid Journal   (Followers: 10)
Bioethics     Hybrid Journal   (Followers: 14)
BioéthiqueOnline     Open Access  
Biofabrication     Hybrid Journal   (Followers: 3)
Biogeosciences (BG)     Open Access   (Followers: 10)
Biogeosciences Discussions (BGD)     Open Access   (Followers: 1)
Bioinformatics     Hybrid Journal   (Followers: 287)
Bioinformatics and Biology Insights     Open Access   (Followers: 15)
Bioinspiration & Biomimetics     Hybrid Journal   (Followers: 7)
Biointerphases     Open Access   (Followers: 1)
Biojournal of Science and Technology     Open Access  
Biologia     Hybrid Journal  
Biologia on-line : Revista de divulgació de la Facultat de Biologia     Open Access  
Biological Bulletin     Partially Free   (Followers: 5)
Biological Control     Hybrid Journal   (Followers: 4)
Biological Invasions     Hybrid Journal   (Followers: 17)
Biological Journal of the Linnean Society     Hybrid Journal   (Followers: 18)
Biological Letters     Open Access   (Followers: 5)
Biological Procedures Online     Open Access  
Biological Psychiatry     Hybrid Journal   (Followers: 45)
Biological Psychology     Hybrid Journal   (Followers: 6)
Biological Research     Open Access  
Biological Rhythm Research     Hybrid Journal   (Followers: 2)
Biological Theory     Hybrid Journal   (Followers: 2)
Biological Trace Element Research     Hybrid Journal  
Biologicals     Full-text available via subscription   (Followers: 9)
Biologics: Targets & Therapy     Open Access   (Followers: 1)
Biologie Aujourd'hui     Full-text available via subscription  
Biologie in Unserer Zeit (Biuz)     Hybrid Journal   (Followers: 41)
Biologija     Open Access  
Biology     Open Access   (Followers: 5)
Biology and Philosophy     Hybrid Journal   (Followers: 17)
Biology Bulletin     Hybrid Journal   (Followers: 1)
Biology Bulletin Reviews     Hybrid Journal  

        1 2 3 4 5 6 7 8 | Last

Journal Cover Apidologie
  [SJR: 1.14]   [H-I: 57]   [4 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 0044-8435 - ISSN (Online) 1297-9678
   Published by Springer-Verlag Homepage  [2355 journals]
  • Wax gland size according to worker age in Friesella schrottkyi
    • Authors: Cíntia Eleonora Lopes Justino; Fernando Barbosa Noll; Sidnei Mateus; Johan Billen
      Abstract: Wax production is one of the stingless bee activities that is related with nest building. We studied wax gland size in workers of the stingless bee Friesella schrottkyi at nine different ages: 0, 4, 5, 8, 10, 13, 14, 15, and 20 days. In the large majority of workers, we observed a conspicuous epithelium in abdominal tergites III, IV, and V. Our results clearly show a link between worker age and wax production in F. schrottkyi. The epithelial thickness reaches its maximum after 13 days, followed by a drastic decline in workers of 15 days old. We observed an unexpected pattern in a minority of workers, however, which showed a decline in epithelial thickness right after emergence. Even though temporal polyethism is well known in Meliponini, some individuals may not perform all the activities inside the colony; therefore, the workers with the unexpected pattern may correspond to those individuals.
      PubDate: 2018-01-31
      DOI: 10.1007/s13592-018-0561-7
       
  • Morphological, chemical, and molecular analyses differentiate populations
           of the subterranean nesting stingless bee Mourella caerulea (Apidae:
           Meliponini)
    • Authors: Juliana S. Galaschi-Teixeira; Tiago Falcon; Maria Juliana Ferreira-Caliman; Sidia Witter; Tiago Maurício Francoy
      Abstract: To characterize the populational diversity of Mourella caerulea, an endemic stingless bee from the Pampa biome, we collected workers of the stingless bee Mourella caerulea from 24 colonies of five localities in Southern Brazil and analyzed it using geometric morphometrics of forewings, mtDNA cytochrome oxidase I variability, and cuticular hydrocarbon (CHC) chemical analysis. The morphometric analysis discriminated the populations of M. caerulea from different physiographic regions. There was a positive correlation between morphometric and geographic distances. CHC profiles also differentiated the colonies from different localities. We found six particular haplotypes, nucleotide diversity (π) of 0.01631, and a haplotype diversity (Hd) of 0.74. In this sense, the comparison of the population belonging to different physiographic regions indicates that we need to give particular attention to M. caerulea at the moment of creating conservation strategies for South Brazilian Fauna, once it is the only species of this monospecific genus, and its populations are much differentiated from each other.
      PubDate: 2018-01-31
      DOI: 10.1007/s13592-018-0563-5
       
  • Queen mandibular pheromone modulates hemolymph ecdysteroid titers in adult
           Apis mellifera workers
    • Authors: Ashton M. Trawinski; Susan E. Fahrbach
      Abstract: To test the hypothesis that exposure to queen mandibular pheromone (QMP) modulates ecdysteroid production in adult worker honey bees, ecdysteroids were measured in hemolymph and other tissues of individual adult worker honey bees reared with or without QMP in cages and field colonies. Ecdysteroid titers were higher in caged workers exposed to QMP continuously from the first day of adult life than in workers reared without QMP. Statistical cluster analysis suggested the possibility that a subgroup of workers (“responders”) is more sensitive to QMP in this regard than other workers. In 12-day-old workers, ecdysteroid titers in workers reared in queenright (QR) colonies were similar to those observed in cages with QMP, but lower than those in queenless (QL) colonies. Differences in number of ovarioles or degree of ovarian activation did not correlate with hemolymph ecdysteroids. Previous studies have demonstrated ecdysteroids in hemolymph in very young adult workers and in workers in QL colonies; the present study indicates that production of ecdysteroids occurs in older adult worker honey bees in the absence of morphological signs of ovarian activation, with cage studies revealing a modulatory role for QMP masked in the complex environment of the hive.
      PubDate: 2018-01-31
      DOI: 10.1007/s13592-018-0562-6
       
  • Molecular signatures of phenotypic and behavioral plasticity in bees
    • Authors: Klaus Hartfelder
      PubDate: 2018-01-11
      DOI: 10.1007/s13592-017-0560-0
       
  • Honey bees performing varroa sensitive hygiene remove the most
           mite-compromised bees from highly infested patches of brood
    • Authors: Seo Hyun KIM; Fanny MONDET; Maxime HERVÉ; Alison MERCER
      Abstract: Varroa destructor is a key contributor to honey bee (Apis mellifera L.) colony losses that threaten global economies. Some colonies, especially those displaying high levels of hygiene behaviour targeted towards V. destructor-infested cells, survive mite infestation. Worker bees displaying varroa sensitive hygiene (VSH) open infested brood cells and remove the contents, thereby suppressing mite reproduction. This study identifies features that distinguish cells uncapped by bees performing VSH from infested cells that VSH bees ignore. Brood cells targeted and uncapped by VSH bees were found to be more likely to contain multiple foundress females than non-targeted cells. They also contained higher numbers of mite offspring, and lay within brood cell patches that were more highly infested with V. destructor than were the surrounds of infested cells ignored by VSH bees. This study is the first to identify cell surrounds as a potential source of signals influencing the behaviour of bees performing VSH.
      PubDate: 2018-01-04
      DOI: 10.1007/s13592-017-0559-6
       
  • Circadian clock genes are differentially modulated during the daily cycles
           and chronological age in the social honeybee ( Apis mellifera )
    • Authors: Fabiano C. P. Abreu; Flávia C. P. Freitas; Zilá L. P. Simões
      Abstract: The circadian clock is an advantageous adaptive system that enables organisms to predict and anticipate the daily environmental changes. The circadian rhythms are generated molecularly through the expression of clock genes, based on autoregulatory feedback loops. Honeybees are an excellent model to investigate how the circadian rhythms are modulated accordingly to the social context, behavioral plasticity, and task-related activities. Here, we show how the clock genes behave during the daily cycles in adult worker heads of Apis mellifera. Our results point to the clock genes period and cryptochrome as essential regulators of the circadian rhythms associated to the behavioral maturation in this social insect. We also identified putative miRNA-target and protein-protein interactions involving honeybee clock genes, indicating regulatory networks behind the adjustment of the molecular clock.
      PubDate: 2018-01-02
      DOI: 10.1007/s13592-017-0558-7
       
  • Mitochondrial sequencing and geometric morphometrics suggest two clades in
           the Tetragonilla collina (Apidae: Meliponini) population of Thailand
    • Authors: Atsalek Rattanawannee; Ekgachai Jeratthitikul; Orawan Duangpakdee; Benjamin P. Oldroyd
      Pages: 719 - 731
      Abstract: The stingless bee Tetragonilla collina Smith, 1857, is broadly distributed across Indochina. In this study, we use a combination of molecular and geometric morphometric analyses to quantify the genetic structure and diversity of the T. collina population of Thailand. We found striking regional differences in both mitochondrial haplotype frequencies and morphology. A Bayesian analyses of molecular diversity of the mitochondrial COI region revealed two clades, roughly divided into the population northeast of the Thai-Malay Peninsula (clade A) and the western and Thai-Malay Peninsula population (clade B). In addition, morphometric analysis showed that bees in clade A have significantly larger wings than bees from clade B. These results suggest that the T. collina population of Thailand is divided into two distinct populations. The spatial distributions seem to reflect contemporary ecological features such as annual flooding (bees of clade B are absent from areas subject to inundation), rather than past biogeography. Thus, T. collina differs from the honey bees Apis dorsata and A. cerana that show genetic differentiation north and south of the Isthmus of Kra, perhaps reflective of past separation during the Pleistocene when sea levels were much higher.
      PubDate: 2017-12-01
      DOI: 10.1007/s13592-017-0517-3
      Issue No: Vol. 48, No. 6 (2017)
       
  • Honey bee pathogens in Ghana and the presence of contaminated beeswax
    • Authors: Miguel Llorens-Picher; Mariano Higes; Raquel Martín-Hernández; Pilar De la Rúa; Irene Muñoz; Kwame Aidoo; Eric Obeng Bempong; Faustina Polkuraf; Aránzazu Meana
      Pages: 732 - 742
      Abstract: A nationwide survey was performed to study the distribution of parasites, pathogens and pesticides in managed honey bee populations in Ghana. When 45 colonies were sampled and inspected for signs of disease, Varroa destructor was the most prevalent parasite (89%; n = 40), all mites corresponding to the Korean haplotype of this pathogen. Aethina tumida (42%; n = 19) and Braula coeca (7%; n = 3) were also detected, as were Melissococcus plutonius and trypanosomatids (7%). By contrast, Nosema spp., Acarapis spp., Ascosphaera apis and Paenibacillus larvae were not detected by molecular screening. Amitraz was the most widely distributed pesticide (75%; n = 23) followed by coumaphos (47%; n = 15), chlorpyrifos (34%; n = 15) and fluvalinate (31%; n = 10). This survey lays the groundwork for further monitoring of honey bee populations in Ghana.
      PubDate: 2017-12-01
      DOI: 10.1007/s13592-017-0518-2
      Issue No: Vol. 48, No. 6 (2017)
       
  • Life-history traits of wild honey bee colonies living in forests around
           Ithaca, NY, USA
    • Authors: Thomas D. Seeley
      Pages: 743 - 754
      Abstract: Wild honey bee colonies—both truly wild (in trees and buildings) and simulated wild (in small hives)—were studied to determine their life-history traits, to see if these traits have changed now that these colonies are infested with Varroa destructor. Most colonies (97%) survive summers, but only 23% of founder (first-year) colonies and 84% of established colonies survive winters. Established colonies have a mean lifespan of 5–6 years and most (87%) have a queen turnover (probably by swarming) each summer. A population model shows that these life-history traits produce a stable population of colonies. Remarkably, the suite of colony life-history traits found in the 2010s (with V. destructor) matches that found in the 1970s (without V. destructor). It seems likely that the wild colonies living near Ithaca, NY, possess defenses against V. destructor that are not costly.
      PubDate: 2017-12-01
      DOI: 10.1007/s13592-017-0519-1
      Issue No: Vol. 48, No. 6 (2017)
       
  • Apitoxin harvest impairs hypopharyngeal gland structure in Apis mellifera
           honey bees
    • Authors: Thaís S. Bovi; Paula Onari; Sérgio A. A. Santos; Luis A. Justulin; Ricardo O. Orsi
      Pages: 755 - 760
      Abstract: Apitoxin harvesting is a stressful practice for honey bees Apis mellifera L. due to the release of alarm pheromones that alter communication and behaviour and may also affect their physiology. Thus, the goal of this research was to verify the effects of apitoxin harvesting on the development of the hypopharyngeal glands (HGs), evaluating the number and area of acini. For this, ten beehives were subjected to one of two treatments: T1, without apitoxin harvest and T2, with apitoxin harvested by an electric collector. We collected ten 6-day-old honey bees in each treatment once every month (October through December). The HGs were removed and were processed for morphological-stereological analysis. The worker bees from hives subjected to treatment T2 showed a smaller acinar area and lower number of acini than those from hives subjected to treatment T1. Thus, apitoxin harvest negatively affects the structure of the hypopharyngeal glands, consequently affecting the production of royal jelly.
      PubDate: 2017-12-01
      DOI: 10.1007/s13592-017-0520-8
      Issue No: Vol. 48, No. 6 (2017)
       
  • Aging results in a decline in cellular energy metabolism in the
           trophocytes and oenocytes of worker honeybees ( Apis mellifera )
    • Authors: Cheng-Yen Lu; Yu-Lung Chuang; Chin-Yuan Hsu
      Pages: 761 - 775
      Abstract: Trophocytes and oenocytes of honeybees are used in studies of cellular senescence, but their cellular energy metabolism with age is poorly understood. In this study, the molecules involved in cellular energy metabolism were evaluated in the trophocytes and oenocytes of young and old worker bees. The results revealed that (i) β-oxidation and protein synthesis decreased with age, (ii) fat and glycogen accumulation increased with age, and (iii) glycolysis did not change with age. These results indicate that the trophocytes and oenocytes of young bees have higher activity of cellular energy metabolism compared with old worker bees and that aging results in a decline in the cellular energy metabolism of worker bees.
      PubDate: 2017-12-01
      DOI: 10.1007/s13592-017-0521-7
      Issue No: Vol. 48, No. 6 (2017)
       
  • An abbreviated SNP panel for ancestry assignment of honeybees ( Apis
           mellifera )
    • Authors: Nadine C. Chapman; A. Lelania Bourgeois; Lorraine D. Beaman; Julianne Lim; Brock A. Harpur; Amro Zayed; Michael H. Allsopp; Thomas E. Rinderer; Benjamin P. Oldroyd
      Pages: 776 - 783
      Abstract: We examine whether a panel of 37 single nucleotide polymorphisms (SNPs) has the same power as a more expensive panel of 95 SNPs to assign ancestry of honeybees (Apis mellifera) to three ancestral lineages. We selected SNPs using allele frequencies, such that poorly performing SNPs were excluded. We find that ancestry assignment is comparable between the two panels. Importation of bee semen from countries where Africanized bees are present into countries where Africanized bees are absent would be facilitated if small proportions of semen derived from Africanized drones can be reliably detected. We used the abbreviated panel to determine if semen from a single Africanized drone could be detected when mixed with the semen of 10, 20 or 40 non-Africanized drones. We found that the use of the 37 SNP test on a mixed sample would fail to detect the contribution of a single Africanized male. It is therefore important that the cadavers of the males contributing semen are individually tested.
      PubDate: 2017-12-01
      DOI: 10.1007/s13592-017-0522-6
      Issue No: Vol. 48, No. 6 (2017)
       
  • Protecting a managed bee pollinator against climate change: strategies for
           an area with extreme climatic conditions and socioeconomic vulnerability
    • Authors: Tereza C. Giannini; Camila Maia-Silva; Andre L. Acosta; Rodolfo Jaffé; Airton T. Carvalho; Celso F. Martins; Fernando C. V. Zanella; Carlos A. L. Carvalho; Michael Hrncir; Antonio M. Saraiva; José Oswaldo Siqueira; Vera L. Imperatriz-Fonseca
      Pages: 784 - 794
      Abstract: In the semiarid region of Northeastern Brazil, populations of native bees can be jeopardized by future climate change. The present study aims to analyze the impact of climate change on a native stingless bee (Melipona subnitida Ducke). This species is a locally important pollinator of wild and crop plants, also exploited for honey production by regional beekeepers. Using species distributional modeling, we assessed the effects of climate change on the geographic distribution of M. subnitida. We found a potential shift in future areas where species can find climatically suitable habitats toward the edges of the current pollinator distribution with a consequent central disconnection, which can threaten species dispersal and gene flow. We propose to reconnect the remaining suitable areas through conservation and restoration programs based on the distribution of the plant species that are used by this bee as source of pollen and nectar and propose also, other strategies that aim to increase the welfare of local people
      PubDate: 2017-12-01
      DOI: 10.1007/s13592-017-0523-5
      Issue No: Vol. 48, No. 6 (2017)
       
  • Accessing the genetic content of Xylocopa frontalis bees (Apidae,
           Xylocopini) for sustainable management in pollination services of passion
           fruit
    • Authors: Jayça Amate Marim Toledo; Camila Nonato Junqueira; Solange Cristina Augusto; Maria Cristina Arias; Rute Magalhães Brito
      Pages: 795 - 805
      Abstract: The commercial use of pollinators can be beneficial to many crops. In the case of passion fruit, the supply of nests of Xylocopa frontalis in crop areas was shown to be effective for the improvement of the production and quality of fruits, but little is known about how the manipulation of native bees could change the genetic patrimony of local populations. The aim of this study was to describe the genetic composition of X. frontalis bees attracted to two agroecosystems, one natural reserve and one urban area based on mitochondrial DNA (partial sequencing of the gene cytochrome oxidase I) and microsatellite markers. One of the study areas comprised most of the exclusive haplotypes (50%); however, the microsatellite data showed no structuring between areas. Based on our data, we suggest a plan for exchanging nests of X. frontalis to passion fruit areas taking into account the genetic composition of local populations, avoiding then disturbances to their natural genetic patrimony.
      PubDate: 2017-12-01
      DOI: 10.1007/s13592-017-0524-4
      Issue No: Vol. 48, No. 6 (2017)
       
  • Pollen preferences among the bee species visiting apple ( Malus pumila )
           in New York
    • Authors: Laura Russo; Bryan Danforth
      Pages: 806 - 820
      Abstract: Maintaining a diverse and abundant wild bee community is essential for sustainable agricultural pollination, especially in crops in which wild bees are effective pollinators. Many land managers have an economic interest in encouraging healthy wild bee populations, but it is not always clear how to accomplish this. In apple orchards, wild bees play a critical role as pollinators, but are active before most forbs begin to flower. To investigate which flowering plant species might serve as alternative pollen hosts for the most abundant wild bee species collected in eastern apple orchards, we analyzed the pollen carried by 15 wild bee species and 1 managed bee species (Apis mellifera) collected during apple bloom. We identified the pollen grains carried by these bees and found that the majority of alternative pollen hosts for apple visitors are early blooming tree species, including six other tree genera. This may partly explain why the presence of forest fragments is an important predictor of bee abundance and species richness in New York apple orchards.
      PubDate: 2017-12-01
      DOI: 10.1007/s13592-017-0525-3
      Issue No: Vol. 48, No. 6 (2017)
       
  • Brood removal or queen caging combined with oxalic acid treatment to
           control varroa mites ( Varroa destructor ) in honey bee colonies ( Apis
           mellifera )
    • Authors: Aleš Gregorc; Mohamed Alburaki; Chris Werle; Patricia R. Knight; John Adamczyk
      Pages: 821 - 832
      Abstract: Few studies of honey bee colonies exist where varroa mite control is achieved by integrating broodless conditions, through either total brood removal or queen caging, in combination with oxalic acid (OA) applications. We observed significant varroa mortality after total brood removal or caging the queens and OA applications in broodless colonies, as well as in colonies with brood that received four consecutive OA applications. In laboratory tests, we recorded higher mortality of caged bees exposed to Apistan® compared to oxalic acid or untreated control bees. However, this mortality is not believed to negatively impact the colony. We therefore recommend combining OA applications with artificial broodless colony conditions achieved either by brood removal or queen caging as an effective management strategy for varroa mites.
      PubDate: 2017-12-01
      DOI: 10.1007/s13592-017-0526-2
      Issue No: Vol. 48, No. 6 (2017)
       
  • Tolerance of honey bee adults and larvae toward tyrothricin peptides
           derived from Brevibacillus parabrevis
    • Authors: J. Arnold Vosloo; Hannes Beims; Michael H. Allsopp; Wilma van Rensburg; Werner von der Ohe; Michael Steinert; Marina Rautenbach
      Pages: 833 - 844
      Abstract: Tyrothricin is a peptide complex containing the linear gramicidins and cyclic tyrocidines. The tyrocidines have potent activity against fungal plant pathogens. As these peptides have possible agricultural applications, their toxicity was evaluated toward honey bee adults and larvae. Tyrothricin formulated in sucrose was non-toxic to caged adult honey bees at up to 1.5 g/L over 48-h exposure, which is 100- to 200-fold higher than the amount needed to eradicate high fungal loads (2 × 104 spores/mL). Moreover, tyrothricin and the tyrocidines displayed potent in vitro activity toward foulbrood causing pathogens (Paenibacillus larvae, Melissococcus plutonius, Paenibacillus alvei) in honey bee larvae. In vivo tyrothricin or tyrocidine treatment delayed infection onset, indicating potential for curing. Tyrothricin was also found to be non-toxic with possible protective action in a semi-field trial on young bees released into hives, indicating the relative safety of the application of these antimicrobial peptides in an agricultural setting.
      PubDate: 2017-12-01
      DOI: 10.1007/s13592-017-0528-0
      Issue No: Vol. 48, No. 6 (2017)
       
  • Effects of queen mating status, pre-diapause weight and pupae’s sex on
           colony initiation in small-scale rearing of Bombus terrestris
    • Authors: Gherardo Bogo; Natasha de Manincor; Alessandro Fisogni; Marta Galloni; Laura Bortolotti
      Pages: 845 - 854
      Abstract: Diapause control and colony initiation are among the major problems encountered in the rearing of bumble bee colonies in small-scale rearing. In this study, we used Bombus terrestris queens obtained from commercial colonies to investigate (1) the diapause survival in virgin and mated queens, (2) the diapause and colony initiation performance of mated bumble bee queens in relation to the pre-diapause weight and (3) the effect of pupae’s sex on colony initiation. We found that diapause survival is negatively affected by mating and by the low pre-diapause weight, but first egg deposition and development of the first adult worker were delayed in heavy queens. We found no significant differences in the egg-laying success in relation to pupae’s sex; however, queens stimulated with queen pupae laid more eggs per cell and developed a first brood larger than those stimulated with male pupae. Our results can be useful in small-scale rearing, including the rearing of wild queens for conservation purposes.
      PubDate: 2017-12-01
      DOI: 10.1007/s13592-017-0529-z
      Issue No: Vol. 48, No. 6 (2017)
       
  • Bee species recorded between 1992 and 2017 from green roofs in Asia,
           Europe, and North America, with key characteristics and open research
           questions
    • Authors: Michaela M. Hofmann; Susanne S. Renner
      Abstract: Green roofs, which have become mandatory on new flat-topped buildings in many cities, increase habitat connectivity for wildlife and have contributed to a boom in urban beekeeping. The ecological benefits or risks of green roofs for wild bees (bee species other than the domesticated honey bee, Apis mellifera), however, have not been comprehensively analyzed. We therefore reviewed studies on insects caught on green roofs in Asia, Europe, or North America between 1992 and early 2017 and extracted information on wild bees. The resulting species list includes 236 Apidae identified in 35 studies, with thermophilic species probably overrepresented because roofs provide warm and dry habitats. The percentage of cavity-nesting bees on roofs is higher than that on nearby ground, while the percentage of pollen specialists is lower. Data are almost completely lacking on the reproductive success of bees on green roofs, the effect of roof age on bee diversity, and the genetic or demographic benefits of increased habitat connectivity. Our list of the bee species so far reported on green roofs will help in the selection and implementation of suitable soils, nesting aids, and plantings.
      PubDate: 2017-12-19
      DOI: 10.1007/s13592-017-0555-x
       
  • Social response of healthy honeybees towards Nosema ceranae -infected
           workers: care or kill'
    • Authors: Sarah Biganski; Christoph Kurze; Matthias Y. Müller; Robin F. A. Moritz
      Abstract: Honeybees are living densely packed in colonies which extremely facilitates intracolonial pathogen transmission from one individual to another. In addition to the defence by the innate immune system, various behavioural adaptations allow honeybees to avoid or reduce pathogen transmission, also coined ‘social immunity’. Here, we show that infections with the intestinal parasite Nosema ceranae lead to altered behaviour going beyond a ‘care-kill dichotomy’ within the society. We show that the response of healthy workers can be highly variable ranging from avoidance to enhanced social interactions that even lead to killing of infected nestmates in some cases. These behavioural defence mechanisms may help in reducing the spread of the disease in the colony. Thus, honeybees can respond highly variable and not just with one behavioural response after recognising an infected worker even when fighting against the same parasite species.
      PubDate: 2017-12-04
      DOI: 10.1007/s13592-017-0557-8
       
 
 
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