All Stories

  1. Spatio-temporal variation in pollen collected by honey bees (Apis mellifera) in rural-urban mosaic landscapes in Northern Europe

    Article • PLOS One, February 2025, PLOS

    Dr Per Kryger

  2. Conserving Locally Adapted Honey Bees

    Article • January 2025, Springer Science + Business Media

    Dr Per Kryger

  3. Drone Biology and Rearing

    Article • January 2025, Springer Science + Business Media

    Dr Per Kryger

  4. Keeping Your Breeding Colonies Healthy

    Article • January 2025, Springer Science + Business Media

    Dr Per Kryger

  5. Mating Biology

    Article • January 2025, Springer Science + Business Media

    Dr Per Kryger

  6. Mating Control

    Article • January 2025, Springer Science + Business Media

    Dr Per Kryger

  7. Phytochemical profiles of honey bees ( Apis mellifera ) and their larvae differ from the composition of their pollen diet

    Article • Royal Society Open Science, September 2024, Royal Society Publishing

    Dr Per Kryger

  8. Standard methods for rearing and selection of Apis mellifera queens 2.0

    Article • Journal of Apicultural Research, March 2024, Taylor & Francis

    Dr Per Kryger

  9. Possible Role of Geographical Location and Queen Absence on Damage of Small Hive Beetles (Aethina tumida Murray) on Honey Bee Colonies

    Article • Bee World, July 2022, Taylor & Francis

    Dr Per Kryger

  10. Complex population structure and haplotype patterns in the Western European honey bee from sequencing a large panel of haploid drones

    Article • Molecular Ecology Resources, June 2022, Wiley

    Jean-Pierre Bidanel, Dr Per Kryger, Dr Yves Le Conte

  11. Morphometric and mitochondrial variation of Apis mellifera L. and its relationship with geographical variables in parts of West and Central Africa

    Article • Journal of Apicultural Research, February 2022, Taylor & Francis

    Dr Per Kryger

  12. Population Structure and Diversity in European Honey Bees (Apis mellifera L.)—An Empirical Comparison of Pool and Individual Whole-Genome Sequencing

    Article • Genes, January 2022, MDPI AG

    Dr Per Kryger

  13. Complex population structure and haplotype patterns in Western Europe honey bee from sequencing a large panel of haploid drones

    Article • September 2021, Cold Spring Harbor Laboratory Press

    Dr Per Kryger

  14. Resistance and Vulnerability of Honeybee (Apis mellifera) Gut Bacteria to Commonly Used Pesticides

    Article • Frontiers in Microbiology, September 2021, Frontiers

    Dr Per Kryger

  15. Pollination and Plant Reproductive Success of Two Ploidy Levels in Red Clover (Trifolium pratense L.)

    Article • Frontiers in Plant Science, August 2021, Frontiers

    Dr Per Kryger

  16. Metabolomics unveils the influence of dietary phytochemicals on residual pesticide concentrations in honey bees

    Article • Environment International, July 2021, Elsevier

    Dr Per Kryger

  17. Research project on field data collection for honey bee colony model evaluation

    Article • EFSA Supporting Publications, July 2021, Wiley

    Dr Per Kryger

  18. Different pollination approaches to compare the seed set of diploid and tetraploid red clover Trifolium pratense L.

    Article • Nordic Journal of Botany, June 2021, Wiley

    Dr Per Kryger

  19. Evaluating competition for forage plants between honey bees and wild bees in Denmark

    Article • PLOS One, April 2021, PLOS

    Dr Per Kryger

  20. Review of seed yield components and pollination conditions in red clover (Trifolium pratense L.) seed production

    Article • Euphytica, March 2021, Springer Science + Business Media

    Dr Per Kryger

  21. Development and evaluation of a core genome multilocus sequence typing scheme for Paenibacillus larvae , the deadly American foulbrood pathogen of honeybees

    Article • Environmental Microbiology, March 2021, Wiley

    Dr Per Kryger

  22. Authoritative subspecies diagnosis tool for European honey bees based on ancestry informative SNPs

    Article • BMC Genomics, February 2021, Springer Science + Business Media

    Dr Per Kryger

  23. LC–MS/MS Quantification Reveals Ample Gut Uptake and Metabolization of Dietary Phytochemicals in Honey Bees (Apis mellifera)

    Article • Journal of Agricultural and Food Chemistry, January 2021, American Chemical Society (ACS)

    Dr Per Kryger

  24. Dietary quercetin impacts the concentration of pesticides in honey bees

    Article • Chemosphere, January 2021, Elsevier

    Dr Per Kryger

  25. Evaluation of Suppressed Mite Reproduction (SMR) Reveals Potential for Varroa Resistance in European Honey Bees (Apis mellifera L.)

    Article • Insects, September 2020, MDPI AG

    Dr Per Kryger

  26. Does quercetin intake alter the concentration of pesticides in honeybees?

    Article • Planta Medica, December 2019, Thieme Publishing Group

    Dr Per Kryger

  27. A computer vision system to monitor the infestation level of Varroa destructor in a honeybee colony

    Article • Computers and Electronics in Agriculture, September 2019, Elsevier

    Dr Per Kryger

  28. High sample throughput genotyping for estimating C-lineage introgression in the dark honeybee: an accurate and cost-effective SNP-based tool

    Article • Scientific Reports, June 2018, Springer Science + Business Media

    Dr Per Kryger

  29. Infection dynamics of Nosema ceranae in honey bee midgut and host cell apoptosis

    Article • Journal of Invertebrate Pathology, May 2018, Elsevier

    Dr Yves Le Conte, Dr Per Kryger

  30. Quantitative patterns of vertical transmission of deformed wing virus in honey bees

    Article • PLOS One, March 2018, PLOS

    Dr Per Kryger

  31. Trueness and precision of the real-time RT-PCR method for quantifying the chronic bee paralysis virus genome in bee homogenates evaluated by a comparative inter-laboratory study

    Article • Journal of Virological Methods, October 2017, Elsevier

    Dr Per Kryger

  32. A pan-European epidemiological study reveals honey bee colony survival depends on beekeeper education and disease control

    Article • PLOS One, March 2017, PLOS

    Dr Per Kryger

  33. Differential proteomics reveals novel insights into Nosema–honey bee interactions

    Article • Insect Biochemistry and Molecular Biology, December 2016, Elsevier

    Dr Per Kryger, Dr Yves Le Conte

  34. Label-Free Differential Proteomics and Quantification of Exoenzymes from Isolates of the Entomopathogenic Fungus Beauveria bassiana

    Article • Insects, October 2016, MDPI AG

    Dr Per Kryger

  35. Drones, sexually transmitted virus, infected queens, colony collapse

    Article • Scientific Reports, September 2016, Nature

    Dr Per Kryger

  36. Risk indicators affecting honeybee colony survival in Europe: one year of surveillance

    Article • Apidologie, May 2016, Springer Science + Business Media

    Dr Per Kryger

  37. Nosema spp. infections cause no energetic stress in tolerant honeybees

    Article • Parasitology Research, March 2016, Springer Science + Business Media

    Dr Per Kryger, Dr Yves Le Conte

  38. Automatic behaviour analysis system for honeybees using computer vision

    Article • Computers and Electronics in Agriculture, March 2016, Elsevier

    Dr Per Kryger

  39. Parasite infection accelerates age polyethism in young honey bees

    Article • Scientific Reports, February 2016, Nature

    Dr Per Kryger

  40. Determinants of nectar production in oilseed rape

    Article • Journal of Apicultural Research, January 2016, Taylor & Francis

    Dr Per Kryger

  41. Determinants of nectar production in heather

    Article • Journal of Apicultural Research, January 2016, Taylor & Francis

    Dr Per Kryger

  42. Four Categories of Viral Infection Describe the Health Status of Honey Bee Colonies

    Article • PLOS One, October 2015, PLOS

    Dr Esmaeil Amiri, Dr Per Kryger

  43. Nosema Tolerant Honeybees (Apis mellifera) Escape Parasitic Manipulation of Apoptosis

    Article • PLOS One, October 2015, PLOS

    Dr Per Kryger, Dr Yves Le Conte

  44. Effects of genotype, environment, and their interactions on honey bee health in Europe

    Article • Current Opinion in Insect Science, August 2015, Elsevier

    Dr Per Kryger

  45. Weight Watching and the Effect of Landscape on Honeybee Colony Productivity: Investigating the Value of Colony Weight Monitoring for the Beekeeping Industry

    Article • PLOS One, July 2015, PLOS

    Dr Per Kryger

  46. Reduced SNP Panels for Genetic Identification and Introgression Analysis in the Dark Honey Bee (Apis mellifera mellifera)

    Article • PLOS One, April 2015, PLOS

    Dr Per Kryger

  47. Chronic Bee Paralysis Virus in Honeybee Queens: Evaluating Susceptibility and Infection Routes

    Article • Viruses, March 2014, MDPI AG

    Dr Esmaeil Amiri, Dr Per Kryger

  48. Development and validation of a real-time two-step RT-qPCR TaqMan® assay for quantitation of Sacbrood virus (SBV) and its application to a field survey of symptomatic honey bee colonies

    Article • Journal of Virological Methods, March 2014, Elsevier

    Dr Per Kryger

  49. Towards integrated control of varroa: effect of variation in hygienic behaviour among honey bee colonies on mite population increase and deformed wing virus incidence

    Article • Journal of Apicultural Research, January 2014, Taylor & Francis

    Dr Esmaeil Amiri, Dr Per Kryger

  50. Effect of genotype and environment on parasite and pathogen levels in one apiary—a case study

    Article • Journal of Apicultural Research, January 2014, Taylor & Francis

    Dr Esmaeil Amiri, Dr Per Kryger, Dr Yves Le Conte

  51. Occurrence of parasites and pathogens in honey bee colonies used in a European genotype-environment interactions experiment

    Article • Journal of Apicultural Research, January 2014, Taylor & Francis

    Dr Esmaeil Amiri, Dr Per Kryger, Dr Yves Le Conte

  52. Detecting population admixture in honey bees of Serbia

    Article • Journal of Apicultural Research, January 2014, Taylor & Francis

    Dr Per Kryger, Dr. Ljubiša Ž. Stanisavljević

  53. A review of methods used in some European countries for assessing the quality of honey bee queens through their physical characters and the performance of their colonies

    Article • Journal of Apicultural Research, January 2014, Taylor & Francis

    Dr Per Kryger

  54. Genetic integrity of the Dark European honey bee (Apis mellifera mellifera) from protected populations: a genome-wide assessment using SNPs and mtDNA sequence data

    Article • Journal of Apicultural Research, January 2014, Taylor & Francis

    Dr Per Kryger

  55. Genetic structure of Apis mellifera macedonica in the Balkan Peninsula based on microsatellite DNA polymorphism

    Article • Journal of Apicultural Research, January 2014, Taylor & Francis

    Dr Per Kryger

  56. Honey bee genotypes and the environment

    Article • Journal of Apicultural Research, January 2014, Taylor & Francis

    Dr Per Kryger

  57. Population dynamics of European honey bee genotypes under sdifferent environmental conditions

    Article • Journal of Apicultural Research, January 2014, Taylor & Francis

    Dr Per Kryger, Dr Yves Le Conte

  58. Population-genetical characteristics of the bee population of Vojvodina

    Article • Genetika, January 2014, National Library of Serbia

    Dr Per Kryger

  59. Swarming, defensive and hygienic behaviour in honey bee colonies of different genetic origin in a pan-European experiment

    Article • Journal of Apicultural Research, January 2014, Taylor & Francis

    Dr Per Kryger, Dr Yves Le Conte

  60. The genetic origin of honey bee colonies used in the COLOSS Genotype-Environment Interactions Experiment: a comparison of methods

    Article • Journal of Apicultural Research, January 2014, Taylor & Francis

    Dr Per Kryger, Dr Yves Le Conte

  61. The influence of genetic origin and its interaction with environmental effects on the survival of Apis mellifera L. colonies in Europe

    Article • Journal of Apicultural Research, January 2014, Taylor & Francis

    Dr Per Kryger, Dr Yves Le Conte

  62. A selective sweep in a microsporidian parasiteNosema-tolerant honeybee population,Apis mellifera

    Article • Animal Genetics, December 2013, Wiley

    Prof. H. Michael G. Lattorff, Dr Per Kryger, Dr Yves Le Conte

  63. Four quantitative trait loci associated with low Nosema ceranae (Microsporidia) spore load in the honeybee Apis mellifera

    Article • Apidologie, October 2013, Springer Science + Business Media

    Prof. H. Michael G. Lattorff, Dr Per Kryger, Dr Yves Le Conte

  64. Varroa-Virus Interaction in Collapsing Honey Bee Colonies

    Article • PLOS One, March 2013, PLOS

    Dr Per Kryger

  65. Standard methods for characterising subspecies and ecotypes ofApis mellifera

    Article • Journal of Apicultural Research, January 2013, Taylor & Francis

    Dr Per Kryger

  66. Standard methods for rearing and selection ofApis melliferaqueens

    Article • Journal of Apicultural Research, January 2013, Taylor & Francis

    Dr Per Kryger

  67. Patterns of viral infection in honey bee queens

    Article • Journal of General Virology, December 2012, Society for General Microbiology

    Dr Per Kryger

  68. Polymorphic DNA sequences of the fungal honey bee pathogen Ascosphaera apis

    Article • FEMS Microbiology Letters, March 2012, Oxford University Press (OUP)

    Dr Per Kryger

  69. Survival and immune response of drones of a Nosemosis tolerant honey bee strain towards N. ceranae infections

    Article • Journal of Invertebrate Pathology, March 2012, Elsevier

    Dr Per Kryger, Dr Yves Le Conte

  70. No transmission of Potato spindle tuber viroid shown in experiments with thrips (Frankliniella occidentalis, Thrips tabaci), honey bees (Apis mellifera) and bumblebees (Bombus terrestris)

    Article • European Journal of Plant Pathology, February 2012, Springer Science + Business Media

    Dr Per Kryger

  71. Single Assay Detection of Acute Bee Paralysis Virus, Kashmir Bee Virus and Israeli Acute Paralysis Virus

    Article • Journal of Apicultural Science, January 2012, De Gruyter Open Sp. z o.o.

    Dr Per Kryger

  72. A Europe-Wide Experiment for Assessing the Impact of Genotype-Environment Interactions on the Vitality and Performance of Honey Bee Colonies: Experimental Design and Trait Evaluation

    Article • Journal of Apicultural Science, January 2012, De Gruyter Open Sp. z o.o.

    Dr Per Kryger, Dr Yves Le Conte

  73. Modelling Gene Flow between Fields of White Clover with Honeybees as Pollen Vectors

    Article • Environmental Modeling & Assessment, December 2011, Springer Science + Business Media

    Dr Per Kryger

  74. A review of methods for discrimination of honey bee populations as applied to European beekeeping

    Article • Journal of Apicultural Research, January 2011, Taylor & Francis

    Dr Per Kryger, Dr Yves Le Conte

  75. Reproductive division of labour and thelytoky result in sympatric barriers to gene flow in honeybees (Apis mellifera L.)

    Article • Journal of Evolutionary Biology, November 2010, Wiley

    Dr Per Kryger

  76. Conserving diversity and vitality for honey bee breeding

    Article • Journal of Apicultural Research, January 2010, Taylor & Francis

    Dr Per Kryger

  77. Factors involved in the recent increase in colony losses in Denmark

    Article • Journal of Apicultural Research, January 2010, Taylor & Francis

    Dr Per Kryger

  78. A scientific note on the fungus Beauveria bassiana infecting Varroa destructor in worker brood cells in honey bee hives

    Article • Apidologie, October 2009, Springer Science + Business Media

    Dr Per Kryger

  79. Phylogenetic analysis of the RNA-dependent RNA polymerase (RdRp) and a predicted structural protein (pSP) of the Chronic bee paralysis virus (CBPV) isolated from various geographic regions

    Article • Virus Research, September 2009, Elsevier

    Dr Per Kryger

  80. Outbreeding and possibly inbreeding depression in a pollinating fig wasp with a mixed mating system

    Article • Heredity, February 2009, Nature

    Dr Per Kryger

  81. Incidence of acute bee paralysis virus, black queen cell virus, chronic bee paralysis virus, deformed wing virus, Kashmir bee virus and sacbrood virus in honey bees ( Apis mellifera ) in Denmark

    Article • Apidologie, April 2008, Springer Science + Business Media

    Dr Per Kryger

  82. Widespread dispersal of the microsporidian Nosema ceranae, an emergent pathogen of the western honey bee, Apis mellifera

    Article • Journal of Invertebrate Pathology, September 2007, Elsevier

    Dr Per Kryger

  83. The size of wild honeybee populations (Apis mellifera) and its implications for the conservation of honeybees

    Article • Journal of Insect Conservation, February 2007, Springer Science + Business Media

    Dr Per Kryger

  84. Isolation of six microsatellite loci in the pollinating fig wasp, Platyscapa awekei

    Article • Molecular Ecology Notes, June 2006, Wiley

    Dr Per Kryger

  85. Infestation levels of Apis mellifera scutellata swarms by socially parasitic Cape honeybee workers ( Apis mellifera capensis )

    Article • Apidologie, March 2006, Springer Science + Business Media

    Dr Per Kryger

  86. Higher vitellogenin concentrations in honey bee workers may be an adaptation to life in temperate climates

    Article • Insectes Sociaux, November 2005, Springer Science + Business Media

    Dr Per Kryger

  87. Queen developmental time and fitness consequences for queens of clonal social parasitic honeybees (A. m. capensis) and its host A. m. scutellata

    Article • Insectes Sociaux, August 2005, Springer Science + Business Media

    Prof. H. Michael G. Lattorff, Dr Per Kryger

  88. Multiple nuptial flights, sperm transfer and the evolution of extreme polyandry in honeybee queens

    Article • Animal Behaviour, July 2005, Elsevier

    Dr Per Kryger

  89. Whole-Genome Scan in Thelytokous-Laying Workers of the Cape Honeybee (Apis mellifera capensis): Central Fusion, Reduced Recombination Rates and Centromere Mapping Using Half-Tetrad Analysis

    Article • Genetics, May 2004, Genetics Society of America

    Dr Per Kryger

  90. A scientific note on the presence of Paenibacillus larvae larvae spores in sub-Saharan African honey

    Article • Apidologie, September 2003, Springer Science + Business Media

    Dr Per Kryger

  91. Mimicry of queen Dufour's gland secretions by workers of Apis mellifera scutellata and A. m. capensis

    Article • The Science of Nature, December 2002, Springer Science + Business Media

    Dr Per Kryger

  92. Usurpation of African Apis mellifera scutellata colonies by parasitic Apis mellifera capensis workers

    Article • Apidologie, March 2002, Springer Science + Business Media

    Dr Per Kryger

  93. A method for estimating variation in the phenotypic expression of morphological characters by thelytokous parthenogenesis in Apis mellifera capensis

    Article • Apidologie, March 2002, Springer Science + Business Media

    Dr Per Kryger

  94. Reproduction of Varroa destructor in South African honey bees: does cell space influence Varroa male survivorship?

    Article • Apidologie, January 2002, Springer Science + Business Media

    Dr Per Kryger

  95. Genotypical Variability for the Tasks of Water Collecting and Scenting in a Honey Bee Colony

    Article • Ethology, September 2000, Wiley

    Dr Per Kryger

  96. Article • Nature, August 2000, Nature

    Dr Per Kryger

  97. LACK OF WORKER POLICING IN THE CAPE HONEYBEE (APIS MELLIFERA CAPENSIS)

    Article • Behaviour, January 1999, De Gruyter

    Dr Per Kryger

  98. Lack of kin recognition in swarming honeybees (  Apis mellifera  )

    Article • Behavioral Ecology and Sociobiology, April 1997, Springer Science + Business Media

    Dr Per Kryger

  99. Erratum

    Article • Nature, December 1996, Springer Science + Business Media

    Dr Per Kryger

  100. Competition for royalty in bees

    Article • Nature, November 1996, Nature

    Dr Per Kryger

  101. High degree of polyandry in Apis dorsata queens detected by DNA microsatellite variability

    Article • Behavioral Ecology and Sociobiology, November 1995, Springer Science + Business Media

    Dr Per Kryger

  102. Self-organization of circadian rhythms in groups of honeybees (Apis mellifera L.)

    Article • Behavioral Ecology and Sociobiology, March 1994, Springer Science + Business Media

    Dr Per Kryger

  103. Self-organization of circadian rhythms in groups of honeybees (Apis mellifera L.)

    Article • Behavioral Ecology and Sociobiology, March 1994, Springer Science + Business Media

    Dr Per Kryger

  104. Mitochondrial DNA variability in South African honeybees (Apis mellifera L)

    Article • Apidologie, January 1994, Springer Science + Business Media

    Dr Per Kryger

  105. The acoustic near field of a dancing honeybee

    Article • Journal of Comparative Physiology A, January 1987, Springer Science + Business Media

    Dr Per Kryger