Distribution of<i>Varroa destructor</i>between swarms and colonies

Wilde, J.; Fuchs, Stefan; Bratkowski, J.; Siuda, M.

doi:10.1080/00218839.2005.11101177

Cited by 15 publications

(12 citation statements)

References 11 publications

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“…However, as mites leave on the departing bees (Wilde et al, 2005) the fission of the colony results in a reduction of mite levels. It appears likely that the swarming behaviour of the colonies in our experiment influenced the mite levels, but the structure of our data does not allow an in-depth analysis.…”

Section: Discussionmentioning

confidence: 99%

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

Meixner

Francis²,

Gajda

et al. 2014

Journal of Apicultural Research

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SummaryDiseases are known to be one of the major contributors to colony losses. Within a Europe-wide experiment on genotype -environment interactions, an initial 621 colonies were set up and maintained from 2009 to 2012. The colonies were monitored to investigate the occurrence and levels of key pathogens. These included the mite Varroa destructor (mites per 10 g bees), Nosema spp. (spore loads and species determination), and viruses (presence/absence of acute bee paralysis virus (ABPV) and deformed wing virus (DWV)). Data from 2010 to the spring of 2011 are analysed in relation to the parameters: genotype, environment, and origin (local vs. non-local) of the colonies in the experiment. The relative importance of different pathogens as indicators of colony death within the experiment is compared. In addition, pathogen occurrence rates across the geographic locations are described. 216Meixner et al.

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Section: Discussionmentioning

confidence: 99%

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

Meixner

Francis²,

Gajda

et al. 2014

Journal of Apicultural Research

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“…It was also found in both groups that once the colonies that swarmed did so, their 48-h mite drop counts and their counts of mites/ 300 bees fell to 15-20 % of the level of the counts for the colonies that did not swarm. It seems likely that the mite infestation levels dropped markedly in the colonies that swarmed because when a colony casts a swarm, it loses 40-70 % of its worker bee population (Wilde et al 2005;Rangel and Seeley 2012), and since approximately 50 % of the mites in a colony are on the adult bees (Fuchs 1985), this means that a colony loses 20-35 % of its adult mites each time it swarms (as shown by Wilde et al 2005). Furthermore, because a swarming colony can cast multiple swarms-one Bprime swarm^and sometimes seve r a l Ba f t e r s w a r m s^( G i l l e y a n d Ta r p y 2005)-swarming can greatly reduce a colony's mite population.…”

Section: Discussionmentioning

confidence: 99%

Crowding honeybee colonies in apiaries can increase their vulnerability to the deadly ectoparasite Varroa destructor

2015

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-When humans switched from hunting honeybee colonies living scattered in the wild to keeping them in hives crowded in apiaries, they may have greatly increased disease transmission between colonies. The effects of clustering colonies were studied. Two groups of 12 colonies, with hives crowded or dispersed, were established in a common environment and left untreated for mites. Drones made many homing errors in the crowded group, but not in the dispersed group. In early summer, in both groups, the colonies that did not swarm developed high mite counts, but the colonies that swarmed maintained low mite counts. In late summer, in the crowded group but not in the dispersed group, the colonies that swarmed also developed high mite counts. All colonies with high mite counts in late summer died over winter; all colonies with low mite counts in late summer survived over winter. Evidently, swarming can reduce a colony's mite load, but when colonies are crowded in apiaries, this mite-load reduction is erased as mites are spread through drifting and robbing. apiary / Apis mellifera / crowding / drifting / evolutionary trap / parasitism / Varroa destructor

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“…Reduced colony size and brood amounts may be an adaptive strategy to limit mite reproductive opportunities and slow the mite population growth, especially considering the attractiveness of drone brood for mite reproduction (Boot et al 1993(Boot et al , 1994Calis et al 1999;Fuchs 1990;Fries et al 1994). The incidence of swarming typically causes a loss of 40-70 % of the adult worker bee population along with many of the phoretic mites followed by a broodless period when mite reproduction is restrained (Wilde et al 2005). Although swarming in the Gotland population did initially reduced mite infestations in mother colonies, it could not prevent the development of high mite levels in the autumn (Fries et al 2003).…”

Section: Gotland Swedenmentioning

confidence: 99%

Natural Varroa mite-surviving Apis mellifera honeybee populations

2015

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-The Varroa destructor mite is the largest threat to apiculture worldwide and has been responsible for devastating losses of wild honeybee populations in Europe and North America. However, Varroa mite-resistant populations of A. mellifera honeybees have been reported and documented around the world with a variety of explanations for their long-term survival with uncontrolled mite infestation. This review synthesizes the work on naturally occurring survival to Varroa mites and discusses what these honeybee populations can signify for apiculture.Varroa destructor / mite resistance / host-parasite adaptations / natural selection / apiculture

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Distribution ofVarroa destructorbetween swarms and colonies

Cited by 15 publications

References 11 publications

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

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

Crowding honeybee colonies in apiaries can increase their vulnerability to the deadly ectoparasite Varroa destructor

Natural Varroa mite-surviving Apis mellifera honeybee populations

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