Einfluss Der Parasitierung Durch Die Milbe Varroa Jacobsoni Oud. Auf Das Schlupfgewicht, Die Gewichtsentwicklung, Die Entwicklung Der Hypopharynxdrüsen Und Die Lebensdauer Von Apis Mellifera L.

Schneider, Pctra; Drescher, W.

doi:10.1051/apido:19870108

Cited by 86 publications

(45 citation statements)

References 1 publication

(2 reference statements)

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“…scutellata workers and other sub-species at emergence (Hrassnigg and Crailsheim, 2005 In this and other studies, the weight of drones and workers decreased as the number of foundresses as well as the total number of mites increased (De Jong et al 1982;Schneider and Drescher, 1987;Bowen-Walker and Gunn, 2001;Duay et al 2003;Annoscia et al 2012). A comparison between the degree of weight reduction between mite infested and uninfested individuals of surviving and susceptible honeybee populations is given in Table 1.…”

Section: Effect Of Varroa Parasitism On the Physiological Parameters supporting

confidence: 52%

“…This is unexpected since African drones are smaller than their European counterparts and should thus suffer proportionally greater haemolymph loss (Bowen-Walker and Gunn, 2001) than larger individuals. A lower effect due to infestation by 1-3 mites described by Schneider and Drescher (1987) constitutes an exception to this trend and suggests that there is no consistent evidence for higher tolerance in A. m.…”

Section: Effect Of Varroa Parasitism On the Physiological Parameters mentioning

confidence: 89%

“…Varroa mites reduced the lifespan and flight ability of European worker honeybees (Schneider and Drescher, 1987;Kralj and Fuchs, 2006;Annoscia et al 2012), while Varroa infested drones were found to produce less sperm and did not perform as well during flight (Duay et al 2002). Alaux et al (2011) andvan Dooremalen et al (2013) found that individuals that had been parasitised by Varroa mites and given pollen as adults were unable to compensate for the damage inflicted by mites during their pupal development, thus likely affecting their performance.…”

Section: Effect Of Varroa Parasitism On the Physiological Parameters mentioning

confidence: 99%

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Resistance rather than tolerance explains survival of savannah honeybees (Apis mellifera scutellata) to infestation by the parasitic mite Varroa destructor

et al. 2015

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SUMMARYVarroa destructor is considered the most damaging parasite affecting honeybees (Apis mellifera L.). However, some honeybee populations such as the savannah honeybee (A. m. scutellata) can survive mite infestation without treatment. It is unclear if survival is due to resistance mechanisms decreasing parasite reproduction or to tolerance mechanisms decreasing the detrimental effects of mites on the host. This study investigates both aspects by quantifying the reproductive output of V. destructor and its physiological costs at the individual host level. Costs measured were not consistently lower when compared to susceptible honeybee populations, indicating a lack of tolerance. In contrast, reproduction of V. destructor mites was distinctly lower than in susceptible populations. There was a higher proportion of infertile individuals and the reproductive success of fertile mites was lower than measured to date, even in surviving populations. Our results suggest that survival of savannah honeybees is based on resistance rather than tolerance to this parasite. We identified traits that may be useful for breeding programs aimed at increasing the survival of susceptible populations. African honeybees may have benefited from a lack of human interference, allowing natural selection to shape a population of honeybees that is more resistant to Varroa mite infestation.2

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Section: Effect Of Varroa Parasitism On the Physiological Parameters supporting

confidence: 52%

Section: Effect Of Varroa Parasitism On the Physiological Parameters mentioning

confidence: 89%

Section: Effect Of Varroa Parasitism On the Physiological Parameters mentioning

confidence: 99%

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Resistance rather than tolerance explains survival of savannah honeybees (Apis mellifera scutellata) to infestation by the parasitic mite Varroa destructor

et al. 2015

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“…V. destructor mites have a preference for drone brood due to the longer post-capping stage, which allows for the production of a higher number of mated daughter mites (Fuchs 1990). Physiological parameters, flight behaviour and longevity of honeybees infested with mites during development or as adults can be negatively affected (Schneider and Drescher 1987 Even though most of these viruses are present in Africa (see Section 3.3), there have been no reports of high colony losses directly linked to V. destructor mites and/or viruses Pirk et al 2014). The survival of African honey bee colon ies in the presence of V. destructor , without chemical treatment, suggests that honeybees may not be as threatened in Africa or more resistant compared with other parts of the world.…”

Section: Parasitic Mitesmentioning

confidence: 99%

Honeybee health in Africa—a review

Pirk¹,

Strauss²,

Yusuf³

et al. 2015

Apidologie

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-Honeybee (Apis mellifera L.) pathogens and parasites and the negative effects thereof on honeybee populations remain an issue of public concern and the subject of active research. Africa with its high genetic diversity of honeybee sub-species and large wild population is also exposed to various factors responsible for colony losses in other parts of the world. Apart from the current American foulbrood epidemic in the Western Cape of South Africa, no large-scale colony losses have been reported elsewhere on the continent. We discuss the presence of pathogens, parasites, pests and predators of African honeybees as well as the threats they face in relation to habitat changes arising from the impact of increased human populations. In addition, we discuss current efforts aimed at protecting and promoting the health of African honeybees.honeybees / Africa / honeybee health / pathogens / parasites / pests / predators / habitat loss

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“…The daily amount of hemolymph that a mite con-sumes from a bee (0.25 μL according to Moritz [86]) probably does not have a negative effect on an otherwise healthy bee. Bees infested with multiple mites during their metamorphosis show degenerated fat bodies, underdeveloped hypopharyngeal glands and a shortened lifespan [7,34,110,111]. In addition, secondary infections (viruses and bacteria) can be transferred by the mite or triggered in the bees' body and are the primary cause of bee mortality in colonies severely infested with V. jacobsoni [1,4,5,23,55,56,59,94,95,113].…”

Section: Introductionmentioning

confidence: 99%