Hygienic and grooming behaviors in African and European honeybees-New damage categories in Varroa destructor.

Varroa destructor is an ectoparasitic pest of honeybees, and a threat to the survival of the apiculture industry. Several studies have shown that unlike European honeybees, African honeybee populations appear to be minimally affected when attacked by this mite. However, little is known about the und...

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Main Authors: Beatrice T Nganso, Ayuka T Fombong, Abdullahi A Yusuf, Christian W W Pirk, Charles Stuhl, Baldwyn Torto
Format: Article
Language:English
Published: Public Library of Science (PLoS) 2017-01-01
Series:PLoS ONE
Online Access:https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0179329&type=printable
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author Beatrice T Nganso
Ayuka T Fombong
Abdullahi A Yusuf
Christian W W Pirk
Charles Stuhl
Baldwyn Torto
author_facet Beatrice T Nganso
Ayuka T Fombong
Abdullahi A Yusuf
Christian W W Pirk
Charles Stuhl
Baldwyn Torto
author_sort Beatrice T Nganso
collection DOAJ
description Varroa destructor is an ectoparasitic pest of honeybees, and a threat to the survival of the apiculture industry. Several studies have shown that unlike European honeybees, African honeybee populations appear to be minimally affected when attacked by this mite. However, little is known about the underlying drivers contributing to survival of African honeybee populations against the mite. We hypothesized that resistant behavioral defenses are responsible for the survival of African honeybees against the ectoparasite. We tested this hypothesis by comparing grooming and hygienic behaviors in the African savannah honeybee Apis mellifera scutellata in Kenya and A. mellifera hybrids of European origin in Florida, USA against the mite. Grooming behavior was assessed by determining adult mite infestation levels, daily mite fall per colony and percentage mite damage (as an indicator of adult grooming rate), while hygienic behavior was assessed by determining the brood removal rate after freeze killing a section of the brood. Our results identified two additional undescribed damaged mite categories along with the six previously known damage categories associated with the grooming behavior of both honeybee subspecies. Adult mite infestation level was approximately three-fold higher in A. mellifera hybrids of European origin than in A. m. scutellata, however, brood removal rate, adult grooming rate and daily natural mite fall were similar in both honeybee subspecies. Unlike A. mellifera hybrids of European origin, adult grooming rate and brood removal rate did not correlate with mite infestation levels on adult worker honeybee of A. m. scutellata though they were more aggressive towards the mites than their European counterparts. Our results provide valuable insights into the tolerance mechanisms that contribute to the survival of A. m. scutellata against the mite.
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spelling doaj.art-af5ce57967ba4c679156f3016fe5f0052025-02-27T05:38:46ZengPublic Library of Science (PLoS)PLoS ONE1932-62032017-01-01126e017932910.1371/journal.pone.0179329Hygienic and grooming behaviors in African and European honeybees-New damage categories in Varroa destructor.Beatrice T NgansoAyuka T FombongAbdullahi A YusufChristian W W PirkCharles StuhlBaldwyn TortoVarroa destructor is an ectoparasitic pest of honeybees, and a threat to the survival of the apiculture industry. Several studies have shown that unlike European honeybees, African honeybee populations appear to be minimally affected when attacked by this mite. However, little is known about the underlying drivers contributing to survival of African honeybee populations against the mite. We hypothesized that resistant behavioral defenses are responsible for the survival of African honeybees against the ectoparasite. We tested this hypothesis by comparing grooming and hygienic behaviors in the African savannah honeybee Apis mellifera scutellata in Kenya and A. mellifera hybrids of European origin in Florida, USA against the mite. Grooming behavior was assessed by determining adult mite infestation levels, daily mite fall per colony and percentage mite damage (as an indicator of adult grooming rate), while hygienic behavior was assessed by determining the brood removal rate after freeze killing a section of the brood. Our results identified two additional undescribed damaged mite categories along with the six previously known damage categories associated with the grooming behavior of both honeybee subspecies. Adult mite infestation level was approximately three-fold higher in A. mellifera hybrids of European origin than in A. m. scutellata, however, brood removal rate, adult grooming rate and daily natural mite fall were similar in both honeybee subspecies. Unlike A. mellifera hybrids of European origin, adult grooming rate and brood removal rate did not correlate with mite infestation levels on adult worker honeybee of A. m. scutellata though they were more aggressive towards the mites than their European counterparts. Our results provide valuable insights into the tolerance mechanisms that contribute to the survival of A. m. scutellata against the mite.https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0179329&type=printable
spellingShingle Beatrice T Nganso
Ayuka T Fombong
Abdullahi A Yusuf
Christian W W Pirk
Charles Stuhl
Baldwyn Torto
Hygienic and grooming behaviors in African and European honeybees-New damage categories in Varroa destructor.
PLoS ONE
title Hygienic and grooming behaviors in African and European honeybees-New damage categories in Varroa destructor.
title_full Hygienic and grooming behaviors in African and European honeybees-New damage categories in Varroa destructor.
title_fullStr Hygienic and grooming behaviors in African and European honeybees-New damage categories in Varroa destructor.
title_full_unstemmed Hygienic and grooming behaviors in African and European honeybees-New damage categories in Varroa destructor.
title_short Hygienic and grooming behaviors in African and European honeybees-New damage categories in Varroa destructor.
title_sort hygienic and grooming behaviors in african and european honeybees new damage categories in varroa destructor
url https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0179329&type=printable
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