A comparison of the hygienic response of Africanized and European (Apis mellifera carnica) honey bees to Varroa-infested brood in tropical Brazil

In order to examine the significance of hygienic behavior for the tolerance to varroosis of Africanized honey bees, they were compared with non-tolerant Carniolans in tropical Brazil. Capped worker brood cells were artificially infested with living Varroa mites, and inspected some days later. Uncapp...

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Main Authors: Pia Aumeier, Peter Rosenkranz, Lionel Segui Gonçalves
Format: Article
Language:English
Published: Sociedade Brasileira de Genética 2000-12-01
Series:Genetics and Molecular Biology
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000400013
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spelling doaj-01ba8d56ca96401cb8ce05c0fb3ba50e2020-11-25T03:35:26ZengSociedade Brasileira de GenéticaGenetics and Molecular Biology1415-47571678-46852000-12-0123478779110.1590/S1415-47572000000400013A comparison of the hygienic response of Africanized and European (Apis mellifera carnica) honey bees to Varroa-infested brood in tropical BrazilPia AumeierPeter RosenkranzLionel Segui GonçalvesIn order to examine the significance of hygienic behavior for the tolerance to varroosis of Africanized honey bees, they were compared with non-tolerant Carniolans in tropical Brazil. Capped worker brood cells were artificially infested with living Varroa mites, and inspected some days later. Uncapping, disappearance of the introduced mite and removal of the pupa were recorded in a total of manipulated 3,096 cells during three summer seasons. The hygienic response varied between Africanized and Carniolan colonies, but this difference was significant only in one year, during which Africanized honey bees removed a significantly greater proportion of Varroa mites than European honey bees. A high proportion of the mites disappeared from artificially infested brood cells without damage to the pupae. The opening of the cell and the removal of the bee brood are independent traits of a graded response by adult workers towards mite-infested brood cells. We found a higher between-colony variation in the reaction towards Varroa-infested brood of Africanized honey bees compared to Carniolans. The overall similar response of the two bee types indicates that hygienic behavior is not a key factor in the tolerance to varroosis of Africanized bees in Brazil.<br>Com o intuito de examinar o significado do comportamento higiênico na tolerância à varroose de abelhas africanizadas, elas foram comparadas com as não tolerantes Cárnicas no Brasil tropical. Células de cria de operárias operculadas foram artificialmente infestadas com ácaros Varroa vivos e inspecionadas alguns dias depois. Desoperculação, desaparecimento dos ácaros introduzidos e remoção da pupa foram anotados em um total de 3096 células manipuladas durante três verões. A resposta higiênica variou entre as colônias africanizadas e de Cárnicas, mas esta diferença foi significante apenas em um ano, durante o qual as abelhas africanizadas removeram uma proporção significantemente maior de ácaros Varroa que as abelhas européias. Uma grande porporção de ácaros desapareceram das células das crias artificialmente infestadas, sem danos às pupas. A abertura da célula e remoção das crias das abelhas são características independentes de uma resposta graduada por parte de operárias adultas com relação a células de crias infestadas por ácaros. Nós encontramos uma variação maior entre colônias na reação de abelhas africanizadas à cria infestada por Varroa, quando comparadas a abelhas Cárnicas. A resposta geralmente similar dos dois tipos de abelhas indica que o comportamento higiênico não é um fator importante na tolerância à varroose de abelhas africanizadas no Brasil.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000400013
collection DOAJ
language English
format Article
sources DOAJ
author Pia Aumeier
Peter Rosenkranz
Lionel Segui Gonçalves
spellingShingle Pia Aumeier
Peter Rosenkranz
Lionel Segui Gonçalves
A comparison of the hygienic response of Africanized and European (Apis mellifera carnica) honey bees to Varroa-infested brood in tropical Brazil
Genetics and Molecular Biology
author_facet Pia Aumeier
Peter Rosenkranz
Lionel Segui Gonçalves
author_sort Pia Aumeier
title A comparison of the hygienic response of Africanized and European (Apis mellifera carnica) honey bees to Varroa-infested brood in tropical Brazil
title_short A comparison of the hygienic response of Africanized and European (Apis mellifera carnica) honey bees to Varroa-infested brood in tropical Brazil
title_full A comparison of the hygienic response of Africanized and European (Apis mellifera carnica) honey bees to Varroa-infested brood in tropical Brazil
title_fullStr A comparison of the hygienic response of Africanized and European (Apis mellifera carnica) honey bees to Varroa-infested brood in tropical Brazil
title_full_unstemmed A comparison of the hygienic response of Africanized and European (Apis mellifera carnica) honey bees to Varroa-infested brood in tropical Brazil
title_sort comparison of the hygienic response of africanized and european (apis mellifera carnica) honey bees to varroa-infested brood in tropical brazil
publisher Sociedade Brasileira de Genética
series Genetics and Molecular Biology
issn 1415-4757
1678-4685
publishDate 2000-12-01
description In order to examine the significance of hygienic behavior for the tolerance to varroosis of Africanized honey bees, they were compared with non-tolerant Carniolans in tropical Brazil. Capped worker brood cells were artificially infested with living Varroa mites, and inspected some days later. Uncapping, disappearance of the introduced mite and removal of the pupa were recorded in a total of manipulated 3,096 cells during three summer seasons. The hygienic response varied between Africanized and Carniolan colonies, but this difference was significant only in one year, during which Africanized honey bees removed a significantly greater proportion of Varroa mites than European honey bees. A high proportion of the mites disappeared from artificially infested brood cells without damage to the pupae. The opening of the cell and the removal of the bee brood are independent traits of a graded response by adult workers towards mite-infested brood cells. We found a higher between-colony variation in the reaction towards Varroa-infested brood of Africanized honey bees compared to Carniolans. The overall similar response of the two bee types indicates that hygienic behavior is not a key factor in the tolerance to varroosis of Africanized bees in Brazil.<br>Com o intuito de examinar o significado do comportamento higiênico na tolerância à varroose de abelhas africanizadas, elas foram comparadas com as não tolerantes Cárnicas no Brasil tropical. Células de cria de operárias operculadas foram artificialmente infestadas com ácaros Varroa vivos e inspecionadas alguns dias depois. Desoperculação, desaparecimento dos ácaros introduzidos e remoção da pupa foram anotados em um total de 3096 células manipuladas durante três verões. A resposta higiênica variou entre as colônias africanizadas e de Cárnicas, mas esta diferença foi significante apenas em um ano, durante o qual as abelhas africanizadas removeram uma proporção significantemente maior de ácaros Varroa que as abelhas européias. Uma grande porporção de ácaros desapareceram das células das crias artificialmente infestadas, sem danos às pupas. A abertura da célula e remoção das crias das abelhas são características independentes de uma resposta graduada por parte de operárias adultas com relação a células de crias infestadas por ácaros. Nós encontramos uma variação maior entre colônias na reação de abelhas africanizadas à cria infestada por Varroa, quando comparadas a abelhas Cárnicas. A resposta geralmente similar dos dois tipos de abelhas indica que o comportamento higiênico não é um fator importante na tolerância à varroose de abelhas africanizadas no Brasil.
url http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000400013
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