Africanized honey bees (Apis mellifera L.) are more efficient at removing worker brood artificially infested with the parasitic mite Varroa jacobsoni Oudemans than are Italian bees or Italian/Africanized hybrids
Africanized honey bees are more tolerant of infestations with the mite Varroa jacobsoni than are honey bees of European origin. The capacity of these bees to detect and react to brood infested with this mite could be one of the factors determining this tolerance. We tested colonies of Africanized be...
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Sociedade Brasileira de Genética
2000-03-01
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Series: | Genetics and Molecular Biology |
Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000100016 |
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Article |
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DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
José Carlos Vieira Guerra Jr. Lionel Segui Gonçalves David De Jong |
spellingShingle |
José Carlos Vieira Guerra Jr. Lionel Segui Gonçalves David De Jong Africanized honey bees (Apis mellifera L.) are more efficient at removing worker brood artificially infested with the parasitic mite Varroa jacobsoni Oudemans than are Italian bees or Italian/Africanized hybrids Genetics and Molecular Biology |
author_facet |
José Carlos Vieira Guerra Jr. Lionel Segui Gonçalves David De Jong |
author_sort |
José Carlos Vieira Guerra Jr. |
title |
Africanized honey bees (Apis mellifera L.) are more efficient at removing worker brood artificially infested with the parasitic mite Varroa jacobsoni Oudemans than are Italian bees or Italian/Africanized hybrids |
title_short |
Africanized honey bees (Apis mellifera L.) are more efficient at removing worker brood artificially infested with the parasitic mite Varroa jacobsoni Oudemans than are Italian bees or Italian/Africanized hybrids |
title_full |
Africanized honey bees (Apis mellifera L.) are more efficient at removing worker brood artificially infested with the parasitic mite Varroa jacobsoni Oudemans than are Italian bees or Italian/Africanized hybrids |
title_fullStr |
Africanized honey bees (Apis mellifera L.) are more efficient at removing worker brood artificially infested with the parasitic mite Varroa jacobsoni Oudemans than are Italian bees or Italian/Africanized hybrids |
title_full_unstemmed |
Africanized honey bees (Apis mellifera L.) are more efficient at removing worker brood artificially infested with the parasitic mite Varroa jacobsoni Oudemans than are Italian bees or Italian/Africanized hybrids |
title_sort |
africanized honey bees (apis mellifera l.) are more efficient at removing worker brood artificially infested with the parasitic mite varroa jacobsoni oudemans than are italian bees or italian/africanized hybrids |
publisher |
Sociedade Brasileira de Genética |
series |
Genetics and Molecular Biology |
issn |
1415-4757 1678-4685 |
publishDate |
2000-03-01 |
description |
Africanized honey bees are more tolerant of infestations with the mite Varroa jacobsoni than are honey bees of European origin. The capacity of these bees to detect and react to brood infested with this mite could be one of the factors determining this tolerance. We tested colonies of Africanized bees headed by queens from swarms collected in Ribeirão Preto, São Paulo State. The Italian colonies had queens imported directly from the USA, or from the Brazilian Island of Fernando de Noronha, where varroa-infested Italian colonies have been maintained, untreated, since 1984. Recently sealed worker brood cells were artificially infested by opening the cell capping, inserting live adult female mites and resealing the cells. Control cells were treated in the same way, but without introducing mites. The ability of the Africanized honey bees to recognize and remove this artificially infested brood was compared with that of first generation Italian/Africanized hybrid bees, and with the two groups of "pure" Italian bees, in three separate experiments. Africanized colonies removed a mean of 51% of the infested brood, while Italian/Africanized hybrid colonies removed 25%. Africanized colonies also removed a significantly greater proportion of infested brood than did Italian colonies, headed by queens from the USA (59 vs. 31%, respectively). Similarly, when Africanized colonies were compared with colonies of Italian bees from Fernando de Noronha, the former were found to be significantly more efficient at removing infested brood (61 vs. 35%, respectively), even though the population of Italian bees on this island has been exposed to and survived varroa infestations (without treatment) for more than 12 years. Only the Africanized honey bees removed a significant proportion of varroa-infested brood, when the data was corrected for brood removal from control cells.<br>Abelhas africanizadas são mais tolerantes à infestação com o ácaro Varroa jacobsoni do que abelhas de origem européia. A capacidade destas abelhas de detectar e reagir à cria infestada com este ácaro pode ser um dos fatores chaves que determina esta tolerância. Células de cria de operária foram infestadas artificialmente, abrindo o opérculo, inserindo ácaros fêmeas adultas vivas e selando as células. A habilidade das abelhas africanizadas de reconhecer e remover esta cria infestada artificialmente foi comparada com a de abelhas híbridas italianas/africanizadas e com dois grupos de abelhas italianas "puras", em três experimentos distintos. Rainhas italianas já fecundadas foram importadas dos EUA ou foram obtidas da ilha de Fernando de Noronha, Brasil, onde abelhas italianas são mantidas desde 1984. Colmeias africanizadas removeram em media 51% da cria infestada, enquanto colmeias híbridas italianas/africanizadas removeram 25%. Colmeias africanizadas também removeram uma proporção significativamente maior de cria infestada do que colmeias "puras" italianas com rainhas dos EUA (59 vs. 31%, respectivamente). Da mesma maneira, quando colmeias africanizadas foram comparadas com colmeias de abelhas italianas da ilha de Fernando de Noronha, as africanizadas foram significativamente mais eficientes na remoção de cria infestada (61 vs. 35%, respectivamente), apesar de que a população de abelhas italianas desta ilha foi exposta a varroa e elas sobreviveram sem tratamento durante mais de 12 anos. Somente as abelhas africanizadas removeram uma proporção significante da cria infestada com V. jacobsoni, quando os dados foram corrigidos pela taxa de remoção da cria das células controles. |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000100016 |
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doaj-5d74ab944a2b454c92679f226a2515e12020-11-25T01:56:03ZengSociedade Brasileira de GenéticaGenetics and Molecular Biology1415-47571678-46852000-03-01231899210.1590/S1415-47572000000100016Africanized honey bees (Apis mellifera L.) are more efficient at removing worker brood artificially infested with the parasitic mite Varroa jacobsoni Oudemans than are Italian bees or Italian/Africanized hybridsJosé Carlos Vieira Guerra Jr.Lionel Segui GonçalvesDavid De JongAfricanized honey bees are more tolerant of infestations with the mite Varroa jacobsoni than are honey bees of European origin. The capacity of these bees to detect and react to brood infested with this mite could be one of the factors determining this tolerance. We tested colonies of Africanized bees headed by queens from swarms collected in Ribeirão Preto, São Paulo State. The Italian colonies had queens imported directly from the USA, or from the Brazilian Island of Fernando de Noronha, where varroa-infested Italian colonies have been maintained, untreated, since 1984. Recently sealed worker brood cells were artificially infested by opening the cell capping, inserting live adult female mites and resealing the cells. Control cells were treated in the same way, but without introducing mites. The ability of the Africanized honey bees to recognize and remove this artificially infested brood was compared with that of first generation Italian/Africanized hybrid bees, and with the two groups of "pure" Italian bees, in three separate experiments. Africanized colonies removed a mean of 51% of the infested brood, while Italian/Africanized hybrid colonies removed 25%. Africanized colonies also removed a significantly greater proportion of infested brood than did Italian colonies, headed by queens from the USA (59 vs. 31%, respectively). Similarly, when Africanized colonies were compared with colonies of Italian bees from Fernando de Noronha, the former were found to be significantly more efficient at removing infested brood (61 vs. 35%, respectively), even though the population of Italian bees on this island has been exposed to and survived varroa infestations (without treatment) for more than 12 years. Only the Africanized honey bees removed a significant proportion of varroa-infested brood, when the data was corrected for brood removal from control cells.<br>Abelhas africanizadas são mais tolerantes à infestação com o ácaro Varroa jacobsoni do que abelhas de origem européia. A capacidade destas abelhas de detectar e reagir à cria infestada com este ácaro pode ser um dos fatores chaves que determina esta tolerância. Células de cria de operária foram infestadas artificialmente, abrindo o opérculo, inserindo ácaros fêmeas adultas vivas e selando as células. A habilidade das abelhas africanizadas de reconhecer e remover esta cria infestada artificialmente foi comparada com a de abelhas híbridas italianas/africanizadas e com dois grupos de abelhas italianas "puras", em três experimentos distintos. Rainhas italianas já fecundadas foram importadas dos EUA ou foram obtidas da ilha de Fernando de Noronha, Brasil, onde abelhas italianas são mantidas desde 1984. Colmeias africanizadas removeram em media 51% da cria infestada, enquanto colmeias híbridas italianas/africanizadas removeram 25%. Colmeias africanizadas também removeram uma proporção significativamente maior de cria infestada do que colmeias "puras" italianas com rainhas dos EUA (59 vs. 31%, respectivamente). Da mesma maneira, quando colmeias africanizadas foram comparadas com colmeias de abelhas italianas da ilha de Fernando de Noronha, as africanizadas foram significativamente mais eficientes na remoção de cria infestada (61 vs. 35%, respectivamente), apesar de que a população de abelhas italianas desta ilha foi exposta a varroa e elas sobreviveram sem tratamento durante mais de 12 anos. Somente as abelhas africanizadas removeram uma proporção significante da cria infestada com V. jacobsoni, quando os dados foram corrigidos pela taxa de remoção da cria das células controles.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000100016 |