Hovering guards of the stingless bee Tetragonisca angustula increase colony defensive perimeter as shown by intra- and inter-specific comparisons

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Version: author
Serval ID
serval:BIB_3245BEF58531
Type
Article: article from journal or magazin.
Collection
Publications
Title
Hovering guards of the stingless bee Tetragonisca angustula increase colony defensive perimeter as shown by intra- and inter-specific comparisons
Journal
Behavioral Ecology and Sociobiology
Author(s)
van Zweden J.S., Grüter C., Jones S.M., Ratnieks F.L.W.
ISSN
1432-0762 (Electronic)
ISSN-L
0340-5443 (Print)
Publication state
Published
Issued date
2011
Peer-reviewed
Oui
Volume
65
Number
6
Pages
1277-1282
Language
english
Abstract
Social insects need to defend their nest against robbery, parasitism and predation. The stingless bee Tetragonisca angustula is unique in that it has guards that hover near the nest entrance in addition to guards that stand at the entrance. We tested both the general hypothesis that hovering guards increase the effectiveness with which flying intruders are detected and the specific hypothesis that hovering guards improve the detection of workers of the obligate robber bee, Lestrimellita limao. In an intraspecific study comparing colonies, we found a strong positive relationship between the number of hovering guards and the distance at which a dummy robber bee or L. limao worker, experimentally moved towards the nest entrance, was detected. These results were mirrored in an interspecific study showing that four species of stingless bees with similar population colonies but which lacked hovering guards, detected L. limao only at the nest entrance, in contrast to T. angustula. In addition, we found that a greater number of attacks by guards occurred when dummies were impregnated with citral, a major component of L. limao mandibular gland odour. Our results support the hypothesis that T. angustula hovering guards increase the detection perimeter for flying intruders, especially L. limao.
Keywords
Nest defence, Nestmate recognition, Defensive perimeter, Robber bees, Lestrimelitta limao
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Create date
21/02/2014 10:27
Last modification date
20/08/2019 13:17
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