Insectes Sociaux - 2005
№3 pp. 222 - 230
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"Insectes sociaux", Муравьиные НОВОСТИ: Виды-2005 и 2004,
Статьи-2005 и 2004
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Добавлено 24-10-2005
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"Insectes Sociaux",
Международный союз исследователей общественных насекомых
(International Union for the Study of Social Insects - IUSSI)
2005, Volume 52, Issue 3, Pages 222 - 230
№3
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| Статьи о муравьях |
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H. Feldhaar, B. Fiala and J. Gadau
A shift in colony founding behaviour in the obligate plant-ant Crematogaster (Decacrema) morphospecies 2
"Insectes Sociaux", 2005, Volume 52, Issue 3, pp. 222 - 230
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A shift in colony founding behaviour from single queen (haplometrosis) to multiple queens (pleometrosis) was observed locally in the obligate plant-ant Crematogaster (Decacrema) morphospecies 2, which is associated with Macaranga trees in Borneo. In addition, about a quarter of all mature colonies (27 of 95 trees examined) were found to be multiple queen colonies. They arose either directly from pleometrotic founding colonies or secondarily by adoption of additional queens. Using microsatellite markers, we showed that queens in colonies founded through pleometrosis are unrelated and each queen participates in producing worker offspring, albeit with significant skew in a third of the colonies. In mature polygynous colonies, all resident queens contributed to the production of workers and sexual offspring. Relatedness of queens in mature polygynous colonies was not significantly higher than in foundress associations. We hypothesize that increased nest site limitation in this specific interaction trigger the observed shift in colony founding behaviour. Crematogaster msp. 2 inhabits the light demanding pioneer plant species Macaranga pearsonii that is typical for early successional stages of secondary forests. Thus suitable host-plants for colonisation are abundant for only a short time in highly disturbed sites and become increasingly sparse when secondary forest matures.
H. Feldhaar1, 2 , B. Fiala2 and J. Gadau1
(1) Department of Sociobiology and Behavioural Physiology (Zoology II), Biocenter, University of Wurzburg, Am Hubland, 97074 Wurzburg, Germany
(2) Department of Animal Ecology and Tropical Biology (Zoology III), Biocenter, University of Wurzburg, Am Hubland, 97074 Wurzburg, Germany
Email:feldhaar@biozentrum.uni-wuerzburg.de
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©2005, Vladislav Krasilnikov (translation & supplement)
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