Abstract
Udgivelsesdato: August, 2005
| Originalsprog | Engelsk |
|---|---|
| Tidsskrift | Insectes Sociaux |
| Vol/bind | 52 |
| Udgave nummer | 3 |
| Sider (fra-til) | 298-303 |
| ISSN | 0020-1812 |
| DOI | |
| Status | Udgivet - 2005 |
Bibliografisk note
Key words. Encapsulation - immunocompetence - Metarhizium - Acromyrmex - haploid susceptibility hypothesisAdgang til dokumentet
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Examination of the immune responses of males and workers of the leaf-cutting ant Acromyrmex echinatior and the effect of infection. / Baer, Boris; Krug, A.; Boomsma, Jacobus Jan; Hughes, William Owen Hamar.
I: Insectes Sociaux, Bind 52, Nr. 3, 2005, s. 298-303.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review
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TY - JOUR
T1 - Examination of the immune responses of males and workers of the leaf-cutting ant Acromyrmex echinatior and the effect of infection
AU - Baer, Boris
AU - Krug, A.
AU - Boomsma, Jacobus Jan
AU - Hughes, William Owen Hamar
N1 - Key words. Encapsulation - immunocompetence - Metarhizium - Acromyrmex - haploid susceptibility hypothesis
PY - 2005
Y1 - 2005
N2 - Parasites represent significant challenges to social insects. The high density, interaction rate and relatedness of individuals within colonies are all predicted to make social insect colonies particularly vulnerable to parasites. To cope with this pressure, social insects have evolved a number of defence mechanisms. These include the immune response, which, aside from in bumblebees, has been relatively little studied in social insects. Here we compare the immune responses of males and workers of the leaf-cutting ant Acromyrmex echinatior and examine the effect upon immunocompetence of prior exposure to a virulent parasite. Males have a far lower immune response than workers, suggesting either haploid susceptibility or reduced investment in immunity by the short-lived males. There was also significantly less variation in the immune response of males than of workers, which may be due to leaf-cutting ant workers being more variable in age or more genetically diverse within colonies. When exposed to the entomopathogenic fungus Metarhizium, workers expressed a substantially reduced immune response 96 h after infection, suggesting that the immune system was either depleted by having to respond to the Metarhizium infection or was depressed by the parasite. The results suggest that the immune response is a costly and limited process, but further experiments are needed to distinguish between the alternative explanations for the effects observed.
AB - Parasites represent significant challenges to social insects. The high density, interaction rate and relatedness of individuals within colonies are all predicted to make social insect colonies particularly vulnerable to parasites. To cope with this pressure, social insects have evolved a number of defence mechanisms. These include the immune response, which, aside from in bumblebees, has been relatively little studied in social insects. Here we compare the immune responses of males and workers of the leaf-cutting ant Acromyrmex echinatior and examine the effect upon immunocompetence of prior exposure to a virulent parasite. Males have a far lower immune response than workers, suggesting either haploid susceptibility or reduced investment in immunity by the short-lived males. There was also significantly less variation in the immune response of males than of workers, which may be due to leaf-cutting ant workers being more variable in age or more genetically diverse within colonies. When exposed to the entomopathogenic fungus Metarhizium, workers expressed a substantially reduced immune response 96 h after infection, suggesting that the immune system was either depleted by having to respond to the Metarhizium infection or was depressed by the parasite. The results suggest that the immune response is a costly and limited process, but further experiments are needed to distinguish between the alternative explanations for the effects observed.
U2 - 10.1007/s00040-005-0809-x
DO - 10.1007/s00040-005-0809-x
M3 - Journal article
VL - 52
SP - 298
EP - 303
JO - Insectes Sociaux
JF - Insectes Sociaux
SN - 0020-1812
IS - 3
ER -