We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Alate susceptibility in ants.
- Authors
Ho, Eddie K. H.; Frederickson, Megan E.
- Abstract
Pathogens are predicted to pose a particular threat to eusocial insects because infections can spread rapidly in colonies with high densities of closely related individuals. In ants, there are two major castes: workers and reproductives. Sterile workers receive no direct benefit from investing in immunity, but can gain indirect fitness benefits if their immunity aids the survival of their fertile siblings. Virgin reproductives (alates), on the other hand, may be able to increase their investment in reproduction, rather than in immunity, because of the protection they receive from workers. Thus, we expect colonies to have highly immune workers, but relatively more susceptible alates. We examined the survival of workers, gynes, and males of nine ant species collected in Peru and Canada when exposed to the entomopathogenic fungus Beauveria bassiana. For the seven species in which treatment with B. bassiana increased ant mortality relative to controls, we found workers were significantly less susceptible compared with both alate sexes. Female and male alates did not differ significantly in their immunocompetence. Our results suggest that, as with other nonreproductive tasks in ant colonies like foraging and nest maintenance, workers have primary responsibility for colony immunity, allowing alates to specialize on reproduction. We highlight the importance of colony-level selection on individual immunity in ants and other eusocial organisms.
- Subjects
MYRMECOLOGY; MYRMECOLOGISTS; INSECT societies; INSECT aggregation; COLONIES (Biology); HYMENOPTERA
- Publication
Ecology & Evolution (20457758), 2014, Vol 4, Issue 22, p4209
- ISSN
2045-7758
- Publication type
Article
- DOI
10.1002/ece3.1291