Abstract:
:Male-killing bacteria are thought to persist in host populations by vertical transmission and conferring direct and/or indirect fitness benefits to their hosts. Here, we test the role of indirect fitness benefits accrued from resource reallocation in species that engage in sibling egg cannibalism. We found that a single-egg meal significantly increased larval survival in 12 ladybird species, but the value of an egg (to survival) differed substantially between species. Next, we tested the impact of three male-killing bacteria on larval survival in one ladybird species, Adalia bipunctata. Spiroplasma reduced larval survival, whereas Wolbachia and Rickettsia had no effect. However, Spiroplasma-infected larvae showed the greatest response to a single-egg meal. The indirect fitness benefit obtained from a single egg is thus so large that even male-killing bacteria with direct fitness costs can persist in host populations. This study supports the hypothesis that fitness compensation via resource reallocation can explain male-killing bacteria persistence.
journal_name
J Evol Bioljournal_title
Journal of evolutionary biologyauthors
Elnagdy S,Majerus ME,Handley LJdoi
10.1111/j.1420-9101.2011.02346.xsubject
Has Abstractpub_date
2011-10-01 00:00:00pages
2164-72issue
10eissn
1010-061Xissn
1420-9101journal_volume
24pub_type
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