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A halictid bee with sympatric solitary and eusocial nests offers evidence for Hamilton's rule

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Title: A halictid bee with sympatric solitary and eusocial nests offers evidence for Hamilton's rule
Authors: Yagi, Norihiro Browse this author
Hasegawa, Eisuke Browse this author →KAKEN DB
Keywords: Hamilton's rule
Kin selection
Inclusive fitness
Social bee
Issue Date: 3-Jul-2012
Publisher: Nature Publishing Group
Journal Title: Nature Communications
Volume: 3
Start Page: 939
Publisher DOI: 10.1038/ncomms1939
PMID: 22760638
Abstract: The validity of Hamilton's rule has been confirmed among cooperative breeders where helping behaviour is transient; however, Hamilton's rule has not been validated among eusocial insects where helpers commit for life. Here we conducted a direct test of Hamilton's rule using field populations of Lasioglossum baleicum bees with sympatric solitary and eusocial nests. Our results show the following: 1. The indirect fitness of sterile first-brood workers is higher than the direct fitness of solitary first-brood females. 2. Spring foundresses achieve a large direct fitness by having helpers. 3. These fitness benefits are attributed to markedly higher larval survival rates in multiple-female nests. 4. Intruding into an unrelated nest yields a moderate degree of direct fitness, but coexistence with unrelated females also increase overall brood survival. We discuss reasons why various types of cooperation are maintained in L. baleicum with relation to that how a multiple-female nesting improves larval survival.
Type: article (author version)
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 長谷川 英祐

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