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Sex‐specific associative learning cues and inclusive fitness benefits in the Seychelles warbler
Author(s) -
Richardson D. S.,
Burke T.,
Komdeur J.
Publication year - 2003
Publication title -
journal of evolutionary biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.289
H-Index - 128
eISSN - 1420-9101
pISSN - 1010-061X
DOI - 10.1046/j.1420-9101.2003.00592.x
Subject(s) - biology , warbler , evolutionary biology , associative learning , inclusive fitness , associative property , mimicry , ecology , zoology , neuroscience , habitat , mathematics , pure mathematics
In cooperative breeding vertebrates, indirect fitness benefits would be maximized by subordinates that accurately assess their relatedness to group offspring and preferentially help more closely related kin. In the Seychelles warbler ( Acrocephalus sechellensis ), we found a positive relationship between subordinate‐nestling kinship (determined using microsatellite marker genotypes) and provisioning rates, but only for female subordinates. Female subordinates that helped were significantly more related to the nestlings than were nonhelpers, and the decision to help appears to be based on associative learning cues. High levels of female infidelity means that subordinates cannot trust their legitimacy through the male line, consequently they appear to use the continued presence of the primary female, but not the primary male, as a reliable cue to determine when to feed nestlings. By using effective discrimination, female subordinates are able to maximize the indirect benefits gained within a cooperative breeding system otherwise driven primarily by direct breeding benefits.