Young-boy networks without kin clusters in a lek-mating manakin |
| |
Authors: | David B McDonald |
| |
Institution: | (1) Department of Zoology and Physiology, University of Wyoming, 1000 E University Ave, Dept 3166, Laramie, WY 82071, USA |
| |
Abstract: | I use 10 years of data from a long-term study of lek-mating long-tailed manakins to relate the social network among males
to their spatial and genetic structure. Previously, I showed that the network connectivity of young males predicts their future
success. Here, I ask whether kinship might shape the organization of this “young-boy network”. Not surprisingly, males that
were more socially distant (linked by longer network paths) were affiliated with perch zones (lek arenas) that were further
apart. Relatedness (r) among males within the network decreased as social distance increased, as might be expected under kin selection. Nevertheless,
any role for indirect inclusive fitness benefits is refuted by the slightly negative mean relatedness among males at all social
distances within the network (overall mean r = −0.06). That is, relatedness ranged from slightly negative (−0.04) to more negative (−0.2). In contrast, relatedness in
dyads for which at least one of the males was outside the social network (involving at least one blood-sampled male not documented
to have interacted with other banded males) was slightly above the random expectation (mean r = 0.05). The slight variations around r = 0 among males of different categories likely reflect dispersal dynamics, rather than any influence of kinship on social
organization. Relatedness did not covary with the age difference between males. These results, together with previous results
for lack of relatedness between alpha and beta male partners, refute any role for kin selection in the evolution of cooperative
display in this lek-mating system.
This contribution is part of the special issue “Social Networks: new perspectives” (Guest Editors: J. Krause, D. Lusseau,
and R. James). |
| |
Keywords: | Leks Kin selection Social network Relatedness Kinship Cooperation Manakin |
本文献已被 SpringerLink 等数据库收录! |
|