TY - JOUR
T1 - The disperser dilemma in cooperatively breeding birds
AU - Heifetz, Aviad
N1 - Publisher Copyright: © 2023 The Author. Journal of Evolutionary Biology published by John Wiley & Sons Ltd on behalf of European Society for Evolutionary Biology. © 2023 The Author. Journal of Evolutionary Biology published by John Wiley & Sons Ltd on behalf of European Society for Evolutionary Biology.
PY - 2023/10
Y1 - 2023/10
N2 - In most cooperatively breeding birds, individuals do not breed with their natal group members. In order to breed, they have either to disperse into another group or wait for an opposite-sex individual to join their group. In most of these species, females disperse more than males. We develop a dynamic game-theoretic model to account for this asymmetry. When males are physically larger/heavier than females, this allows them to effectively welcome female immigrants into their natal group and overcome the local females' opposition more than vice versa. The model further assumes that the dispersal decision is not confined to a restricted time window, but is rather based on acquired information and responsive to opportunities. The model predicts that (i) females disperse more than males, and (ii) females are willing to tolerate more risks in dispersal than do males. The latter prediction is supported inter alia by the fact that in many cooperatively breeding birds, females disperse at a younger age, and further away from their natal group as compared to dispersing males.
AB - In most cooperatively breeding birds, individuals do not breed with their natal group members. In order to breed, they have either to disperse into another group or wait for an opposite-sex individual to join their group. In most of these species, females disperse more than males. We develop a dynamic game-theoretic model to account for this asymmetry. When males are physically larger/heavier than females, this allows them to effectively welcome female immigrants into their natal group and overcome the local females' opposition more than vice versa. The model further assumes that the dispersal decision is not confined to a restricted time window, but is rather based on acquired information and responsive to opportunities. The model predicts that (i) females disperse more than males, and (ii) females are willing to tolerate more risks in dispersal than do males. The latter prediction is supported inter alia by the fact that in many cooperatively breeding birds, females disperse at a younger age, and further away from their natal group as compared to dispersing males.
KW - continuously stable strategy
KW - cooperatively breeding birds
KW - sex-biased dispersal
UR - http://www.scopus.com/inward/record.url?scp=85170695632&partnerID=8YFLogxK
U2 - https://doi.org/10.1111/jeb.14211
DO - https://doi.org/10.1111/jeb.14211
M3 - مقالة
C2 - 37702035
SN - 1010-061X
VL - 36
SP - 1539
EP - 1546
JO - Journal of Evolutionary Biology
JF - Journal of Evolutionary Biology
IS - 10
ER -