RT Journal Article
T1 Positive Correlation between Helpers at Nest and Nestling Immune Response in a Cooperative Breeding Bird.
A1 Valencia-Ruíz, Juliána
A1 Solís, Elena
A1 Sorci, Gabriele
A1 de la Cruz, Carlos
K1 Aves - Crías
AB In cooperatively breeding species, helpers may contribute to the success of the brood by increasing the number of independent offspring, but also, they may affect offspring condition and, hence, their survival and recruitment into the breeding population. This second type of benefits is rarely included in theoretical models or assessed in field studies. Immune response is a good proxy of individual quality and fitness, and there is good evidence that the performance of the immune system of chicks during the nestling phase is related to their chances of survival and future reproduction. However, no study has so far explored whether helpers at the nest might contribute to enhance immune functioning of nestlings in species with a cooperative breeding system. Here we investigate this issue in the azure-winged magpie (Cyanopica cyanus) and found for the first time a positive correlation between the number of helpers at nest and the cell-mediated immune response of nestlings. This effect was not explained by a general improvement of body condition of chicks because it was independent of individual variation in body mass or tarsus length. Our results suggest that helping can have subtle effects on the quality of offspring that may influence their survival and future reproduction.
PB Springer Nature
YR 2006
FD 2006
LK https://hdl.handle.net/10630/33525
UL https://hdl.handle.net/10630/33525
LA eng
NO Valencia, J., Solís, E., Sorci, G., & de la Cruz, C. (2006). Positive Correlation between Helpers at Nest and Nestling Immune Response in a Cooperative Breeding Bird. Behavioral Ecology and Sociobiology, 60(3), 399–404.
NO https://v2.sherpa.ac.uk/id/publication/7864
NO Financial support was from Junta de Extremadura, Project 2PR02A080. Research of J.V. was supported by a postdoctoral grant by Ministerio de Educación y Ciencia of Spain, and that of E.S. by a postgraduated research grant from Junta de Extremadura.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026