Publication details.

Paper

Year:2016
Author(s):A. Payo-Payo, M. Genovart, A. Bertolero, R. Pradel, D. Oro
Title:Consecutive cohort effects driven by density-dependence and climate influence early-life survival in a long-lived bird
Journal:PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
ISSN:0962-8452
JCR Impact Factor:4.94
Volume:283
Issue No.:1829
Pages:1-2
D.O.I.:10.1098/rspb.2015.3042
Web:http://rspb.royalsocietypublishing.org/content/283/1829/20153042
Abstract:
Conditions during early life, including maternal cohort effects, can influence
the future fitness of individuals. This may be particularly true for longdistance
migrating birds, because, apart from conditions experienced by
cohorts during rearing, conditions during early life in regions far from breeding
grounds may also influence their population dynamics. Very little is
known about the fitness consequences of those conditions experienced by
juveniles after independence, especially in wild populations and for longlived
birds. We used multi-event capture–recapture–recovery models and a
unique 26-year dataset for the Audouin’s gull (Larus audouinii) to assess for
the first time whether survival was influenced by early conditions, both
during the rearing period (i.e. a maternal cohort effect potentially affected
by density dependence) and the first winter (i.e. a cohort effect driven by climate
when birds disperse to wintering grounds). Our results show that
juvenile survivalwas highly sensitive to early-life conditions and that survival
decreased with stronger density dependence and harsh climate. The two consecutive
cohort effects were of similar magnitude and they may represent a
selection filter. Thus, early-life conditions had a strong impact on survival,
and neglecting this complexity may hinder our understanding on how
populations of long-lived animals fluctuate and respond to perturbations.

Related research groups

  • Ecology and Evolution