What is the meta-analytic evidence for life-history trade-offs at the genetic level?
Ecol Lett
; 27(1): e14354, 2024 Jan.
Article
em En
| MEDLINE
| ID: mdl-38115163
ABSTRACT
Understanding the evolutionary mechanisms underlying the maintenance of individual differences in behavior and physiology is a fundamental goal in ecology and evolution. The pace-of-life syndrome hypothesis is often invoked to explain the maintenance of such within-population variation. This hypothesis predicts that behavioral traits are part of a suite of correlated traits that collectively determine an individual's propensity to prioritize reproduction or survival. A key assumption of this hypothesis is that these traits are underpinned by genetic trade-offs among life-history traits genetic variants that increase fertility, reproduction and growth might also reduce lifespan. We performed a systematic literature review and meta-analysis to summarize the evidence for the existence of genetic trade-offs between five key life-history traits survival, growth rate, body size, maturation rate, and fertility. Counter to our predictions, we found an overall positive genetic correlation between survival and other life-history traits and no evidence for any genetic correlations between the non-survival life-history traits. This finding was generally consistent across pairs of life-history traits, sexes, life stages, lab vs. field studies, and narrow- vs. broad-sense correlation estimates. Our study highlights that genetic trade-offs may not be as common, or at least not as easily quantifiable, in animals as often assumed.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Evolução Biológica
/
Características de História de Vida
Tipo de estudo:
Systematic_reviews
Limite:
Animals
Idioma:
En
Revista:
Ecol Lett
/
Ecol. lett
/
Ecology letters
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Estados Unidos