Fitness consequences of peak reproductive effort in a resource pulse system.
Sci Rep
; 7(1): 9335, 2017 08 24.
Article
in En
| MEDLINE
| ID: mdl-28839275
ABSTRACT
The age trajectory of reproductive performance of many iteroparous species features an early - life increase in performance followed by a late - life senescent decline. The largest contribution of lifetime reproductive success is therefore gained at the age at which reproductive performance peaks. Using long term data on North American red squirrels we show that the environmental conditions individuals encountered could cause variation among individuals in the "height" and timing of this peak, contributing to life history variation and fitness in this population that experiences irregular resource pulses. As expected, high peak effort was positively associated with lifetime reproductive output up to a high level of annual effort. Furthermore, individuals that matched their peak reproductive effort to an anticipated resource pulse gained substantial fitness benefits through recruiting more offspring over their lifetime. Individual variation in peak reproductive effort thus has strong potential to shape life history evolution by facilitating adaptation to fluctuating environments.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Sciuridae
/
Sexual Behavior, Animal
/
Environmental Exposure
Limits:
Animals
Country/Region as subject:
America do norte
Language:
En
Journal:
Sci Rep
Year:
2017
Document type:
Article
Publication country:
ENGLAND
/
ESCOCIA
/
GB
/
GREAT BRITAIN
/
INGLATERRA
/
REINO UNIDO
/
SCOTLAND
/
UK
/
UNITED KINGDOM