Females increase current reproductive effort when future access to males is uncertain

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Heubel KU, Lindström K, Kokko H
Förläggare: ROYAL SOC
Publiceringsår: 2008
Tidskrift: Biology Letters
Tidskriftsakronym: BIOL LETTERS
Volym: 4
Nummer: 2
Artikelns första sida, sidnummer: 224
Artikelns sista sida, sidnummer: 227
Antal sidor: 4
ISSN: 1744-9561
eISSN: 1744-957X


Abstrakt

Trade-offs between current and future reproduction shape life histories of organisms, e.g. increased mortality selects for earlier reproductive effort, and mate limitation has been shown to shape male life histories. Here, we show that female life histories respond adaptively to mate limitation. Female common gobies (Pomatoschistus microps) respond to a female-biased operational sex ratio by strongly increasing the size of their first clutch. The plastic response is predicted by a model that assumes that females use the current competitive situation to predict future difficulties of securing a mating. Because female clutch size decisions are much more closely linked to population dynamics than male life-history traits, plastic responses to mate-finding limitations may be an underappreciated force in population dynamics.


Nyckelord

clutch size, female-female competition, life history, offspring allocation, operational sex ratio

Senast uppdaterad 2020-22-01 vid 04:15