Condition and reproductive investment in the western mosquitofish (Gambusia affinis): little evidence for condition-dependent sex-biased investment

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

In sexually reproducing species, resources may theoretically be distributed with bias to the production of male or female offspring in response to the condition of the mother, commonly recognized as sex allocation. Using a recently characterized sex-specific molecular marker, we tested for maternal sex allocation (i.e. maternal primary sex ratio bias and sex-specific offspring investment) in captive laboratory-bred western mosquitofish (Gambusia affinis) at early stages of offspring development. We found no statistical evidence to support sex allocation in G. affinis, based on maternal condition. In addition, we found little evidence for correlations between maternal condition and investment in the condition (mass) of individual offspring (of one sex or the other), although we did find that larger mothers tended to have higher fecundity.

Detaljer

Författare
  • Alistair M. Senior
  • Jiahui N. Lim
  • Sofia Adolfsson
  • Dunja K. Lamatsch
  • Shinichi Nakagawa
Enheter & grupper
Externa organisationer
  • University of Otago
  • University of New South Wales
  • University of Sydney
  • University of Innsbruck
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Zoologi

Nyckelord

Originalspråkengelska
Sidor (från-till)430-435
Antal sidor6
TidskriftBiological Journal of the Linnean Society
Volym119
Utgivningsnummer2
StatusPublished - 2016 okt 1
PublikationskategoriForskning
Peer review utfördJa