Influence of mate preference and laying order on maternal allocation in a monogamous parrot species with extreme hatching asynchrony

Stefanie E. P. Lahaye*, Marcel Eens, Arne Iserbyt, Ton G. G. Groothuis, Bonnie de Vries, Wendt Muller, Rianne Pinxten

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

4 Citations (Scopus)

Abstract

It is well established that in many avian species, prenatal maternal resource allocation varies both between and within clutches and may affect offspring fitness. Differential allocation of maternal resources, in terms of egg weight and yolk composition, may therefore allow the female to adjust brood reduction and to fine-tune reproductive investment in accordance with the expected fitness returns. The adaptive value of such maternal resource allocation is thought to be context-dependent as well as species-specific. We investigated the effects of female preference for her mate on the allocation of prenatal maternal resources in the budgerigar, Melopsittacus undulatus, a monogamous species of parrot that shows an extreme hatching asynchrony. We assessed mate preferences in a two-way preference test and allowed females two breeding rounds: one with the preferred and one with the non-preferred partner. We found no effect of preference on either latency to lay or clutch size, but females mated with the preferred partner laid eggs that contained significantly more yolk. Their eggs also contained significantly more androstenedione but not testosterone. Our results suggest that in this species, female preference may influence maternal resource allocation, and that the functional roles of each androgen in the yolk should be considered separately. In addition, we found a significant effect of laying order on egg and yolk weight as well as on yolk testosterone and androstenedione levels. These measures, however, did not change linearly with the laying order and render it unlikely that female budgerigars compensate for the extreme hatching asynchrony by adjusting within-clutch allocation of prenatal maternal resources. (C) 2015 Elsevier Inc. All rights reserved.

Original languageEnglish
Pages (from-to)49-59
Number of pages11
JournalHormones and Behavior
Volume71
DOIs
Publication statusPublished - May-2015

Keywords

  • Maternal effects
  • Differential allocation
  • Male attractiveness
  • Yolk hormones
  • Hatching asynchrony
  • Androstenedione
  • Testosterone
  • Reproductive investment
  • Melopsittacus undulatus
  • YOLK TESTOSTERONE LEVELS
  • JACKDAWS CORVUS-MONEDULA
  • GULL LARUS-RIDIBUNDUS
  • EGG-SIZE VARIATION
  • MALE ATTRACTIVENESS
  • MELOPSITTACUS-UNDULATUS
  • REPRODUCTIVE SUCCESS
  • ZEBRA FINCH
  • DIFFERENTIAL-ALLOCATION
  • ANDROGEN DEPOSITION

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