Data from: Hatching asynchrony aggravates inbreeding depression in a songbird (Serinus canaria): an inbreeding-environment interaction
de Boer, Raïssa Anna, University of Antwerp
Eens, Marcel, University of Antwerp
Fransen, Erik, University of Antwerp
Müller, Wendt, University of Antwerp
Published Feb 10, 2015 on Dryad.
Cite this dataset
de Boer, Raïssa Anna; Eens, Marcel; Fransen, Erik; Müller, Wendt (2015). Data from: Hatching asynchrony aggravates inbreeding depression in a songbird (Serinus canaria): an inbreeding-environment interaction [Dataset]. Dryad. https://doi.org/10.5061/dryad.tj3pd
Understanding how the intensity of inbreeding depression is influenced by stressful environmental conditions is an important area of enquiry in various fields of biology. In birds, environmental stress during early development is often related to hatching asynchrony; differences in age, and thus size, impose a gradient in conditions ranging from benign (first hatched chick) to harsh (last hatched chick). Here, we compared the effect of hatching order on growth rate in inbred (parents are full siblings) and outbred (parents are unrelated) canary chicks (Serinus canaria). We found that inbreeding depression was more severe under more stressful conditions, being most evident in later hatched chicks. Thus, consideration of inbreeding-environment interactions is of vital importance for our understanding of the biological significance of inbreeding depression and hatching asynchrony. The latter is particularly relevant given that hatching asynchrony is a widespread phenomenon, occurring in many bird species. The exact causes of the observed inbreeding-environment interaction are as yet unknown, but may be related to a decrease in maternal investment in egg contents with laying position (i.e. pre-hatching environment), or to performance of the chicks during sibling competition and/or their resilience to food shortage (i.e. post-hatching environment).
Growth data of inbred and outbred canary nestlings
Data was collected on a captive group of canaries. The dataset contains weights of inbred (=parents are full sibling), and outbred (=parents are unrelated) canary chicks until 15 days after hatching. Hatching position, hatch date, nest identity, breeding cluster, survival until day 15, and sexe was additionally noted for each chick.