Presentation Title

Effect of Breeding Experience on Egg Investment in Zebra Finches

Advisor Information

Rosemary Strasser

Location

Dr. C.C. and Mabel L. Criss Library

Presentation Type

Poster

Start Date

4-3-2016 10:45 AM

End Date

4-3-2016 12:15 PM

Abstract

Female control over egg investment is a well-studied phenomenon in zebra finches (Taeniopygia guttata). Previous research has demonstrated that females are able to alter both egg size and yolk androgen content in response to physical cues from their pair-mates (i.e., mate attractiveness). Prior to this experiment it was unclear how reproductive experience may influence egg investment. In this experiment ten newly formed pairs were allowed to breed two clutches of eggs. Average egg mass and egg volume were calculated for each of the pairs’ two clutches of eggs. A repeated measures ANOVA was used to determine if average egg mass and volume changed between the first clutch (no prior breeding experience) and the second clutch (prior breeding experience). Average egg mass and egg volume were significantly higher for the second clutch compared to the first (mass: F1,9=7.643, p=0.022; volume: F1,9=11.716, p=0.008). Importantly, this demonstrates that female zebra finches are capable of altering investment in response to previous experience in addition to physical cues from their mates.

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Mar 4th, 10:45 AM Mar 4th, 12:15 PM

Effect of Breeding Experience on Egg Investment in Zebra Finches

Dr. C.C. and Mabel L. Criss Library

Female control over egg investment is a well-studied phenomenon in zebra finches (Taeniopygia guttata). Previous research has demonstrated that females are able to alter both egg size and yolk androgen content in response to physical cues from their pair-mates (i.e., mate attractiveness). Prior to this experiment it was unclear how reproductive experience may influence egg investment. In this experiment ten newly formed pairs were allowed to breed two clutches of eggs. Average egg mass and egg volume were calculated for each of the pairs’ two clutches of eggs. A repeated measures ANOVA was used to determine if average egg mass and volume changed between the first clutch (no prior breeding experience) and the second clutch (prior breeding experience). Average egg mass and egg volume were significantly higher for the second clutch compared to the first (mass: F1,9=7.643, p=0.022; volume: F1,9=11.716, p=0.008). Importantly, this demonstrates that female zebra finches are capable of altering investment in response to previous experience in addition to physical cues from their mates.