Presentation Title

Egg Investment Strategy is Impacted by Paternal Care in Zebra Finches

Advisor Information

Rosemary Strasser

Location

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

Presentation Type

Poster

Start Date

2-3-2018 9:00 AM

End Date

2-3-2018 10:15 AM

Abstract

Previous work with zebra finches (Taeniopygia guttat) has demonstrated that females alter egg investment based on the physical attractiveness of their mate. However, it remains unclear if females alter reproductive investment in response to variation in paternal care. Newly formed pairs of zebra finches were assigned to either a biparental rearing condition (the pair raised four chicks) or a uniparental condition where the female raised two chicks without the help of her mate. Egg weight was recorded for a pairs first clutch (laid prior to rearing any chicks) and second clutch (laid after parenting in either the uniparental or biparental condition). Egg size asymmetry was altered after parenting in the uniparental condition, such that the first egg of a clutch was larger than the last egg. This represents a reversal from the typical investment pattern where egg size increases within a clutch.

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Mar 2nd, 9:00 AM Mar 2nd, 10:15 AM

Egg Investment Strategy is Impacted by Paternal Care in Zebra Finches

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

Previous work with zebra finches (Taeniopygia guttat) has demonstrated that females alter egg investment based on the physical attractiveness of their mate. However, it remains unclear if females alter reproductive investment in response to variation in paternal care. Newly formed pairs of zebra finches were assigned to either a biparental rearing condition (the pair raised four chicks) or a uniparental condition where the female raised two chicks without the help of her mate. Egg weight was recorded for a pairs first clutch (laid prior to rearing any chicks) and second clutch (laid after parenting in either the uniparental or biparental condition). Egg size asymmetry was altered after parenting in the uniparental condition, such that the first egg of a clutch was larger than the last egg. This represents a reversal from the typical investment pattern where egg size increases within a clutch.