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Related Experiment Video

Updated: Jul 11, 2026

Microscopy of Fission Yeast Sexual Lifecycle

Microscopy of Fission Yeast Sexual Lifecycle

Published on: March 9, 2016

Monogamy on the fast track.

Elizabeth Adkins-Regan¹, Michelle Tomaszycki

¹Department of Psychology, 218 Uris Hall, Cornell University, Ithaca, NY 14853, USA. er12@cornell.edu

Biology Letters

|September 13, 2007

Summary

Socially monogamous birds may stay paired for life to reproduce faster. Experiments show zebra finches (Taeniopygia guttata) breeding with existing partners initiate clutches quicker than those that must re-pair.

Area of Science:

Behavioral Ecology
Evolutionary Biology
Ornithology

Background:

Social monogamy is common in birds, but reasons for permanent pairing versus partner switching are unclear.
Estrildid finches are hypothesized to maintain pair bonds due to their short lifespans and opportunistic breeding strategies.
Experimental evidence testing hypotheses for long-term pair bonding is scarce.

Purpose of the Study:

To experimentally test the hypothesis that continuous pairing accelerates reproduction in short-lived, gregarious bird species.
To investigate the reproductive benefits of maintaining pair bonds in zebra finches (Taeniopygia guttata).

Main Methods:

Controlled experimental manipulation of pair relationships in zebra finches.
Comparison of clutch initiation times between continuously paired birds and those that experienced partner separation and re-pairing.

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Main Results:

Zebra finches allowed to remain with their partners initiated their next clutch approximately 3 days faster than birds that had to re-pair.
This finding supports the hypothesis that continuous pairing provides a reproductive advantage.

Conclusions:

Maintaining long-term monogamous pair bonds can significantly speed up the initiation of reproduction in species like the zebra finch.
This accelerated reproduction is a key benefit of long-term monogamy for small, short-lived, gregarious species.