Summary
A breeding experiment was performed to examine the hypothesis that zebra finches (Taeniopygia guttata) preferentially mate with full sibs. Each bird had the opportunity to mate with one of 2 sibs or 28 nonsibs. Preferential mating between relatives did not occur. Offspring of sib pairs developed more slowly and sib pairs experienced more reproductive loss through death of offspring.
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Fetherston, I.A., Burley, N.T. Do zebra finches prefer to mate with close relatives?. Behav Ecol Sociobiol 27, 411–414 (1990). https://doi.org/10.1007/BF00164067
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DOI: https://doi.org/10.1007/BF00164067