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Birds: Divorce and breeding dispersal may support the better option hypothesis

Date:
April 11, 2012
Source:
Brill
Summary:
Divorce and breeding dispersal in the dunlin Calidris alpina bird may provide support for the better option hypothesis.
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Divorce and breeding dispersal in the dunlin Calidris alpina may provide support for the better option hypothesis.

Dunlins are long-lived shorebirds that often mate with the same partner over several seasons. In 126 recorded breeding attempts by dunlins, biologists Lars-Åke Flodin and Donald Blomqvist found that 23% of the pairs divorced.

They compared the breeding success of males and females before and after divorce to explore some causes and consequences of divorce.

Divorcing couples did not differ from non-divorcing couples in nest success in the season preceding divorce, both in terms of total nest failure or the number of eggs in the nest.

Non-divorcing pairs and male divorcees that paired with new partners had similar nest success in consecutive years.

However, female divorcees that found new partners doubled their nest success.

The authors concluded that female dunlins divorce to upgrade to a better mate or territory.


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The above post is reprinted from materials provided by Brill. Note: Materials may be edited for content and length.


Journal Reference:

  1. Lars-Åke Flodin, Donald Blomqvist. Divorce and breeding dispersal in the dunlin Calidris alpina: support for the better option hypothesis? Behaviour, 2012; 149 (1): 67 DOI: 10.1163/156853912X626295

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Brill. "Birds: Divorce and breeding dispersal may support the better option hypothesis." ScienceDaily. ScienceDaily, 11 April 2012. <www.sciencedaily.com/releases/2012/04/120411084036.htm>.
Brill. (2012, April 11). Birds: Divorce and breeding dispersal may support the better option hypothesis. ScienceDaily. Retrieved July 4, 2015 from www.sciencedaily.com/releases/2012/04/120411084036.htm
Brill. "Birds: Divorce and breeding dispersal may support the better option hypothesis." ScienceDaily. www.sciencedaily.com/releases/2012/04/120411084036.htm (accessed July 4, 2015).

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