Research Article

Ovulation Order Mediates a Trade-Off between Pre-Hatching and Post-Hatching Viability in an Altricial Bird

  • Keith W. Sockman mail

    To whom correspondence should be addressed. E-mail:

    Affiliation: Department of Biology, University of North Carolina, Chapel Hill, North Carolina, United States of America

  • Published: March 12, 2008
  • DOI: 10.1371/journal.pone.0001785

Reader Comments (6)

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Probabilities of hatching and survival

Posted by zebra77 on 23 Jun 2008 at 14:44 GMT

Given relatively high hatching (average ca. 0.8, Fig 3) and fledging probabilities (average ca. 0.8 – reported for completely hatched broods, Fig 1) it is puzzling why combined survival is as low as 0.4 (Fig 4). Is it caused by lower post-hatching survival in incompletely hatched broods?

RE: Probabilities of hatching and survival

kwsockman replied to zebra77 on 04 Jul 2008 at 22:06 GMT

I think the apparent discrepancy between the probabilities of hatching in all broods, fledging in broods with 100% hatching success, and fledging in all broods is probably due to low hatching survival in incompletely hatched broods, as you indicate.