Ovulation order mediates a trade-off between pre-hatching and post-hatching viability in an altricial bird.

Simultaneously dependent siblings often compete for parentally provided resources. This competition may lead to mortality, the probability of which may be a function, in part, of the individual offspring's production order. In birds, serial ovulation followed by hatching asynchrony of simultane...

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Autor principal:	Keith W Sockman
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2008
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/5cddbf1c9cd44251a95683df685ec17d
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spelling	oai:doaj.org-article:5cddbf1c9cd44251a95683df685ec17d2021-11-25T06:13:06ZOvulation order mediates a trade-off between pre-hatching and post-hatching viability in an altricial bird.1932-620310.1371/journal.pone.0001785https://doaj.org/article/5cddbf1c9cd44251a95683df685ec17d2008-03-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/18335056/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Simultaneously dependent siblings often compete for parentally provided resources. This competition may lead to mortality, the probability of which may be a function, in part, of the individual offspring's production order. In birds, serial ovulation followed by hatching asynchrony of simultaneous dependents leads to differences in post-hatching survival that largely depend on ovulation (laying) order. This has led to the widespread assumption that early-laid eggs are of greater value and therefore should possess different maternally manipulated characteristics than later-laid eggs. However, this perspective ignores the potential effect of laying order on pre-hatching viability, an effect which some studies suggest should offset the effect of laying order on post-hatching viability. I examined the relationship between laying order and hatching and fledging probability in wild, free-living Lincoln's sparrows (Melospiza lincolnii). In broods with complete hatching success, first-laid and therefore first-hatched offspring had the highest probability of fledging, and fledging probability declined with increasing laying order. However, first-laid eggs were less likely than later-laid eggs to hatch. This effect of laying order on pre-hatching viability seemed to offset that on post-hatching viability, and, consistently, maternal investment in egg size varied little if at all with respect to laying order. These results suggest that ovulation order mediates a trade-off between pre-hatching and post-hatching viability and should encourage a re-evaluation of the solitary role post-embryonic survival often plays when researchers make assumptions about the value of propagules based on the order in which they are produced.Keith W SockmanPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 3, Iss 3, p e1785 (2008)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Keith W Sockman Ovulation order mediates a trade-off between pre-hatching and post-hatching viability in an altricial bird.
description	Simultaneously dependent siblings often compete for parentally provided resources. This competition may lead to mortality, the probability of which may be a function, in part, of the individual offspring's production order. In birds, serial ovulation followed by hatching asynchrony of simultaneous dependents leads to differences in post-hatching survival that largely depend on ovulation (laying) order. This has led to the widespread assumption that early-laid eggs are of greater value and therefore should possess different maternally manipulated characteristics than later-laid eggs. However, this perspective ignores the potential effect of laying order on pre-hatching viability, an effect which some studies suggest should offset the effect of laying order on post-hatching viability. I examined the relationship between laying order and hatching and fledging probability in wild, free-living Lincoln's sparrows (Melospiza lincolnii). In broods with complete hatching success, first-laid and therefore first-hatched offspring had the highest probability of fledging, and fledging probability declined with increasing laying order. However, first-laid eggs were less likely than later-laid eggs to hatch. This effect of laying order on pre-hatching viability seemed to offset that on post-hatching viability, and, consistently, maternal investment in egg size varied little if at all with respect to laying order. These results suggest that ovulation order mediates a trade-off between pre-hatching and post-hatching viability and should encourage a re-evaluation of the solitary role post-embryonic survival often plays when researchers make assumptions about the value of propagules based on the order in which they are produced.
format	article
author	Keith W Sockman
author_facet	Keith W Sockman
author_sort	Keith W Sockman
title	Ovulation order mediates a trade-off between pre-hatching and post-hatching viability in an altricial bird.
title_short	Ovulation order mediates a trade-off between pre-hatching and post-hatching viability in an altricial bird.
title_full	Ovulation order mediates a trade-off between pre-hatching and post-hatching viability in an altricial bird.
title_fullStr	Ovulation order mediates a trade-off between pre-hatching and post-hatching viability in an altricial bird.
title_full_unstemmed	Ovulation order mediates a trade-off between pre-hatching and post-hatching viability in an altricial bird.
title_sort	ovulation order mediates a trade-off between pre-hatching and post-hatching viability in an altricial bird.
publisher	Public Library of Science (PLoS)
publishDate	2008
url	https://doaj.org/article/5cddbf1c9cd44251a95683df685ec17d
work_keys_str_mv	AT keithwsockman ovulationordermediatesatradeoffbetweenprehatchingandposthatchingviabilityinanaltricialbird
_version_	1718414043065090048

Ovulation order mediates a trade-off between pre-hatching and post-hatching viability in an altricial bird.

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