Yolk removal generates hatching asynchrony in snake eggs

Abstract Hatching synchrony is wide-spread amongst egg-laying species and is thought to enhance offspring survival, notably by diluting predation risks. Turtle and snake eggs were shown to achieve synchronous hatching by altering development rates (where less advanced eggs may accelerate development...

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Autores principales:	Fabien Aubret, Florent Bignon, Alix Bouffet-Halle, Gaëlle Blanvillain, Philippe J. R. Kok, Jérémie Souchet
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/51745166306f47aea5c1340b64e9f878
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spelling	oai:doaj.org-article:51745166306f47aea5c1340b64e9f8782021-12-02T15:04:54ZYolk removal generates hatching asynchrony in snake eggs10.1038/s41598-017-03355-y2045-2322https://doaj.org/article/51745166306f47aea5c1340b64e9f8782017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03355-yhttps://doaj.org/toc/2045-2322Abstract Hatching synchrony is wide-spread amongst egg-laying species and is thought to enhance offspring survival, notably by diluting predation risks. Turtle and snake eggs were shown to achieve synchronous hatching by altering development rates (where less advanced eggs may accelerate development) or by hatching prematurely (where underdeveloped embryos hatch concurrently with full-term embryos). In Natricine snakes, smaller eggs tend to slow down metabolism throughout incubation in order to hatch synchronously with larger eggs. To explore the underlying mechanism of this phenomenon we experimentally manipulated six clutches, where half of the eggs were reduced in mass by removing 7.2% of yolk, and half were used as the control. The former experienced higher heart rates throughout the incubation period, hatched earlier and produced smaller hatchlings than the latter. This study supports the idea that developmental rates are related to egg mass in snake eggs and demonstrates that the relationship can be influenced by removing yolk after egg-laying. The shift in heart rates however occurred in the opposite direction to expected, with higher heart rates in yolk-removed eggs resulting in earlier hatching rather than lower heart rates resulting in synchronous hatching, warranting further research on the topic.Fabien AubretFlorent BignonAlix Bouffet-HalleGaëlle BlanvillainPhilippe J. R. KokJérémie SouchetNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Fabien Aubret Florent Bignon Alix Bouffet-Halle Gaëlle Blanvillain Philippe J. R. Kok Jérémie Souchet Yolk removal generates hatching asynchrony in snake eggs
description	Abstract Hatching synchrony is wide-spread amongst egg-laying species and is thought to enhance offspring survival, notably by diluting predation risks. Turtle and snake eggs were shown to achieve synchronous hatching by altering development rates (where less advanced eggs may accelerate development) or by hatching prematurely (where underdeveloped embryos hatch concurrently with full-term embryos). In Natricine snakes, smaller eggs tend to slow down metabolism throughout incubation in order to hatch synchronously with larger eggs. To explore the underlying mechanism of this phenomenon we experimentally manipulated six clutches, where half of the eggs were reduced in mass by removing 7.2% of yolk, and half were used as the control. The former experienced higher heart rates throughout the incubation period, hatched earlier and produced smaller hatchlings than the latter. This study supports the idea that developmental rates are related to egg mass in snake eggs and demonstrates that the relationship can be influenced by removing yolk after egg-laying. The shift in heart rates however occurred in the opposite direction to expected, with higher heart rates in yolk-removed eggs resulting in earlier hatching rather than lower heart rates resulting in synchronous hatching, warranting further research on the topic.
format	article
author	Fabien Aubret Florent Bignon Alix Bouffet-Halle Gaëlle Blanvillain Philippe J. R. Kok Jérémie Souchet
author_facet	Fabien Aubret Florent Bignon Alix Bouffet-Halle Gaëlle Blanvillain Philippe J. R. Kok Jérémie Souchet
author_sort	Fabien Aubret
title	Yolk removal generates hatching asynchrony in snake eggs
title_short	Yolk removal generates hatching asynchrony in snake eggs
title_full	Yolk removal generates hatching asynchrony in snake eggs
title_fullStr	Yolk removal generates hatching asynchrony in snake eggs
title_full_unstemmed	Yolk removal generates hatching asynchrony in snake eggs
title_sort	yolk removal generates hatching asynchrony in snake eggs
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/51745166306f47aea5c1340b64e9f878
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_version_	1718389015322820608

Yolk removal generates hatching asynchrony in snake eggs

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