Offspring size–number strategies: experimental manipulation of offspring size in a viviparous lizard (Lacerta vivipara)
Olsson, M and Wapstra, E and Olofsson, C (2002) Offspring size–number strategies: experimental manipulation of offspring size in a viviparous lizard (Lacerta vivipara). Functional Ecology, 16 (1). pp. 135-140. ISSN 0269-8463
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Official URL: http://dx.doi.org/10.1046/j.0269-8463.2001.00600.x
1. Aspects of female ‘offspring size vs
number’ strategies were studied in the viviparous
Jacquin, by surgical yolk extraction from ovarian
follicles and ovulated eggs in the oviduct (‘allometric engineering’).
2. This method has previously been applied exclusively to oviparous lizards but here
it is applied to a viviparous taxon.
3. There was a strong negative relationship between the amount of yolk removed and
the size of offspring at birth, and yolk-removed young were smaller and in poorer
condition at birth than their control counterparts from within the same litters.
4. In yolk-removed young physiological performance was positively correlated with
5. Maternal resource provisioning thus influences offspring physiological performance,
which suggests ongoing selection on female optimization of the offspring size–number
|Additional Information:||The definitive version is available at www.blackwell-synergy.com|
|Keywords:||Allometric engineering, life history, maternal investment|
|Deposited By:||Dr Erik Wapstra|
|Deposited On:||30 Oct 2007 16:14|
|Last Modified:||01 Oct 2008 07:56|
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