Offspring size-number strategies:: experimental manipulation of offspring size in a viviparous lizard (Lacerta vivipara)
Offspring size-number strategies:: experimental manipulation of offspring size in a viviparous lizard (Lacerta vivipara)
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DOI：
10.1046/j.0269-8463.2001.00600.x
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发表时间：
2002-02-01
影响因子：
5.2
通讯作者：
Olofsson, C
中科院分区：
文献类型：
--
作者：
Olsson, M;Wapstra, E;Olofsson, C
1.通过手术从卵泡和输卵管内的排卵中提取卵黄，研究了胎生普通蜥蜴(Lacerta Vivipara Jacquin)雌性后代大小和数量的策略(异速生长工程)。这种方法以前只适用于卵生蜥蜴，但现在它适用于胎生分类群。去卵黄量与子代出生时的大小呈显著负相关，去卵黄组仔猪出生时比同窝对照仔猪体型较小，状况较差。去卵黄仔猪的生理表现与体质量呈正相关。母体资源的供应因此影响后代的生理表现，这表明雌性动物正在进行选择，以优化后代的大小和数量之间的权衡。
1. Aspects of female 'offspring size vs number' strategies were studied in the viviparous Common Lizard, Lacerta vivipara 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 body mass.5. Maternal resource provisioning thus influences offspring physiological performance, which suggests ongoing selection on female optimization of the offspring size-number trade-off.