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母体状况会影响对后代的表型选择。

Maternal condition influences phenotypic selection on offspring.

作者信息

Gagliano Monica, McCormick Mark I

机构信息

Australian Research Council Centre of Excellence for Coral Reef Studies, School of Marine Biology, James Cook University, Townsville, Queensland 4811, Australia.

出版信息

J Anim Ecol. 2007 Jan;76(1):174-82. doi: 10.1111/j.1365-2656.2006.01187.x.

Abstract
  1. Environmentally induced maternal effects are known to affect offspring phenotype, and as a result, the dynamics and evolution of populations across a wide range of taxa. 2. In a field experiment, we manipulated maternal condition by altering food availability, a key factor influencing maternal energy allocation to offspring. We then examined how maternal condition at the time of gametogenesis affects the relationships among early life-history traits and survivorship during early development of the coral reef fish Pomacentrus amboinensis. 3. Maternal condition did not affect the number of embryos that hatched or the number of hatchlings surviving to a set time. 4. We found no significant difference in egg size in relation to the maternal physiological state. However, eggs spawned by supplemented mothers were provisioned with greater energy reserves (yolk-sac and oil globule size) than nonsupplemented counterparts, suggesting that provision of energy reserves rather than egg size more closely reflected the maternal environment. 5. Among offspring originating from supplemented mothers, those with larger yolk-sacs were more likely to successfully hatch and survive for longer periods after hatching. However, among offspring from nonsupplemented mothers, yolk-sac size was either inconsequential to survival or offspring with smaller yolk-sac sizes were favoured. Mothers appear to influence the physiological capacity of their progeny and in turn the efficiency of individual offspring to utilize endogenous reserves. 6. In summary, our results show that the maternal environment influences the relationship between offspring characteristics and survival and suggest that energy-driven selective mechanisms may operate to determine progeny viability.
摘要
  1. 已知环境诱导的母体效应会影响后代的表型,进而影响广泛分类群中种群的动态和进化。2. 在一项田间实验中,我们通过改变食物供应来操纵母体状况,食物供应是影响母体向后代能量分配的关键因素。然后,我们研究了配子发生时的母体状况如何影响珊瑚礁鱼类安汶雀鲷早期发育过程中早期生活史特征与存活率之间的关系。3. 母体状况并未影响孵化的胚胎数量或存活到设定时间的幼体数量。4. 我们发现卵的大小与母体生理状态无关。然而,补充食物的母体所产的卵比未补充食物的母体所产的卵具有更多的能量储备(卵黄囊和油球大小),这表明能量储备而非卵的大小更能反映母体环境。5. 在来自补充食物的母体的后代中,卵黄囊较大的个体更有可能成功孵化并在孵化后存活更长时间。然而,在未补充食物的母体的后代中,卵黄囊大小对存活无关紧要,或者卵黄囊较小的后代更具优势。母体似乎会影响其后代的生理能力,进而影响单个后代利用内源性储备的效率。6. 总之,我们的结果表明母体环境会影响后代特征与生存之间的关系,并表明能量驱动的选择机制可能在决定后代活力方面发挥作用。

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