Senescence of Maternal Effects: Aging Influences Egg Quality and Rearing Capacities of a Long-Lived Bird
Senescence of Maternal Effects: Aging Influences Egg Quality and Rearing Capacities of a Long-Lived Bird
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DOI：
10.1086/650726
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发表时间：
2010-04-01
影响因子：
2.9
通讯作者：
Torres, Roxana
中科院分区：
文献类型：
--
作者：
Beamonte-Barrientos, Rene;Velando, Alberto;Torres, Roxana
衰老可能会降低母亲在产前和产后对后代投资的能力。对蓝脚鲣鸟（苏拉nebouxii）的纵向观察显示，雌性年龄对雏鸟产量和生殖下降率的队列差异有二次效应。通过在不同年龄的雌性之间交换离合器，我们测试了生殖衰老是否是由于卵子质量下降或照顾能力下降。随着产蛋母亲年龄的增长，鸡蛋的大小，尺骨长度的5日龄雏鸡，尺骨生长的第二个小鸡到30天的年龄下降，并作为饲养母亲的年龄，尺骨生长和细胞介导的免疫反应的第二个小鸡减少。奇怪的是，衰老的雌性（>11岁）在养育中年雌性（8-11岁）的后代时比养育衰老或年轻雌性的后代时产生更多的雏鸟。因此，衰老降低了卵子质量和饲养能力，衰老母亲的生殖成功取决于与产蛋母亲年龄相关的产前影响。鲣鸟的生殖衰老可能涉及资源分配的限制，以及根据后代的价值提供和照顾的适应性调整，这意味着衰老对后代生存的负面影响可以改善可塑性在产后或产后护理。
Senescence could depress prenatal and postnatal capacities of mothers to invest in offspring. Longitudinal observations on the blue-footed booby (Sula nebouxii) revealed a quadratic effect of female age on fledgling production and cohort differences in rate of reproductive decline. By swapping clutches between females of different ages, we tested whether reproductive senescence is due to decline in egg quality or capacity to care. As laying mothers aged, egg size, ulna length of 5-day-old chicks, and ulna growth of second chicks up to age 30 days declined, and as rearing mothers aged, ulna growth and cellular mediated immune response of second chicks diminished. Oddly, senescent females (>11 years) produced more fledglings when rearing offspring of middle-aged females (8-11 years) than when rearing offspring of senescent or young females. Thus, senescence reduced egg quality and rearing capacities, and reproductive success of senescent mothers depended on prenatal effects associated with the age of the laying mother. Reproductive senescence of boobies may involve constraints on resources allocated to reproduction as well as adaptive adjustment of provision and care according to offspring value, implying that negative effects of senescence on offspring survival can be ameliorated by plasticity in postlaying or postnatal care.