Pérez Jonathan H, Ardia Daniel R, Chad Elise K, Clotfelter Ethan D
Department of Biology, Amherst College, Amherst, MA 01002, USA.
Biol Lett. 2008 Oct 23;4(5):468-71. doi: 10.1098/rsbl.2008.0266.
Investment in one life-history stage can have delayed effects on subsequent life-history stages within a single reproductive bout. We experimentally heated tree swallow (Tachycineta bicolor) nests during incubation to test for effects on parental and nestling conditions. Females incubating in heated boxes maintained higher body condition and fed nestlings at higher rates. We cross-fostered nestlings and found that young nestlings (4-7 days old) incubated in heated nests had higher body condition and body mass, regardless of treatment status of their rearing parent. However, older nestlings which were fed by heated females maintained higher condition and body mass regardless of treatment status of their incubating parent. These results indicate that investment in one life-history stage can have multiple pathways of carry-over effects on future life-history stages.
在单一繁殖周期内,对一个生活史阶段的投入可能会对后续生活史阶段产生延迟影响。我们在孵化期对树燕(双色树燕)巢穴进行实验性加热,以测试对亲代和雏鸟状况的影响。在加热箱中孵化的雌性保持了更好的身体状况,并以更高的频率喂养雏鸟。我们对雏鸟进行了交叉寄养,发现无论养育亲鸟的处理状态如何,在加热巢穴中孵化的幼雏(4 - 7天大)身体状况和体重都更好。然而,无论孵化亲鸟的处理状态如何,由处于加热环境中的雌性喂养的大龄雏鸟保持了更好的状况和体重。这些结果表明,对一个生活史阶段的投入可以通过多种途径对未来生活史阶段产生遗留效应。