Competition and cooperation among huddling infant rats.
Competition and cooperation among huddling infant rats.
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挤在一起的幼鼠之间的竞争与合作。
DOI：
10.1002/dev.1030
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
Blumberg,MS
中科院分区：
文献类型：
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作者：
Sokoloff,G;Blumberg,MS
蜷缩是由婴儿大鼠表达，并继续在整个成年期的重要行为。作为行为体温调节的一种形式，蜷缩被认为在补偿发育早期生理体温调节不足方面发挥重要作用。然而，新生大鼠在出生后不久就能够利用棕色脂肪组织（BAT）产生热量，并在蜷缩时表现出产热作用，这表明蜷缩并不妨碍在冷暴露期间进行恒温。在本实验中，将4只幼崽（2或8日奥尔兹）挤在一起暴露于两个亚热中性温度下，每个挤在一起的大鼠中有0、2或4只BAT产热受到抑制。BAT产热的抑制损害了幼崽保持蜷缩温度的能力，但令人惊讶的是，在任何年龄都没有导致蜷缩的增强。这些结果表明，有效的蜷缩在冷暴露期间需要由吸热提供的热资源。此外，BAT提供的热量似乎在发育过程中塑造了蜷缩在一起的行为互动。John Wiley & Sons，Inc. Dev Psychobiol 39：65-75，2001
Huddling is expressed by infant rats and continues to be an important behavior throughout adulthood. As a form of behavioral thermoregulation, huddling is thought to play an essential role in compensating for inadequate physiological thermoregulation early in development. Infant rats, however, are capable of heat production shortly after birth using brown adipose tissue (BAT) and exhibit thermogenesis in the huddle, suggesting that huddling does not obviate the need for endothermy during cold exposure. In the present experiment, 4‐pup huddles of infant rats (2‐ or 8‐day‐olds) were exposed to two subthermoneutral temperatures, and BAT thermogenesis was inhibited in 0, 2, or 4 of the rats in each huddle. Inhibition of BAT thermogenesis compromised the pups' ability to maintain huddle temperature, but surprisingly did not result in enhanced huddling at either age. These results suggest that effective huddling during cold exposure requires the thermal resources provided by endothermy. Furthermore, the heat provided by BAT appears to shape behavioral interactions in the huddle during development. © 2001 John Wiley & Sons, Inc. Dev Psychobiol 39: 65–75, 2001