Incubation temperature fluctuation does not affect incubation length and hatchling phenotype in the Chinese skink Plestiodon chinensis.
Incubation temperature fluctuation does not affect incubation length and hatchling phenotype in the Chinese skink Plestiodon chinensis.
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DOI：
10.1016/j.jtherbio.2014.09.008
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发表时间：
2014-12
影响因子：
2.7
通讯作者：
Yan‐Fu Qu;Hong-Liang Lu;Hong Li;X. Ji
中科院分区：
文献类型：
--
作者：
Yan‐Fu Qu;Hong-Liang Lu;Hong Li;X. Ji
考察孵化温度波动对爬行动物幼体表型影响的研究显示了物种差异。为了研究孵化温度波动是否对中国石龙子（Plestiodonchinensis）的表型有关键作用，我们在5种温度条件下（处理）孵化了20只雌性石龙子的卵。三种处理的鸡蛋在三个孵化器中孵育，一个设定为27 °C恒定，两个设定为27±3 °C和27±5 °C，周期为12小时（+）和12小时（-）。剩下的蛋在两个室内孵化：一个在室内，温度从23.0 ° C到31.1 °C变化，平均温度为27.0 °C;另一个在室外，温度从20.2 ° C到35.3 °C变化，平均温度为26.1 °C。我们发现：（1）对于产卵时处于给定胚胎期的卵，孵化温度的平均值而不是方差决定了孵化时间的长短;卵重、产卵时的胚胎期、孵化期以及除尾长和运动性能外的所有孵化性状均受窝卵数的影响;（3）体质量是5个处理间唯一存在差异的幼体性状，但差异很小。这些结果表明，孵化温度波动对P的孵化长度和孵化表型没有直接影响。中国。
Studies examining the effects of incubation temperature fluctuation on the phenotype of hatchling reptiles have shown species variation. To examine whether incubation temperature fluctuation has a key role in influencing the phenotype of hatchling Chinese skinks (Plestiodonchinensis), we incubated eggs produced by 20 females under five thermal regimes (treatments). Eggs in three treatments were incubated in three incubators, one set constant at 27 °C and two ramp-programmed at 27±3 °C and 27±5 °C on a cycle of 12 h (+) and 12 h (−). The remaining eggs were incubated in two chambers: one inside a room where temperatures varied from 23.0 to 31.1 °C, with a mean of 27.0 °C; the other outside the room where temperatures varied from 20.2 to 35.3 °C, with a mean of 26.1 °C. We found that: (1) for eggs at a given embryonic stage at ovipositon, the mean rather than the variance of incubation temperatures determined the length of incubation; (2) most (egg mass, embryonic stage at oviposition, incubation length and all examined hatchling traits except tail length and locomotor performance) of the examined variables were affected by clutch; and (3) body mass was the only hatchling trait that differed among the five treatments, but the differences were tiny. These findings suggest that incubation temperature fluctuation has no direct role in influencing incubation length and hatchling phenotype inP. chinensis.