The influence of incubation temperature on size, morphology, and locomotor performance of hatchling grass lizards (Takydromus wolteri)
The influence of incubation temperature on size, morphology, and locomotor performance of hatchling grass lizards (Takydromus wolteri)
复制标题
作者：
Pan Zhi
我们在4种恒温条件下对沃氏泥鳅卵进行孵育，以评估孵育温度对孵化后卵的大小、形态和运动性能的影响。所有的活卵在孵化过程中都是大量孵化的，因为它们从周围环境中吸收了水分，而质量的增加取决于卵的初始质量和孵化温度。24、27、30和33℃孵育时间平均分别为41.9、30.6、25.8和22.6 d。孵育温度对孵化成功率、体湿质量、胴体干质量和残余蛋黄干质量均有显著影响，但对卵的性别比、总干质量、口鼻长度和尾长无显著影响。与33℃条件下相比，24℃和27℃条件下的孵化仔鸡的湿体质量和胴体干质量更高，孵化时未利用蛋黄量更少。孵育温度对雏鸟的一些生理性状有影响，24℃和27℃孵育的雏鸟无尺寸头长和宽度均大于33℃孵育的雏鸟，24℃孵育的雏鸟无尺寸鼓室直径均小于较高温度孵育的雏鸟。短跑速度与孵化大小（SVL）呈正相关，与尾长和孵化条件无关。低温（24和27℃）孵化的幼体运动性能明显优于高温（30和33℃）孵化的幼体。在孵化体中发现了腹鳞排数、尾长和后肢长度的性别差异，但这些性别差异与孵化温度无关。
We incubated eggs of Takydromus wolteri\% at four costant temperatures to assess influence of incubation temperature on size,morphology,and locomotor performance of hatchlings.All viable eggs incubated in mass over the course of incubation due to absorption of water from surroundings,and mass gain was dependent on initial egg mass and incubation temperature.The duration of incubation at 24,27,30,and 33 ℃ averaged 41.9,30.6,25.8,and 22.6 d,respectively.Incubation temperature significantly affected hatching success and body wet mass,carcass dry mass,and residual yolk dry mass of hatchlings,but it did not affect sex ratio,total dry mass,snout-vent length,and tail length of hatchlings.Compared to those from 33℃,hatchlings from 24℃ and 27℃ were greater in wet body mass and carcass dry mass,with a smaller quantity of yolk remaining unutilized at hatching.Incubation temperature affected some norphological traits of hatchlings,with hatchlings from 24℃ and 27℃ having larger size-free head length and width than did those from 33℃,and hatchlings from 24℃ generally had smaller size-free tympanum diameter than did those from higher temperatures.Sprint speed was positively correlated with hatchling size(SVL),but it was independent of tail length and hatchling condition.Locomotor performance of hatchlings from lower temperatures(24 and 27℃) was apparently better than that of those from higher temperatures (30 and 33℃).Between-sex differences in the row number of ventral scales,tail length,and hind-limb length were found in hatchlings,but these sexual dimorphisms were not related to incubation temperature.