SEX DETERMINING TEMPERATURES IN TURTLES - A GEOGRAPHIC COMPARISON
SEX DETERMINING TEMPERATURES IN TURTLES - A GEOGRAPHIC COMPARISON
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DOI：
10.1111/j.1558-5646.1982.tb05048.x
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发表时间：
1982-01-01
期刊：
影响因子：
3.3
通讯作者：
MCCOY, CJ
中科院分区：
文献类型：
--
作者：
BULL, JJ;VOGT, RC;MCCOY, CJ
在许多海龟中，孵化出的海龟的性别是由蛋的孵化温度决定的，温暖的温度会导致雌性，而凉爽的温度会导致雄性。种群的性别比取决于环境温度、母体对巢址的选择和胚胎对性别决定的控制的交互作用。如果环境温度在种群之间不同，那么性比选择预计会调整母体行为或胚胎温度敏感性，从而在不同种群中产生几乎相同的性比。为了验证这一假设的一部分，性别决定温度之间的胚胎emydid海龟在美国北方和南部进行了比较。南方种群的胚胎应在比北方种群更高的温度下发育为雄性。在北方和南方物种之间的许多可能的比较中，数据并没有支持这一预测。这些数据实际上反驳了南北种内比较的预测。需要进一步研究，特别是在不同的人群中的巢温度。
In many turtles the hatchling''s sex is determined by the incubation temperature of the egg, warm temperatures causing femaleness and cool temperatures maleness. The population sex ratio depends upon the interaction of environmental temperature, maternal choice of nest site and embryonic control of sex determination. If environmental temperature differs between populations, then sex ratio selection is expected to adjust either maternal behavior or embryonic temperature-sensitivity to yield nearly the same sex ratio in the different populations. To test this hypothesis in part, sex determining temperatures were compared among embryos of emydid turtles in the northern and southern USA. Embryos of southern populations should develop as male at higher temperatures than those of northern populations. The data offer no support for this prediction among the many possible comparisons between northern and southern species. The data actually refute the prediction in the North-South intraspecific comparisons. Further study is needed, in particular, of nest temperatures in the different populations.