Adaptative Differences in the Egg Membranes of Frogs
Adaptative Differences in the Egg Membranes of Frogs
复制标题
青蛙卵膜的适应性差异
DOI：
10.1086/280874
复制
发表时间：
1940
期刊：
影响因子：
--
通讯作者：
J. A. Moore
中科院分区：
文献类型：
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作者：
J. A. Moore
温度在限制地理分布方面的影响在许多动物群体中是明显的。一个物种将是一个地区的特点，那里的温度波动在一定的平均值，而另一个是在温暖或寒冷的条件下发现。为了阐明这一问题的某些方面，人们正在研究栖息在北美东北部的Salidopterus属蛙的成员之间的生理差异。这些蛙在它们的北方分布范围上不同，在它们产卵的时间上也不同。此前已证明（摩尔，1938年）胚胎温度耐受性存在显着差异，北方青蛙正常发育的最低和最高温度较低。此外，北方物种通过快速的生长速度补偿了低温环境对发育的延迟影响（表1）。本研究涉及的修改的果冻信封限制发育胚胎特定的温度conclitionis。
THE influence of temperature in limiting geographical distribution is apparent in many animal groups. One species will be characteristic of a region where the temperature fluctuates around a certain mean, while yet another is found under warmer or colder conditions. To throw light on some aspects of this problem a study is being made of physiological differences among members of the Salientian genus Rana that inhabit northeastern North America. These frogs differ in the extent of their northern distribution and, in a given locality in the time at which they spawn. It has previously been shown (Moore, 1938) that marked differences exist in the embryonic temperature tolerance, northern frogs having lower minimal and maximal temperatures for normal development. Furthermore, northern species compensate for the retarding influence of the low temperature of their environment on development, by a rapid rate of growth (Table 1). The present study is concerned with modifications of the jelly envelopes which limit the developing embryos to particular temperature conclitionis.