Factor that it becomes that influences the cold-blooded animal to evolve It is determined that - bear children-

Factor that it becomes that influences the cold-blooded animal to evolve It is determined that - bear children-
Factor that it becomes that influences the cold-blooded animal to evolve It is determined that - bear children-
A scientific paper published recently in British Nature is called, one the intersection of Tasmania and lizard can determine whether to beed the male offspring or female offspring on the basis of difference of climatic conditions. It's time to find that shows, climatic change has already become the important factor of influencing the evolution course of a lot of cold-blooded animals. This kind is called the snow lizard (SnowSkink) Live mainly Tasmania island in Australia, distributed on warm lowland and cold plateau. Researcher, Oxford University of British, find, have an elevation of 1000 meters about area, the snow lizard has no prominent bearing the gender to have a partiality for, its gender of progeny is more balanced in proportion, the male and female are roughly about equal in quantity; In lower area above sea level, the bearing the gender of snow lizard has a partiality for more obvious, in a situation that reproduction is in the sombre climate in period, its offspring that bears is mostly male, and if the climate is warm during reproduction, offsprings who they will bear are mostly female. Researchers point out, influenced by environment, the snow lizard has already evolved to and depended on the stage that two kinds of factors determine offspring's gender: One kind is inherent cause, another kind is a temperature factor. The reason why they choose to bear the female offspring under the warm condition, because under this kind of climate environment, the lizard will grow faster, the size will be a little bigger too. The size is very important for female lizard in size, but seem unimportant to the male lizard. Researchers say, should find that help a scientist to understand the impact on animal's habits and acquired characteristics of the climate, and how animal's population carried on hasty transition in different gender determine the mechanisms. The beeding the characteristic of snow lizard shows, when a certain offsprings of gender occupied the advantage in growth, some cold-blooded animals will evolve out the corresponding gender of progeny has a partiality for the mechanism, and the climate is undoubtedly the most common reason facilitating one gender offspring to occupy the advantage, climatic change becomes the important factor of influencing this evolution. (reporter Liu HaiYing)


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