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1 From the Department of Zoölogy, Columbia University, New York City
1. Stages in embryo formation among Amphibia between yolk plug and gill circulation have similar time-temperature relations.
2. The time-temperature relation of cleavage, although constant from first to fourth cleavages, differs from that of embryo formation.
3. It is suggested that the different time-temperature relations of cleavage and of morphogenesis represent different controlling processes; while the similarity of the time-temperature relations among cleavages and among stages of later development is the expression of a common controlling process in each case. These controlling processes are probably parts of the respiratory metabolism and they prevent temperature from disorganizing development.
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  B. A. Bancroft, N. J. Baker, C. L. Searle, T. S. Garcia, and A. R. Blaustein Larval amphibians seek warm temperatures and do not avoid harmful UVB radiation Behav. Ecol., July 1, 2008; 19(4): 879 - 886. [Abstract] [Full Text] [PDF]
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