Selection in Cladocera On the Basis of a Physiological Character
The book Selection in Cladocera On the Basis of a Physiological Character was written by author Arthur Mangun Banta Here you can read free online of Selection in Cladocera On the Basis of a Physiological Character book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Selection in Cladocera On the Basis of a Physiological Character a good or bad book?
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The 9 same-day broods for this period gave as mean reaction-times 607 and 632 seconds, the difference being -25 ±31. 18 seconds. A test series was conducted in April 1914. There were 653 individuals of the plus strain and 614 of the minus strain. The mean reaction-times were 666. 4 and 711. 9 seconds. The difference was -45. 5 ±10. 9 seconds, or 4. 17 times the probable error. There is a suggestion of an effect of selection for this year-period in that the data as a whole, the data for the same...-day broods, and the test- series data all show higher reaction-times for the minus strain. But in view of the later data this evidence is overruled. For the next year-period (August 1914-July 1915) the mean reaction-times (452 and 454 individuals) were 642. 5 and 607. 7. The difference (+34. 8 ±13. 8 seconds) is 2. 52 times the probable error. Hence the difference is of statistical interest, but is opposed to an effect of selection. There were only 3 same-day broods for this year- period for which the mean reaction-times were 834 and 815 seconds.
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