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Biol Bull 64: 70-85. (February 1933)
© 1933 Marine Biological Laboratory
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REGENERATION IN THE CARAPACE OF DAPHNIA MAGNA

I. THE RELATION BETWEEN THE AMOUNT OF REGENERATION AND THE AREA OF THE WOUND DURING SINGLE ADULT INSTARS

BERTIL GOTTFRID ANDERSON 1

1 BIOLOGICAL LABORATORY, WESTERN RESERVE UNIVERSITY

1. This report deals with a study of the amount of regeneration in the carapace of Daphnia magna.

2. The amount of regeneration during any adult instar is a parabolic function of the area of the wound during that instar and may be expressed by the equation [see equation in PDF file] where y is the amount of regeneration; x, the area of the wound; and a and k constants.

3. The amount of regeneration during any adult instar decreases with the age of the animal.

4. The amount of regeneration during adult instars is independent of the temperature.

5. The amount of regeneration during any adult instar decreases with the age of the wound but to a greater extent than when the age of the animal alone is considered.

6. These results have been discussed with reference to those secured by others for relatively complex structures.






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