QUICK SEARCH:   [advanced] Author: Keyword(s):
Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by BEAUCHAMP, R. S. A. Search for Related Content PubMed Articles by BEAUCHAMP, R. S. A.

Journal of Experimental Biology 10,113-129 (1933)
Published by Company of Biologists 1933

Rheotaxis in Planaria Alpina

R. S. A. BEAUCHAMP ¹

¹ Laboratory of the Freshwater Biological Association of the British Empire

1. Pl. alpina is normally active in the evening and quiescent during the day.

2. Pl. alpina is shown to become positively rheotactic when developing sexually, but becomes negatively rheotactic on completing the sexual cycle.

3. Starvation leads to de-differentiation and the loss of positive rheotaxy.

4. Feeding produces a temporary positive rheotaxy and a temporary negative geotaxy.

5. Continued feeding leads, if temperature conditions are suitable, to the redevelopment of those characters which produce positive rheotaxy in sexual individuals.

6. The development and consequently the behaviour of Pl. alpina is controlled by temperature and the food supply.

7. Considerable migrations up and down the stream are brought about by changes in the animal's behaviour.