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Biol Bull 122: 380-390. (June 1962)
© 1962 Marine Biological Laboratory
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THE SWIMMING PLANE OF THE CRUSTACTEAN MYSIDIUM GRACILE (DANA)

RUDOLF JANDER 1

1 Department of Zoology, Yale University, New Haven, Conn.

1. Mysidium gracile (Dana) tends to move within a plane, the swimming plane, which is oriented as nearly as possible perpendicular to the directions of light and gravity.

2. Horizontal illumination induces an orientation conflict which is resolved by maintaining the swimming plane in a slanted position intermediate between those positions dictated by the two stimuli.

3. The turning tendencies of the dorsal light reaction increase with increasing light intensities.

4. There is evidence that gravity- and light-induced turning tendencies inhibit each other.






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Copyright © 1962 by the Marine Biological Laboratory.