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Biol Bull 145: 159-170. (August 1973)
© 1973 Marine Biological Laboratory
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NEURAL CONTROL OF MIGRATION OF PROXIMAL SCREENING PIGMENT BY RETINULAR CELLS OF THE SWIMMING CRAB CALLINECTES SAPIDUS

CAROL LUDOLPH 1, DAVID PAGNANELLI 1, and MICHAEL I. MOTE 1

1 Department of Biology, Temple University, Philadelphia, Philadelphia 19122 and Marine Biological Laboratory, Woods Hole, Massachusetts 02543

1. The position of proximal screening pigment (PSP) located in retinular cells of the compound eye of the crab Callinectes sapidus was assessed histologically after selective adaptation with plane polarized light.

2. The results showed the pigment position to be different within the cells of a single ommatidium.

3. The pigment position was similar in cells of that ommatidium which shared a common microvillar axis and different from those that did not.

4. The pattern of pigment distribution was similar in several adjacent ommatidia.

5. Serial sections showed that the pigment in cells sharing a common microvillar axis extended more distally than those that did not after a polarized adapting stimulus.

6. These results support the hypothesis that the migration of PSP is under neural control of the retinular cell where it is found and independent of activity in other cells in the same ommatidium or eye.






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Copyright © 1973 by the Marine Biological Laboratory.