Chemical recognition by hermit crabs of their symbiotic sea anemones and a predatory octopus
- Department of Biological Sciences, Florida Atlantic University, 33431-0991, Boca Raton, Florida, USA
The ability of the hermit crabs Dardanus venosus and Pagurus pollicaris to recognize chemically their symbiotic sea anemone Calliactis tricolor and a common octopus predator, Octopus joubini, were studied. The crabs were tested for chemoreceptive responses using a Y-trough olfactometer, which prevented visual cues from being used. Choice tests showed that D. venosus could chemically detect Calliactis. If, however, D. venosus had a Calliactis on its shell at the time of the trial, it could not detect the test anemone. P. pollicaris (without a symbiotic anemone) did not locate the test anemone. Both species of crab avoided a water current carrying octopus chemical cues. Chemoreception may play an important role in the interaction of a hermit crab with its symbiotic anemone and an octopus predator.
- 1 - sciences appliquees, technologies et medecines
- 2 - sciences biologiques et medicales
- 3 - sciences biologiques fondamentales et appliquees. psychologie
- 4 - psychologie. psychophysiologie