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Serotonin, but not dopamine or octopamine, modifies locomotor and phototaxic behavior of the crab, Carcinus maenas
- McPhee, M. J., Wilkens, J. L.
- Canadian journal of zoology 1989 v.67 no.2 pp. 391-393
- Carcinus maenas, crabs, dopamine, hemolymph, octopamine, phototaxis, posture, rocks, sand, serotonin
- During daylight hours, shore crabs (Carcinus maenas) are strongly photonegative and spend most of the time (76%) hidden under rocks or buried in the sand. After circulating levels of serotonin in the hemolymph were increased to 10⁻⁶ mol∙L⁻¹ photonegative behavior was reduced (32%) and crabs spent most of the time (68%) moving in a more or less nondirected fashion. High doses of serotonin (10⁻⁴ mol∙L⁻¹) caused extreme leg flexion. Low or high doses of dopamine and octopamine did not modify posture or phototaxis.