Abstract
The behavior and horizontal dispersal of larvae of the wild mulberry silkworm Bombyx mandarina, the domesticated silkworm B. mori, and their F1 hybrid were compared in the laboratory. B. mandarina larvae moved out of an experimental arena faster than B. mori and the hybrid. They tended to remain motionless for a period, and then quickly move out of the arena, whereas F1 hybrids spent a longer time moving around before leaving the arena, and B. mori larvae showed frequent and short movements without changes in position. These results suggest that domestication has led to behavioral changes that affect horizontal dispersal.
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