Rothtacker

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Reotaxia - reaction to the direction of movement of the liquid medium. It occurs, for example, in protozoa living in a fast-flowing environment, as well as in parasitic forms, in the circulatory system, in the gills or in the excretory system. Positive reotaxia - the object moves in the opposite direction of the liquid movement, negative reotaxia - according to the current. Fish reotaxis - this is the behavior of fish in the current of water. Fish usually show positive reotaxia, ie they turn their heads in the direction of current and swim forward without being able to endure water. The reotaxis phenomenon is related to the action of three sensory organs of fish: sight, touch, lateral line. Sight is decisive here.

Example: sperm in the female genital tract penetrate the egg. positive reotaxis. Bibliography

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