The influence of gravity and light on locomotion and orientation of Heterocypris incongruens and Notodromas monacha (Crustacea, Ostracoda)

a Scheme of the μg-specific looping behavior displayed by H. incongruens as well as N. monacha, during which the ventral side of the animals is pointing toward the center of the actively performed circles; b passive rotation of H. incongruens caused by clinorotation, when the ostracods show drifting behavio