Adaptive visually‐mediated movements of Littorina irrorata (Mollusca: Gastropoda) when displaced from their natural habitat

摘要: Littorina irrorata displaced from their natural location amid plant stems in the upper inter‐tidal zone to areas of intertidal devoid vegetation, oriented onshore under all sky and light conditions tested. The responses snails tested experimental arenas indicated that substrate slope 3 degrees was ignored favor movement toward a black paper rectangle. Subsequent releases on supported conclusion onshore‐oriented response resulted visual perception dark area (bushes trees near high tide line). Where vegetation equally tall directions, closest regardless actual direction.