Substratum Slope and the Alignment of Acute Zones in Semi-terrestrial Crabs ( Ocypode Ceratophthalmus )

The organisation of the visual system in semi-terrestrial crabs is related to the three-dimensional structure of the environment (Zeil et al. 1986; Nalbach and Nalbach, 1987; Nalbach et al. 1989a,b; Zeil et al. 1989). In species that live in flat habitats like sandy ocean beaches or mudflats we find: (1) long, vertically oriented eye stalks; (2) a small… CONTINUE READING