Ritmo d'attività e migrazioni di un Crostaceo Anfipodo (Talorchestia martensii Weber) sul litorale della Somalia
The distribution and displacement of a coastal Amphipod (Talorchestia martensii Weber) has been studied on a Somalian coast by means of glycol pit-fall traps. Abundant in the eu- and supra-littoral, sporadic in the extralittoral, this crustacean is chiefly but not exclusively active on the surface at night. Its displacements follow a complex rhythm with dual components: diurnal (descent after sunset, ascent before dawn) and tidal (descent after and ascent before high tide). The tidal migrations...