Differences in the activity rhythms of juvenile gobiid fish,Chasmichthys gulosus, from different tidal localities

Abstract

Activity patterns of intertidal gobiid fish, Chasmichthys gulosus, collected from different tidal localities, were recorded in a constant environment. Gobies collected from a rocky shore with a large tidal range and a regular tidal regime displayed a ca. 12 hour rhythm in their activity pattern. Gobies from a rocky shore with a small tidal range and an irregular tidal regime, however, did not clearly display any