Browsing by Author "Serra, G"
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- ItemEffects of experience and risk of predation on the foraging behaviour of the South-eastern Pacific muricid Concholepas concholepas (Mollusca: Gastropoda)(1997) Serra, G; Chelazzi, G; Castilla, JC1. Different size classes of the muricid Concholepas concholepas (Bruguiere)(small and medium subadult specimens inhabiting mainly the high-and mid-intertidal, and large adult ones inhabiting mainly the subtidal) were assessed for handling times and diet selection by offering them three different sizes of the high-intertidal mussel Perumytilus purpuratus (Lamarck).
- ItemTemporal and spatial activity of the key-hole limpet Fissurella crassa (Mollusca: Gastropoda) in the eastern Pacific(2001) Serra, G; Chelazzi, G; Castilla, ACAn automated photographic technique was used to collect quantitative information on the activity patterns of Fissurella crassa under heavy-exposed sea conditions. The activity of this key-hole limpet was confined to nocturnal low tides. Total length of excursions was significantly greater during spring tides than neap tides, as was the maximum distance reached fi,om the refuge. Total duration of excursions and their average speed did not vary significantly according to the spring/neap cycle. While the direction angle of excursions relative to the refuge was not influenced significantly by the spring/neap cycle, the lowest zone within the intertidal was reached by F. crassa during spring low tides only.