oa African Zoology - Variation in foraging activity of Acanthochitona garnoti(Mollusca: Polyplacophora) from different habitats

Volume 32, Issue 3
  • ISSN : 1562-7020
  • E-ISSN: 2224-073X



Foraging activity of Acanthochitona garnoti was studied during spring and neap tides in three different habitats: an aeolian sandstone platform, a permanent high-shore rock pool (aeolian shore) and a quartzitic sandstone boulder shore. On exposed rock, A. gamot; was active only during nocturnal low tides, although some individuals were active during early morning low tides when in shade. Chitons from upper-shore pools were active during both day and night low tides. At all sites chitons foraged for longer and travelled further during a spring tide new moon and least on a spring tide full moon. Chitons on the boulder beach travelled greater distances during foraging than those from aeolian shores. It is suggested that this is a result of boulder beach chitons having further to travel to find a grazing patch. Finally, A. gamoti was found to have a ranging pattern of activity on boulder shores and a homing pattern on aeolian shores.

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