Molluscan Research 26(1):
39-50; published 22 May 2006
Copyright © The
Malacological Society of Australasia
Diet and predation behaviour
exhibited by Cominella eburnea
(Gastropoda:
Caenogastropoda: Neogastropoda) in Princess
Royal Harbour, Albany, Western Australia,
with a review of attack strategies in the Buccinidae
BRIAN MORTON
Department of Zoology,
The Natural History Museum, Cromwell Road, London SW7 5BD, UK.
Email; prof_bsmorton@hotmail.com
Abstract
It is generally believed
that representatives of the predatory Buccinidae gain access to their
prey by means other than drilling. It has
been reported in the literature, however, that in southwest Western
Australia, the buccinid whelk, Cominella
eburnea, drills its
bivalve prey. Field records of C.
eburnea attacks in Princess Royal
Harbour showed that the species feeds principally upon the
venerid bivalve Katelysia
scalarina (123 records) but also
upon a range of sympatric gastropods (seven records), and always
by either marginal (K. scalarina)
or apertural (gastropods) access using the proboscis. Forty one
observations of C. eburnea
attacking K.
scalarina in the laboratory,
similarly by marginal proboscis insertion, substantiate these records:
drilling was never observed. In the
absence of an accessory boring organ (ABO) in representatives of the
Buccinidae, predation (upon a wide
variety of prey) has usually been believed to be by means other than
drilling. Previous records of C.
eburnea drilling prey
in the laboratory and other reports of congenerics doing this in the
field in New Zealand, however, suggest that in some situations
and under some circumstances, drilling is possible, as demonstrated
for post-juveniles of Nassarius
festivus (Nassar-iidae). Representatives
of the diverse and ecologically important southern hemisphere genus Cominella
should be examined more
rigorously in terms of feeding behaviours.
Full article (PDF;
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