Détail de la notice
Titre du Document
First report of cannibalism in Triplofusus giganteus (Gastropoda: Fasciolariidae)
Auteur(s)
DIETL Gregory P.
Résumé
The horse conch Triplofusus giganteus Kiener is the largest predatory gastropod in the western Atlantic (Abbott, 1974). In Florida, the major prey items in the diet of T. giganteus are other gastropods and bivalves (Menzel and Nichy, 1958; Hathaway and Woodburn, 1961; Paine, 1963a,b; Kent, 1983; Kuhlmann, 1994). Observations of the feeding biology of T. giganteus and other large-sized fasciolariid species indicate a preference for gastropods over bivalves (Risbec, 1932; Wells, 1958; Paine, 1963a, 1966; Maes, 1967; Jory, 1985; Stupakoff, 1986; Edward et al., 1992). Wells (1958) was the first to report on the prey-handling behavior of T. giganteus, which is very similar to that of Fasciolaria hunteria. He stated that when attacking gastropod prey, the predator attaches firmly to the operculum of its victim, preventing the characteristic withdrawal of soft parts to the relative safety of the shell. While holding the prey in the expanded condition, the predator rasps and devours the soft parts except the columellar muscle attached to the operculum. Cannibalism, or intraspecific predation, has been observed in the genus Fasciolaria (Wells, 1958; Paine, 1963a; Wells 1970; Snyder and Snyder, 1971; Table 1). However, there are no reports of cannibalism in members of the closely related taxa, Triplofusus and Pleuroploca. This brief note is the first to document the occurrence of cannibalism in Triplofusus.
Editeur
Allen
Identifiant
ISSN : 0007-4977 CODEN : BMRSAW
Source
Bulletin of marine science A. 2003, vol. 73, n° 3, pp. 757-761 [5 pages] [bibl. : 17 ref.]
Langue
Anglais
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