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Predation by Miocene gastropods of the Chesapeake Group; stereotyped and predictable

Patricia H. Kelley
Predation by Miocene gastropods of the Chesapeake Group; stereotyped and predictable
Palaios (August 1988) 3 (4): 436-448


Extant shell-drilling naticid gastropods are highly selective predators, choosing prey in accord with a model based on relative cost:benefit ratios (Kitchell et al., 1981). However, prey are not evaluated based on individual experiences; drilling instead follows stereotyped rules that are not modified by training. Stereotyped behavior of extant naticids includes selectivity of drillhole site on the prey shell and prey size. Such stereotypy may have developed over geologic time. This study determines whether predation by Miocene naticid gastropods of the Chesapeake Group was stereotyped and predictable by the Kitchell et al. (1981) model. Predation by Chesapeake Group naticids was highly selective with respect to prey size and drillhole site. This stereotypy increased the probability of successful predation by the naticids. Prey taxa showing the greatest selectivity of site and size also displayed the greatest rates of successful predation. Corbula exhibited the least size and site specificity and was preyed upon least successfully. Corbula is also the taxon for which predation was not readily predictable by the Kitchell et al. (1981) naticid prey preference model. The poor predictability of predation on Corbula is attributed to the presence of a conchiolin layer within the shell that may act as a deterrent to predation. Predation on four other prey genera was predictable by the model; naticids chose prey with the lowest cost:benefit ratios. Stereotypy of predation thus appears to have been well developed in the Miocene.

ISSN: 0883-1351
Serial Title: Palaios
Serial Volume: 3
Serial Issue: 4
Title: Predation by Miocene gastropods of the Chesapeake Group; stereotyped and predictable
Author(s): Kelley, Patricia H.
Affiliation: Univ. Miss., Dep. Geol. and Geol. Eng., University, MS, United States
Pages: 436-448
Published: 198808
Text Language: English
Publisher: Society of Economic Paleontologists and Mineralogists, Tulsa, OK, United States
References: 29
Accession Number: 1989-020979
Categories: Invertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 6 tables
N37°55'00" - N39°43'00", W79°30'00" - W75°04'60"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by SEPM (Society for Sedimentary Geology), Tulsa, OK, United States
Update Code: 1989
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