Skip to Main Content
GEOREF RECORD

Predation of experimentally deployed molluscan shells from shelf to slope depths in a tropical carbonate environment

Sally E. Walker, Karla M. Parsons-Hubbard, Eric N. Powell and Carlton E. Brett
Predation of experimentally deployed molluscan shells from shelf to slope depths in a tropical carbonate environment
Palaios (April 2002) 17 (2): 147-170

Abstract

Predation was examined using experimentally deployed shells along two transects representing shallow shelf (15 to 30 m), outer shelf (70 m) and bathyal (100 m to 267 m) habitats in the Bahamas. Lethal breakage on experimentally tethered shells was not restricted to the shallow-shelf (< or =30 m), but could occur to outer shelf (70 m) and upper slope (> or =88 m) depths. However, significantly more shells were preyed on at shallow-shelf depths (< or =30 m) than at deeper depths (> or =70 m) for both transects. Predation was not restricted to shelf sites (< or =70 m), and predator-induced damage, such as peeled shells or last whorl remnants, could be encountered to a depth of 195 m. However, significantly more predation occurred at shelf rather than slope (> or =88 m) depths for both transects. Although the experimental shells were exotic species, they were preyed upon at differing frequencies depending upon transect location and depth. It appears that morphology alone may not account for the differences in predation. Long-term deployment (six years) of shells enhanced the likelihood of predation, but short term deployment (one or two years) did not. Molluscivorous predators in the Caribbean are highly diverse and are not restricted to the shallow shelf, but occur in outer shelf to slope settings. Therefore, evolutionary-ecological conclusions based on predation with depth should not be tied to a single site, to a few depths, or to a single predator, as habitat heterogeneity and patchiness in predator and prey distributions may vary.


ISSN: 0883-1351
Serial Title: Palaios
Serial Volume: 17
Serial Issue: 2
Title: Predation of experimentally deployed molluscan shells from shelf to slope depths in a tropical carbonate environment
Affiliation: University of Athens, Department of Geology, Athens, GA, United States
Pages: 147-170
Published: 20020401
Text Language: English
Publisher: Society of Economic Paleontologists and Mineralogists, Tulsa, OK, United States
References: 87
Accession Number: 2006-007798
Categories: Invertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: Includes appendices
Illustration Description: illus. incl. geol. sketch map
N23°46'51" - N23°46'51", W76°06'22" - W76°06'22"
Secondary Affiliation: Oberlin College, USA, United StatesRutgers University, USA, United StatesUniversity of Cincinnati, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 200604
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal