Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/16571
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | Sources of variation in the feeding ecology of the piked spurdog (Squalus megalops): implications for inferring predator - prey interactions from overall dietary composition |
Author: | Braccini, J. Gillanders, B. Walker, T. |
Citation: | ICES Journal of Marine Science: journal du conseil, 2005; 62(6):1076-1094 |
Publisher: | Academic Press Ltd Elsevier Science Ltd |
Issue Date: | 2005 |
ISSN: | 1054-3139 1095-9289 |
Statement of Responsibility: | J. Matías Braccini, Bronwyn M. Gillanders, and Terence I. Walker |
Abstract: | <jats:title>Abstract</jats:title> <jats:p>Sources of variation in dietary composition were examined in the piked spurdog (Squalus megalops). The species is an opportunistic predator that consumes a wide range of prey items. When importance of prey was measured by weight or occurrence, S. megalops preyed largely on molluscs and teleosts. However, when number of prey was considered, the main items were crustaceans. A bootstrap analysis showed that considerable variability can be expected in the importance of prey items in the species' overall diet. Regional, seasonal, and ontogenetic differences in dietary composition were found, but there were no differences between mature and immature sharks or between males and females. The spatial and temporal variation in diet exhibited by S. megalops and the intrinsic natural variability of the dietary composition of this opportunistic predator suggest that studies that infer predator–prey interactions from overall diet are likely to miss information on the ecological relationships among species and thus account for only part of these interactions.</jats:p> |
Keywords: | Australia diet predator–prey interactions shark variation |
Rights: | © 2005 International Council for the Exploration of the Sea |
DOI: | 10.1016/j.icesjms.2005.04.004 |
Published version: | http://dx.doi.org/10.1016/j.icesjms.2005.04.004 |
Appears in Collections: | Aurora harvest 2 Earth and Environmental Sciences publications Environment Institute Leaders publications |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.