Local-scale resource partitioning by stingrays on an intertidal flat

Pardo, Sebastian A., Burgess, Katherine B., Teixeira, Daniella and Bennett, Michael B. (2015) Local-scale resource partitioning by stingrays on an intertidal flat. Marine Ecology Progress Series, 533 205-218. doi:10.3354/meps11358

Author Pardo, Sebastian A.
Burgess, Katherine B.
Teixeira, Daniella
Bennett, Michael B.
Title Local-scale resource partitioning by stingrays on an intertidal flat
Journal name Marine Ecology Progress Series   Check publisher's open access policy
ISSN 0171-8630
Publication date 2015-08-06
Sub-type Article (original research)
DOI 10.3354/meps11358
Open Access Status DOI
Volume 533
Start page 205
End page 218
Total pages 14
Place of publication Oldendorf, Germany
Publisher Inter-Research
Collection year 2016
Language eng
Formatted abstract
The partitioning of dietary resources is a potential mechanism by which competing species can coexist. We examined local-scale dietary partitioning among 3 sympatric stingrays, Neotrygon kuhlii, Dasyatis fluviorum and Himantura toshi, from an intertidal flat in Moreton Bay, Australia, and compared their diets to the benthic prey items at the site. Ordination of stomach contents revealed that the species’ diets differed significantly from each other and from the composition of potential prey items in their habitat, suggesting dietary partitioning among these species (ANOSIM, p < 0.001, R-statistic = 0.874). According to the index of relative importance (IRI), polychaetes were the most important prey for N. kuhlii (90.0% IRI), while D. fluviorum preferred brachyuran crabs (52.6% IRI) and H. toshi preferred carid shrimp (65.2% IRI). Size-related shifts in diet were investigated for N. kuhlii, and a weakly significant effect was detected, due to a decrease in importance of polychaetes and increased importance of carid shrimp and teleost fishes with increasing body size (ANOSIM, p < 0.001; R-statistic = 0.253). Jaw morphology was compared between D. fluviorum and N. kuhlii; D. fluviorum had a larger gape and a more molariform dentition than N. kuhlii, which may relate to preferences for epifaunal and infaunal prey, respectively. The results of this study suggest that N. kuhlii, D. fluviorum and H. toshi partition food resources at a local-scale within Moreton Bay, which likely facilitates their coexistence in this area.
Keyword Batoid
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Biomedical Sciences Publications
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