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- W2973163677 endingPage "190599" @default.
- W2973163677 startingPage "190599" @default.
- W2973163677 abstract "Stable isotope analyses provide the means to examine the trophic role of animals in complex food webs. Here, we used stable isotope analyses to characterize the feeding ecology of reef manta rays ( Mobula alfredi ) at a remote coral reef in the Western Indian Ocean. Muscle samples of M. alfredi were collected from D'Arros Island and St. Joseph Atoll, Republic of Seychelles, in November 2016 and 2017. Prior to analysis, lipid and urea extraction procedures were tested on freeze-dried muscle tissue in order to standardize sample treatment protocols for M. alfredi . The lipid extraction procedure was effective at removing both lipids and urea from samples and should be used in future studies of the trophic ecology of this species. The isotopic signatures of nitrogen (δ 15 N) and carbon (δ 13 C) for M. alfredi differed by year, but did not vary by sex or life stage, suggesting that all individuals occupy the same trophic niche at this coral reef. Furthermore, the isotopic signatures for M. alfredi differed to those for co-occurring planktivorous fish species also sampled at D'Arros Island and St. Joseph Atoll, suggesting that the ecological niche of M. alfredi is unique. Pelagic zooplankton were the main contributor (45%) to the diet of M. alfredi , combined with emergent zooplankton (38%) and mesopelagic prey items (17%). Given the extent of movement that would be required to undertake this foraging strategy, individual M. alfredi are implicated as important vectors of nutrient supply around and to the coral reefs surrounding D'Arros Island and St. Joseph Atoll, particularly where substantial site fidelity is displayed by these large elasmobranchs." @default.
- W2973163677 created "2019-09-19" @default.
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- W2973163677 date "2019-09-11" @default.
- W2973163677 modified "2023-10-06" @default.
- W2973163677 title "Stable isotope analyses reveal unique trophic role of reef manta rays (<i>Mobula alfredi</i>) at a remote coral reef" @default.
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- W2973163677 doi "https://doi.org/10.1098/rsos.190599" @default.
- W2973163677 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6774984" @default.
- W2973163677 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31598296" @default.
- W2973163677 hasPublicationYear "2019" @default.
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