scholarly journals Functional connectivity of coral reef fishes in a tropical seascape assessed by compound-specific stable isotope analyses

2011 ◽  
Author(s):  
Kelton W. McMahon
Keyword(s):  
Coral Reef ◽  
Functional Connectivity ◽  
Stable Isotope ◽  
Reef Fishes ◽  
Coral Reef Fishes ◽  
Stable Isotope Analyses ◽  
Isotope Analyses

scholarly journals Stable isotope analyses reveal unique trophic role of reef manta rays ( Mobula alfredi ) at a remote coral reef

2019 ◽  
Vol 6 (9) ◽  
pp. 190599 ◽  
Author(s):  
Lauren R. Peel ◽  
Ryan Daly ◽  
Clare A. Keating Daly ◽  
Guy M. W. Stevens ◽  
Shaun P. Collin ◽  
...  
Keyword(s):  
Coral Reef ◽  
Stable Isotope ◽  
Trophic Ecology ◽  
Sample Treatment ◽  
Stable Isotope Analyses ◽  
Isotopic Signatures ◽  
Freeze Dried ◽  
Isotope Analyses ◽  
Trophic Role

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.

Identifying carbon sources and trophic position of coral reef fishes using diet and stable isotope (δ15N and δ13C) analyses in two contrasted bays in Moorea, French Polynesia

Coral Reefs ◽  
2013 ◽  
Vol 32 (4) ◽  
pp. 1091-1102 ◽  
Author(s):  
Y. Letourneur ◽  
T. Lison de Loma ◽  
P. Richard ◽  
M. L. Harmelin-Vivien ◽  
P. Cresson ◽  
...  
Keyword(s):  
Coral Reef ◽  
Stable Isotope ◽  
Trophic Position ◽  
Carbon Sources ◽  
Reef Fishes ◽  
French Polynesia ◽  
Coral Reef Fishes ◽  
Δ15n And Δ13c

Analytical pyrolysis and stable isotope analyses reveal past environmental changes in coralloid speleothems from Easter Island (Chile)

2016 ◽  
Vol 1461 ◽  
pp. 144-152 ◽  
Author(s):  
Ana Z. Miller ◽  
José M. De la Rosa ◽  
Nicasio T. Jiménez-Morillo ◽  
Manuel F.C. Pereira ◽  
José A González-Pérez ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Environmental Changes ◽  
Easter Island ◽  
Analytical Pyrolysis ◽  
Stable Isotope Analyses ◽  
Isotope Analyses
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