Table 1 Bulk δ¹³C and δ¹⁵N values (means ± standard deviation) of nine selected primary consumers.

		Code	n	δ¹³C‰	δ¹⁵N‰
Invertebrates
Ascidiidae	Ascidian	Asc	2	− 17.8 ± 1.2	14.6 ± 0.3
Ascidiidae	Ascidian	Asc	15	− *18.7* ± *0.4*	*15.1* ± *1.1*
Clionaidae	Spheciospongia sp.	Spsp	28	− 18.1 ± 0.5	15.8 ± 0.6
Clionaidae	Spheciospongia sp.	Spsp	16	− *17.7* ± *0.3*	*16.1* ± *0.5*
Pteriidae	Pinctada margaritifera	Pima	7	− 16.7 ± 0.4	15.2 ± 0.5
Pteriidae	Pinctada margaritifera	Pima	17	− *17.0* ± *0.3*	*14.5* ± *0.4*
Cypraeidae	Mauritia spp.	Maspp	5	− 15.3 ± 1.1	15.8 ± 0.2
Cypraeidae	Mauritia spp.	Maspp	8	− *16.4* ± *0.6*	*16.6* ± *0.9*
Zooplankton	300–500 µm	Zoo-300	9	− 19.6 ± 0.3	12.6 ± 0.9
	300–500 µm	Zoo-300	12	− *20.2* ± *0.5*	*14.9* ± *1.1*
	1000–2000 µm	Zoo-1000	12	− 19.4 ± 0.5	14.1 ± 0.5
	1000–2000 µm	Zoo-1000	16	− *19.2* ± *0.7*	*17.4* ± *0.5*
Fish
Acanthuridae	Acanthurus nigricans	Acni	11	− 19.6 ± 2.7	17.0 ± 0.8
	Acanthurus nigricans	Acni	14	− *17.7* ± *1.9*	*16.1* ± *0.9*
	Ctenochaetus marginatus	Ctma	25	− 14.0 ± 1.3	19.1 ± 1.0
	Ctenochaetus marginatus	Ctma	13	− *13.9* ± *1.2*	*17.4* ± *1.5*
Scarinae	Scarus koputea	Scar	4	− 17.7 ± 0.2	19.0 ± 0.3
	Scarus koputea		9	− *14.9* ± *1.2*	*16.4* ± *1.2*
	S. rubroviolaceus		8	− 16.6 ± 1.2	18.8 ± 1.1

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