Diet of invasive pikeperch Sander lucioperca: developing non-destructive tissue sampling for stable isotope analysis with comparisons to stomach contents analysis | Knowledge and Management of Aquatic Ecosystems

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Table 3

Mean predicted dietary contributions from Bayesian mixing models of ‘Cyprinidae’, ‘Invertebrates’ and ‘Percidae’ to the diet of S. lucioperca by size class (<350 mm and >350 mm), showing standard deviation and 95% confidence limits. Mixing models were (1) consumer as muscle values, (2) consumer as mucus values, (3) consumer as scale values, (4) consumer as muscle values based on conversion using the linear models for δ¹³C and δ¹⁵N mucus to muscle, and (5) consumer as muscle values based on conversion using the linear models for δ¹³C and δ¹⁵N scale to muscle.

Resource	Model	I < 350 mm				II > 350 mm

		Mean	SD	2.5% CI	95.7% CI	Mean	SD	2.5% CI	95.7% CI
Cyprinidae	1	0.32	0.13	0.07	0.552	0.47	0.22	0.04	0.83
	2	0.23	0.11	0.03	0.459	0.45	0.21	0.02	0.79
	3	0.28	0.11	0.07	0.499	0.40	0.18	0.05	0.73
	4	0.27	0.11	0.07	0.498	0.40	0.20	0.04	0.76
	5	0.31	0.12	0.07	0.535	0.46	0.21	0.04	0.81
Invertebrates	1	0.46	0.1	0.26	0.646	0.27	0.14	0.06	0.60
	2	0.63	0.11	0.4	0.811	0.33	0.13	0.11	0.59
	3	0.50	0.09	0.33	0.668	0.31	0.09	0.13	0.50
	4	0.49	0.09	0.31	0.648	0.38	0.17	0.10	0.76
	5	0.47	0.09	0.27	0.65	0.28	0.13	0.06	0.58
Percidae	1	0.23	0.12	0.03	0.475	0.26	0.19	0.01	0.68
	2	0.15	0.10	0.01	0.375	0.22	0.18	0.004	0.64
	3	0.22	0.10	0.04	0.439	0.29	0.16	0.02	0.62
	4	0.24	0.1	0.05	0.443	0.23	0.16	0.02	0.59
	5	0.23	0.11	0.04	0.454	0.27	0.18	0.02	0.68

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