Is coexistence between non-native and native Erythrinidae species mediated by niche differentiation or environmental filtering? A case study in the upper Paraná River floodplain Author Pereira, Larissa S. Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, Universidade Estadual de Maringá, Av. Colombo 5790, 87020 - 900 Maringá, PR, Brazil lari.strictar@gmail.com Author Mise, Fábio T. Universidade de São Paulo, USP, Ribeirão Preto. Av. Bandeirantes, 3900, 14049 - 900 Monte Alegre, Ribeirão Preto, SP, Brazil fabio_mise@hotmail.com Author Tencatt, Luiz F. C. Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, Universidade Estadual de Maringá, Av. Colombo 5790, 87020 - 900 Maringá, PR, Brazil luiztencatt@hotmail.com Author Baumgartner, Matheus T. Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, Universidade Estadual de Maringá, Av. Colombo 5790, 87020 - 900 Maringá, PR, Brazil matheus_tbs@hotmail.com Author Agostinho, Angelo A. Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, Universidade Estadual de Maringá, Av. Colombo 5790, 87020 - 900 Maringá, PR, Brazil & Núcleo de Pesquisas em Limnologia, Ictiologia eAquicultura, Universidade Estadual de Maringá, Av. Colombo 5790, 87020 - 900 Maringá, PR, Brazil agostinhoaa@nupelia.uem.br text Neotropical Ichthyology 2017 2017-07-03 15 2 e 160142 e 160142 http://dx.doi.org/10.1590/1982-0224-20160142 journal article 10.1590/1982-0224-20160142 1982-0224 20127853

Tab. 2. Pearson’s correlation coefficients (r) obtained among the ecomorphological indices for axes 1 and 3 of the principal components analysis (PCA) applied to the correlation matrix formed by 19 indices describing nonnative (H. mbigua and H. unitaeniatus) and native (Hoplias sp. B and H. cf. malabaricus) Erythrinidae species. At the lower level, the eigenvalues predicted by the broken-stick model and the proportions of the accumulated and explained variability are described. The indices with higher correlation values (in bold) were selected for interpretation.

Ecomorphological indices	PCA axes
	r PC 1	r PC 3
Aspect ratio of anal fin	-0.32	-0.15
Aspect ratio of caudal fin	-0.32	-0.06
Aspect ratio of pectoral fin	-0.27	-0.20
Aspect ratio of pelvic fin	-0.31	-0.05
Compression index	-0.08	0.26
Compression index of caudal peduncle	-0.25	0.31
Depression index	0.23	0.12
Eye position	0.28	-0.14
Relative area of dorsal fin	0.32	0.23
Relative area of eye	0.30	0.22
Relative height of anal fin	0.12	-0.34
Relative height of body	-0.02	0.38
Relative height of caudal peduncle	-0.25	-0.14
Relative height of dorsal fin	0.16	-0.25
Relative height of head	-0.25	0.07
Relative length of caudal peduncle	-0.07	0.25
Relative length of head	-0.01	0.34
Relative width of caudal peduncle	0.17	-0.29
Relative width of head	-0.17	0.14
Predicted eigenvalue: broken-stick	3.55	2.05
Eigenvalue	5.32	2.20
Explained variability (%)	28.01	11.56
Accumulated variability (%)	28.01	39.56