Colorful invasion in permissive Neotropical ecosystems: establishment of ornamental non-native poeciliids of the genera Poecilia / Xiphophorus (Cyprinodontiformes: Poeciliidae) and management alternatives Author Magalhães, André Lincoln Barroso Programa de Pós-graduação em Tecnologias para o Desenvolvimento Sustentável, Universidade Federal de São João Del Rei, Rodovia MG 443, KM 7, Fazenda do Cadete, 36420 - 000 Ouro Branco, MG, Brazil andrebiomagalhaes@gmail.com Author Jacobi, Claudia Maria Departamento de Biologia Geral, Universidade Federal de Minas Gerais, Avenida Antônio Carlos, 6227, 31270 - 901 Belo Horizonte, MG, Brazil jacobi@icb.ufmg.br text Neotropical Ichthyology 2017 2017-03-23 15 1 e 160094 e 160094 http://dx.doi.org/10.1590/1982-0224-20160094 journal article 10.1590/1982-0224-20160094 1982-0224 20088348

Tab. 2. Total absolute/relative frequencies and adult-to-juvenile ratio of ornamental non-native poeciliid species collected in the creeks in 2003, 2004, 2005 and 2006. Adult (♀+♂), juvenile (J). * Indicates the significant values for adult-to-juvenile ratio (Chi-square, P <0.05, χ 2 = 3.841, d.f. = 1). 0.05

Species	Boa Vista			Pinheiros			Santo Antônio			Chato			Gavião
%/Adult-juvenile ratio	♀	♂	J	♀	♂ J	J	♀	♂	J	♀	♂	J	♀	♂	J
Poecilia reticulata	87	24	442	103	104 531	531	514	192	2,258	601	401	3,427	590	317	1,270
% (♀+♂/J)	20.07		79.93	33.05 71.95			23.82		76.18	22.62 77.38			41.66		58.34
Chi-square (♀+♂/J)	198.12*				142.24*			812.66*		1.327.76*				60.52*
Poecilia sphenops		-			-		168	91	341	242	143	175		-
% (♀+♂/J)		-			-		43.17		58.83	68.75 31.25				-
Chi-square (♀+♂/J)		-			-			11.2*			78.75*			-
Poecilia velifera		-			-		97	53	243		-			-
% (♀+♂/J)		-			-		38.17		61.83		-			-
Chi-square (♀+♂/J)		-			-			22.00*			-			-
Xiphophorus hellerii	140	56	203	145	43 225	225	208	108	401	363	195	697	536	76	530
% (♀+♂/J)	32.55		33.72	45.52 54.48			44.07		55.93	44.46		55.54	53.59		46.41
Chi-square (♀+♂/J)		0.12			3.32			10.08*			15.4*			5.88*
Xiphophorus maculatus	80	77	151	161	84 138	138	128	132	110	261	156	120	355	207	133
% (♀+♂/J)	50.97		49.03	63.97 36.03			70.27 29.73			77.65		22.35	80.86		19.14
Chi-square (♀+♂/J)		0.12			29.9*			60.8*			164.26*			264.8*
Xiphophorus variatus		-		119	103 351	351	278	75	269	284	104	494	538	265	1,002
% (♀+♂/J)		-		38.74 61.26		61.26	56.75		43.25	43.99		56.01	44.49		55.51
Chi-square (♀+♂/J)		-			23.94*			11.34*			12.74*			21.94*