Table 5.

Analysis of differences in physiochemical properties of water in which different groups of Symphysodon occur. Data were taken from Tables 3 and 4 of Bleher et al. [16]. Data are in online supplement 1. The abacaxi and Xingu phenotypes were not included in analyses due to small sample sizes. Because of linear separation of the independent variables (pH and conductivity) in tests involving the Heckel phenotype, it was not possible to include both variables in the same model, and therefore, variables were analyzed separately. Linear separation also occurred in pH due to nonoverlapping pH values for the Heckel and blue phenotypes.

	Heckel Symphysodon discus	Green Symphysodon tarzoo	Blue Symphysodon sp. 1
Green	pH: P = 0.022
Symphysodon tarzoo	Cond: P = 0.158
Blue	pH: P < 0.001	pH: P = 0.514
Symphysodon sp. 1	Cond: P = 0.144	Cond: P = 0.549
		pH : Cond: P = 0.546
		Wald test: P = 0.770
Brown	pH: P = 0.019	pH: P = 0.013	pH: P = 0.005
Symphysodon aequifasciatus	Cond: P = 0.004	Cond: P = 0.059	Cond: P = 0.021
		pH : Cond: P = 0.059	pH:Cond: = 0.020
		Wald test: P = 0.038	Wald test: = 0.019