Table 1.

Results of statistical pairwise comparisons (test values χ ² and p-values) of rainbow trout ( Oncorhynchus mykiss ) populations after exposure to Flavobacterium columnare (see Figure 2 for survival data)

	Ancestor		Starved Rhizoid		Starved rough
	χ 2	p-value	χ 2	p-value	χ 2	p-value
Ancestor
Starved Rhizoid	33,886	< 0.001
Starved Rough	92,627	< 0.001	120,889	< 0.001
Control	227,251	< 0.001	219,356	< 0.001	46,401	< 0.001

Fish were exposed to the ancestral virulent rhizoid isolate and rhizoid and rough isolates isolated after starvation in lake water for 149 days (5 months). Control populations were exposed to sterile culture medium. Kaplan Meier survival analysis for whole data χ² = 33.89, p < 0.001.