Table 2.

Assignation of social behaviors according to t-test (p < 0.05) of fitness values shown in Figure 2, using mean $w_p^n$ - and $w_{np}^n$ -values, or $w_p^k$ - and $w_{np}^k$-values.

		Social behavior
	Strain	MTBE	ETBE
Number of generations	A5	Negative	Negative
	A6	Neutral	Negative
	DD1	Negative	Negative
	DD8	Negative	Negative
	EE6	Neutral	Neutral
	MS2	Neutral	Neutral
	SH7	Neutral	Neutral
Growth rate	A5	Neutral	Neutral
	A6	Neutral	Negative
	DD1	Neutral	Neutral
	DD8	Neutral	Negative
	EE6	Neutral	Neutral
	MS2	Positive	Neutral
	SH7	Neutral	Neutral