Table 2.

(A) Colonization experiments with superior numbers of nonnative Vibrio fischeri ES114 (2:1, 5:1, 10:1) over native V. fischeri ET401 in Euprymna tasmanica. (B) Headstart advantage (12 h) of nonnative V. fischeri ES114 over native V. fischeri ET401. Total inoculum of both strains in artificial seawater is 1 × 10³ CFUs/mL. Squid hatchlings were sacrificed at 48 h for enumeration of V. fischeri. Letters indicate significant differences using fixed-treatment analysis of variance (P < 0.05, α = 0.05).

Treatment (n=20)	Percent Vibrio fischeri ES114 (nonnative)
(A) Nonnative superior numbers in Euprymna tasmanica.
Axenic squid	0
ES114 positive control	100
ET401 positive control	0
1:1 ES114:ET401	5.4^A
2:1 ES114:ET401	15.2^B
5:1 ES114:ET401	65.7^C
10:1 ES114:ET401	98.2^D
(B) Nonnative headstart in E. tasmanica.
Axenic squid	0
ES114 positive control	100
ET401 positive control	0
1:1 ES114:ET401	7.6^A
ET401+12 h ES114	0
ES114+12 h ET401	100^B