Table 2.

Multivariate model of exotic bird species establishment success on oceanic islands.

	level	estimate	s.e.	t-value
intercept		5.29	2.05
no. of introduced predatory mammals		−4.00	1.90	−2.10*
introduction effort (no. of individuals)	0–10	−3.09	0.59	−5.21***
	11–100	−1.67	0.46	−3.62**
	>101	0

The sample size was only 30, as not all data were available for all archipelagos. *p<0.05, **p<0.01, ***p<0.001.