Table 2 The mean number km−1 ± SE of Black Oystercatchers and Glaucous-winged Gulls detected on beach transects “Pre” (2008; n = 16) and “Post” rat eradication (2013; n = 16 and 2019; n = 16).

From: Indirect effects of invasive rat removal result in recovery of island rocky intertidal community structure

Species

Pre

Post

2008 vs. 2013

Post

2008 vs. 2019

2008

2013

Chi Square

P

2019

Chi Square

P

Black Oystercatcher

0.001 ± 0.001

0.005 ± 0.001

15.7081

 < 0.0001*

0.009 ± 0.002

17.8115

 < 0.0001*

Glaucous-winged Gull

0.023 ± 0.008

0.052 ± 0.01

17.0103

 < 0.0001*

0.067 ± 0.025

6.1029

0.035*

  1. *P is significant with α < 0.05.
Back to article page