Environmental Engineering Reference
In-Depth Information
Table 4.1
Summary of islands from which six species of vertebrate pests have
been eradicated, before and after 2001. Rodent data from Howald
et al
.
(2007);
goat (
Capra hircus
) data from Campbell and Donlan (2005); cat (
Felis catus
) data
from Nogales
et al
. (2004).
Taxa
Before 2001
After 2001
No. islands
Mean
area
(ha)
Largest
island
(ha)
No. islands Mean
area
(ha)
Largest
island
(ha)
Rattus norvegicus
51
173
3103
22
695
11300
Rattus rattus
82
60
800
37
63
1022
Rattus exulans
44
158
1965
3
2011
3083
Mus musculus
22
96
710
4
119
200
Capra hircus
102
1421
36100
5
18288
58465
Felis catus
45
1318
29000
7
2843
9700
Fig. 4.1
Invasive arboreal mammals such as the brushtail possum (
Trichosurus
vulpecula
) and ship rat (
Rattus rattus
) are key predators of New Zealand birds.
This is a primary motivation for attempts to eradicate these invasive species.
Photo: David Mudge, Nga Manu Images.
