Environmental Engineering Reference
In-Depth Information
(a)
(b)
(c)
(d)
Fig. 11.2
Key players and elements in the management programme. (a) YCA
tending the mooncake scale
Tachardina aurantiaca
. (b) The Bell 47 Soloy
helicopter with underslung bait hopper. (c) Presto
®
01 pelletized bait containing
fi pronil as the active ingredient at 0.01%. This bait was dispersed from the
hopper above the rainforest canopy at 4kg per ha. (d) Dedicated fi eld crew
loading Presto
®
01 into the hopper for aerial broadcasting.
behaviour, the YCA appears to break the resource discovery--resource dominance
trade-off (Davidson 1998) to disrupt ant and invertebrate communities on both
islands and continents (e.g. Haines and Haines 1978; Hill
et al
. 2003; Sarty
et al
.
2007; Bos
et al
. 2008). Impacts may extend to vertebrates, including nesting sea-
birds (Feare 1999) and land birds (Davis
et al
. 2008).
Christmas Island (10°30
E) is an elevated, oceanic limestone island,
360km south of Java in the north-eastern Indian Ocean. The 134 km2 island rises
sharply to a central plateau (maximum elevation 361m) in a series of cliffs and
S 105°40
