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Chapter 5 Rare Invertebrate Management
Page 5-20
weedy plant species are found along the section of ridge where A. mustelina is found, between
3,000 and 3,400 ft. Little effort has been spent looking for evidence of E. rosea and rat
predation, but in the limited time spent no evidence was found. NRS will survey the eastern
boundary ridge along the Dupont trail within this branch of East Makaleha to determine the
presence and abundance of snails there. NRS will expand management of this area by first
developing fencing plans. A. mustelina from ESU-B2 are represented at the U.H. Tree Snail
Laboratory.
5.5.g.4.c.2 Culvert 73
Culvert 73 is off of the Mt. Ka`ala Access Road. The forest is fairly intact wet forest dominated
by Metrosideros polymorpha and Dicranopteris linearis. A. mustelina is found along the crest of
the ridge that starts at culvert 73. This ridge has similar characteristics as the ridge off of culvert
69. Very few weedy plant species are found along the section of ridge where A. mustelina is
found, between 3,000 and 3,400 ft. Little effort has been spent in the area looking for evidence
of E. rosea and rat predation, but in the limited time spent no evidence was found. Again NRS
will place priority on developing fencing plans for this area and continue to survey to determine
extent and abundance of A. mustelina in the area.
5.5.g.4.e ESU C
Table 5-6 Number of Counted in ESU C
Pop Ref Code
No. Snails as of
7/04
SBW-A North
Hale`au`au Hame
Ridge
13
SBW-B North
Hale`au`au one
ridge north of Hame
SBW-C North
Hale`au`au just
above Pouteria pair
territory
SBW-P Stekaa site
ANU-A Manuwai
Gulch
TOTAL
7
10
Lg
13
Size Classes
Med Sml
Pigs/ Goats
Weeds
Rats
Euglandina
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
7
7
3
4
1
2
1
1
31
30
4
1
1
This table shows the number of snails, size classes, and threats to the snails in ESU C. Shaded boxes indicate that the threat is being controlled,
X’s indicate that the threat is present. In some cases the threat may be present but not actively preying on A. mustelina.
Management for ESU C is challenging. The numbers of snails found at any one site within the
ESU are few and the habitat quality is marginal. Access issues related to steep terrain and
Schofield Barracks West Range compound these challenges. ESU-C was not managed prior to
the MIP. Originally, the SBW-A, B and C sites were going to be combined into one site for
management. Unfortunately, this site is difficult to access because of its location above the
Schofield Barracks West Range (SBW) live-fire training area. At the May 2004 MIT snail
subcommittee meeting a decision was made to survey the upper reaches of Manuwai gulch to