1997-06-13_REPORT - M1981302 ‎(18)‎

• Permit No: M1981302
• IBM Index Class Name: Report
• Doc Date: 6/13/1997
• Doc Name: EXHIBIT A STATUS REPORT ON ZAPUS HUDSONIUS PREBLEI A CANDIDATE ENDANGERED SUBSPECIES
• Media Type: D
• Archive: No

b. Particular Population:
1. Area of the population-Gwilym S. Jones and Diana B.
Jones observed several, and snap-trapped four Z.
hudsonius on June 21, 1972 near Woodburn, El Paso
County, Colorado (Jones and Jones 1985). Even though
the captures were well south of any other known capture
of this subspecies, it is most likely that the individuals
were Z. h. preblei.
2. Number, and age (or size) classes of individuals- No
information was provided in the above-referenced article,
with the exception that four individuals were captured
and several individuals were observed simultaneously.
3. Density (number of individuals per unit area)- No
population estimate was provided in the above-referenced
article.
4. Presence- No recent live-trapping effort was conducted
in this area.
5. Evidence of reproduction- No information was
provided in the above-referenced article.
6. Evidence of expansion/contraction- No time-series
capture or observational data is available.
C. Particular Population:
1. Area of the population- Kristina Williams and Roy E.
Dawson, working as seasonal park rangers for the City of
Boulder Open Space Department, Live-trapped three Z.
hudsonius at the Tracy Collins parcel in May, 1989
(Dawson 1989). Specifically, the individuals were
captured at the base of a small basin, adjacent to Coal
Creek, between Colorado State Highways 93 and 128, 3
• miles south of Boulder, Colorado (central portion of
Section 33, T 1S, R 70W). Given the location of the
captures, it is assumed that the individuals were Z. h.
preblei.
2. Number,and age(or size) classes of individuals-Three
male Z. hudsonius, two adult and one with no age
specified, were captured, one each on May 23, 25 and
31, 1989, weighing 17, 21 and 22 grams, respectively.
3. Density (number of individuals per unit area)- There
was no population estimate.
4. Presence- Live-trapping was conducted at the Tracy
Collins parcel, Coal Creek location from August 12-15,
1992 by Pioneer Environmental Consulting Services, Inc.
Over 300 trap-nights, no Z. hudsonius were captured.
5. Evidence of reproduction- There was no evidence of
juveniles or pregnant or lactating females at Coal Creek
in 1989, an no captures in 1992.
6. Evidence ofexpansion/con traction-There isnotenough
long-term capture data to make this determination.
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