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

d. Particular Population:
1. Area of the population- Biologists for Ebasco Services
Inc. live-trapped a single Z. h. preblei near Woman
Creek, part of the U.S. Department of Energy, Rocky
Flats Plant, Golden, Colorado on May 24, 1991 (Ebasco
Services Inc. pers. comm.). The habitat consisted of a
smoothe brome (Bromus inermis) reclaimed grassland
site adjacent to a Woman Creek riparian area.
2. Number, and age (or size) classes of individuals- The
individual was an adult male, weighing 17.0 grams, and
having a body length of 79 turn, tail length of 102 mm,
hind foot length of 27 mm, and ear length of 7 mm.
3. Density (number of individuals per unit area)- No
population estimate was given.
4. Presence- No live-trapping was conducted in 1992.
5. Evidence of reproduction- There was no evidence of
juveniles or pregnant or lactating females at Rocky Flats
in 1991.
6. Evidence of expansion/contraction- There is no long-
term capture data available to make this determination.
e. Particular Population:
1. Area of the population- A single Z. h. preblei was
captured at the VanVleet parcel (Section 10, T IS, R
70W), City of Boulder Open Space Department, just
south of Highway 36, on August 14, 1992 by Stephen A.
Compton, Pioneer Environmental Consulting Services,
Inc. The habitat consisted of moist, lowland topography,
with a vegetation of dense, tall grasses with some forbs.
2. Number, and age (or size) classes of individuals- The
• individual was an adult female, weighed 25.5 grams, and
had a body length of 85 mm and a tail length of 134
mm.
3. Density (number of individuals per unit area)- No
population estimate was possible based on the single
capture.
4. Presence- Over 300 trap-nights at the VanVleet parcel,
there was only a single capture of Z. h. preblei. This
capture represents the presence of the subspecies at the
VanVlcet parcel, but the status of any population in the
area is unknown.
5. Evidence of reproduction-The adult female showed no
evidence of pregnancy or lactation.
6. Evidence of expansion/contraction- The capture
represents the first capture in this location, and therefore
there is not enough long-term capture data to make this
determination.
3. Other demographic information- In addition to live-trapping surveys
conducted at Fort St. Vrain Generating Station, and the Tracy Collins and
VanVleet parcels, Pioneer Environmental Consulting Services, Inc.
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