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Volume 3, Number 3—September 1997

Dispatch

Population Dynamics of the Deer Mouse (Peromyscus maniculatus) and Sin Nombre Virus, California Channel Islands

Tim B. Graham* and Bruno B. Chomel
Author affiliations: *USGS, Biological Resources Division, Moab, Utah, USA; †University of California, Davis, California, USA

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Table

Numbers of Peromyscus maniculatus captured and tested on San Miguel (SMI), Santa Rosa (SRI), and Santa Cruz (SCI) Islands in 1995 and 1996, and results of serologic assay on blood collected from captured mice

Island (Site) Dates Total captures (no.) Mice (no.) Density no. ha-1 (SE) Tested for SNV (no.) SNV- positive (%) Female: Male Female: Male SNV- positive
SMI (Helipad) 3-5 Sep 95 152 118 104.3 (9.6) 116 15.5 59:57 6:12
SMI (Helipad) 5-17 Feb 96 67 49 43.3 (6.19) 49 14.3 25:24 3:4
SMI (Airstrip) 3-5 Sep 95 353 247 218a (NA) 34 5.9 17:17 1:1
SMI (Airstrip) 15-17 Feb 96 90 70 61.9 (7.4) 70 30 37:33 10:11
SRI (Airstrip) 7-9 Sep 95 2 1 NA 1 100 0:1 0:1
SRI (Torrey) 7-9 Sep 95 0 0 NA 0 NA 0:0 0:0
SRI (Campgr) 27-29 Mar 96 43 22 19.5 (4.15) 22 13.6 9:13 0:3
SRI (Cherry) 27-29 Mar 96 27 15 13.3 (3.42) 15 13.3 5:10 0:2
SCI (East Val) 23-25 Mar 96 10 6 5.3 (2.01) 6 0.0 2:4 0:0
SCI (Ranch) 23-25 Mar 96 5 2 NA 2 0.0 1:1 0:0

a Density was not estimated using DISTANCE, but directly, as the number of mice caught (247) divided by the area covered by the web (1.13 ha).

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