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| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|
| Population Density | 2 | Minimum density | #/ha | Both Male and Female | Both Adults and Juveniles | grassland habitat, Santa Barbara Island [lat.,33^o29' N, long., 119^o02' W] | Not Reported | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Error | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|
| Body Weight - Mean | 17.6 | 2.91 SD | g | Both Male and Female | Adult | White Mountain Research Station (elev., 3800 m) | 20 | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Error | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | 5.27 | mean litter size based upon number of visible embryos | 0.13 | #/litter | Female | Adult | Gunnison County and Saquache County, (elev., 8500 - 9300 ft.) | 77 | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Error | Range | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | 4.7 | litter size estimated from counts of uterine scars and embryos | 0.7 SE | 3 - 7 | #/litter | Female | Adult | salt marsh, San Pablo and San Francisco Bays | 6 | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Range | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|---|
| Population Density | range of means for 3 trapping periods | 14.1 - 73.1 | #/acre | Both Male and Female | Both Adults and Juveniles | Lake Tahoe, near Myers (elev., 6225 ft) | 3 trapping periods | Exposure Factor Datasets | |
| Time of Mating/ Laying | Apr. - Dec. | Both Male and Female | Adult | Bass Lake (elev., 4500 ft.) | Not Reported | Exposure Factor Datasets | |||
| Home Range | 0.24 | 0.03 - 1.1 | acres | Male | Adult | Bass Lake (elev., 4500 ft.) | 29 | Exposure Factor Datasets | |
| Home Range | 0.21 | 0.01 - 0.66 | acres | Female | Adult | Bass Lake (elev., 4500 ft.) | 27 | Exposure Factor Datasets | |
| Home Range | 0.13 | 0.01 - 0.24 | acres | Male | Juvenile | Bass Lake (elev., 4500 ft.) | 10 | Exposure Factor Datasets | |
| Home Range | 0.12 | 0.02 - 0.31 | acres | Female | Juvenile | Bass Lake (elev., 4500 ft.) | 12 | Exposure Factor Datasets | |
| Population Density | range of means for 4 trapping periods | 8.0 - 16.8 | #/acre | Both Male and Female | Both Adults and Juveniles | Bass Lake (elev., 4500 ft.) | 4 trapping periods | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Description | Range | Units | Sex | Life Cycle Stage | Sample Size | Type |
|---|---|---|---|---|---|---|---|
| Metabolic Rate | basal metabolic rate measured as oxygen consumption at 26 - 29C; body weight range = 15.2 - 17.1g | 1.55 - 1.65 | cc O2/g/hr | Male | Adult | 2 | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Error | Range | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|---|---|
| Age at Sexual Maturity | based on presence of recent corpora lutea; ages inferred from body weights | 32 -35 | d | Female | Adult | western slope of Sierra Nevada (elev., 3500-5000 ft.) | 1546 | Exposure Factor Datasets | ||
| Age at Sexual Maturity | based on presence of swollen tubules of cauda epididymides and enlarged seminal vesicles, ages inferred from body weights | 40 - 60 | d | Male | Adult | western slope of Sierra Nevada (elev., 3500-5000 ft.) | 1546 | Exposure Factor Datasets | ||
| Clutch or Litter Size | 4.6 | based on # of implanted embryos; monthly means (Mar. - Nov.) ranged from 4.0 - 5.7 | 0.11 SE | #/litter | Female | Adult | western slope of Sierra Nevada (elev., 3500-5000 ft.) | 96 | Exposure Factor Datasets | |
| Time of Mating/ Laying | Feb. - Mar. (begin), Mar. - May (peak), July - Aug. (possible 2nd peak), Aug. - Dec. (end) | based on % fecund specimens | Both Male and Female | Adult | western slope of Sierra Nevada (elev., 3500-5000 ft.) | 1546 | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|
| Dietary Composition | seeds (34-53%); fruits (0-22%); arthropods (26-36%); leaves (7-12%); fungi (0-7%); misc. (3-10%) | volumetric % of stomach contents, range of means for 2 yrs. and 2 habitat types | % | Not Reported | Not Reported | western slope of Sierra Nevada (elev., 3500 - 5000 ft.) | 778 | Exposure Factor Datasets |
| Dietary Composition | seeds (0-81%); fruits (2-19%); arthropods (9-57%); leaves (1-18%); fungi (0-26%); misc. (0-42%) | volumetric % of stomach contents, range of monthly means for 2 yrs. and 2 habitat types | % | Not Reported | Not Reported | western slope of Sierra Nevada (elev., 3500 - 5000 ft.) | 40-88 | Exposure Factor Datasets |
| Dietary Composition | seeds (0-80%); fruit (0-30%); arthropods (0-80%); leaves (7-32%); fungi (0%); misc. (0-19%) | volumetric % of stomach contents, range of monthly means for 2 yrs. and 2 habitat types | % | Not Reported | Not Reported | western slope of Sierra Nevada (elev., 3500 - 5000 ft.) | 53-66 | Exposure Factor Datasets |
| Dietary Composition | seeds (6-49%); fruit (0-24%); arthropods (27-80%); leaves (0-20%); fungi (0-5%); misc. (0-18%) | volumetric % of stomach contents, range of monthly means for 2 yrs. and 2 habitat types | % | Not Reported | Not Reported | western slope of Sierra Nevada (elev., 3500 - 5000 ft.) | 48-59 | Exposure Factor Datasets |
| Dietary Composition | seeds (0-68%); fruit (0-24%); arthropods (0-47%); leaves (0-19%); fungi (0-43%); misc. (0-27%) | volumetric % of stomach contents, range of monthly means for 2 yrs. and 2 habitat types | % | Not Reported | Not Reported | western slope of Sierra Nevada (elev., 3500 - 5000 ft.) | 78-105 | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Error | Range | Units | Sex | Life Cycle Stage | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|---|
| Age at Sexual Maturity | 48.72 | based on presence of cornified vaginal epithelial cells | 1.23 | d | Female | Adult | 186 | Exposure Factor Datasets | |
| Age at Sexual Maturity | based on presence of motile sperm | 40 - 60 | d | Male | Adult | 43 - 79 | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Description | Range | Units | Sex | Life Cycle Stage | Sample Size | Type |
|---|---|---|---|---|---|---|---|
| Water Ingestion Rate | range of means from 10 experiments | 0.114 - 0.372 | cc/g/d | Both Male and Female | Not Reported | 4-8 animals/experiment; 10 experiments | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Error | Range | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|---|---|
| Population Density | 11.47 | 7.8 - 15.6 | #/ha | Both Male and Female | Both Adults and Juveniles | San Simon Valley, Portal (elev., 1370 m) | Not Reported | Exposure Factor Datasets | ||
| Home Range | 62.0 | average range of movement after 3 captures | 4.7 | m | Both Male and Female | Adult | San Simon Valley | Not Reported | Exposure Factor Datasets | |
| Metabolic Rate | maintenance energy expenditure estimated from oxygen consumption | 103 - 181 | kcal/day | Both Male and Female | Adult | captured at San Simon Valley, AZ from Aug. - July | 6/sampling period; 10 periods | Exposure Factor Datasets | ||
| Body Weight - Mean | 39.1 - 44.1 | g | Male | Adult | San Simon Valley | Not Reported | Exposure Factor Datasets | |||
| Body Weight - Mean | 38.4 - 44.38 | g | Female | Adult | San Simon Valley | Not Reported | Exposure Factor Datasets | |||
| Growth Rate | see citation | figure of changes in weight over time | Both Male and Female | Juvenile | San Simon Valley, Portal (elev., 1370 m) | 90 | Exposure Factor Datasets | |||
| Dietary Composition | seeds (82%), herbs (14%), shrub (2%), arthropods (2%) | % occurence of food items in cheek pouch contents | % | Not Reported | Not Reported | San Simon Valley, Portal (elev., 1370 m) | 15 | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Range | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | 2.6 | estimated by embryo counts | 1-5 | pups /litter | Female | Adult | Las Vegas Valley, Clark County (elev., 2500 ft) | 163 | Exposure Factor Datasets |
| Age at Sexual Maturity | <2 | age when reproductive activity observed | mo | Both Male and Female | Adult | Las Vegas Valley, Clark County (elev., 2500 ft) | 10 | Exposure Factor Datasets | |
| Dietary Composition | grass seeds (74.2%), annual forb seeds (37.4%), perennial seeds (7.4%), vegetative plant parts (7.4%), insect parts (0.3%), debris (2.7%), unidentified seeds (3%) | % occurrence in cheek pouch contents | % | Not Reported | Not Reported | Las Vegas Valley, Clark County (elev., 2500 ft) | 411 | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Description | Range | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|
| Body Weight - Mean | range of means of initial weights for 3 experimental groups | 38.3 - 40.5 | g | Not Reported | Not Reported | captured at Joshua Tree, San Bernadino County, CA | 9/group | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Error | Range | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|---|---|
| Population Density | 7.8 | 3 - 15 | #/ha | Both Male and Female | Not Reported | Cave Creek Bajada, Cochise County (elev., 1330 m) | 782 | Exposure Factor Datasets | ||
| Body Weight - Mean | 44.0 | 0.3 | g | Male | Adult | Cave Creek Bajada, Cochise County (elev., 1330 m) | 443 | Exposure Factor Datasets | ||
| Body Weight - Mean | 41.1 | 0.1 | g | Female | Adult | Cave Creek Bajada, Cochise County (elev., 1330 m) | Not Reported | Exposure Factor Datasets | ||
| Body Weight - Mean | 49.9 | 0.2 | g | Male | Adult | Cave Creek Bajada, Cochise County (elev., 1330 m) | Not Reported | Exposure Factor Datasets | ||
| Home Range | 44.1 | mean distance moved from site of initial capture | m | Male | Not Reported | Cave Creek Bajada, Cochise County (elev., 1330 m) | 443 | Exposure Factor Datasets |
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