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| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|
| Dietary Composition | Erodium cicutarium leaf (19.4%) and seed (18.8%); Schismus barbatus non-seed (15.3%) and seed (2.8%); unidentified grass (14.1%); Bromus madritensis (7.1%); insect (8.1%); Hirschfeldia incana seed (4.7%); Eriogonom fasciculatum seed (3.5%); Salsola tragus seed (3.4%); Amsinckia menziesii seed (2.4%); Artemesia californica seed (0.9%) | annual % frequency of occurrence in fecal pellets | % | Not Reported | Not Reported | Mottee Rimrock Reserve and San Jacinto Wildlife Area | 5-10 pellets/mo | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Range | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|---|
| Growth Rate | 19.00 (20-29g); 8.82 (30-39g); 8.80 (40-49g); 0.94 (60-69g) | mass specific growth rates pooled by sex and site expressed as change in body mass per mo for 4 weight classes (20-69g) | g/mo | Both Male and Female | Not Reported | Motte Rimrock Reserve and San Jacinto Wildlife Area | 1-125/site and sex | Exposure Factor Datasets | |
| Age at Sexual Maturity | 3 | mo | Female | Adult | Motte Rimrock Reserve and San Jacinto Wildlife Area | Not Reported | Exposure Factor Datasets | ||
| Population Density | see citation | figure of monthly population densities at two sites | #/ha | Both Male and Female | Not Reported | Motte Rimrock Reserve and San Jacinto Wildlife Area | Not Reported | Exposure Factor Datasets | |
| Clutches or Litters per year | range over 2 yrs | 1.50 - 1.93 | litters/yr | Female | Adult | Motte Rimrock Reserve and San Jacinto Wildlife Area | 8-14/yr | Exposure Factor Datasets | |
| Clutch or Litter Size | 2.67 | young/litter | Female | Adult | Motte Rimrock Reserve and San Jacinto Wildlife Area | 6 | Exposure Factor Datasets | ||
| Longevity | 19 | maximum time of persistence at site | mo | Both Male and Female | Adult | Motte Rimrock Reserve and San Jacinto Wildlife Area | Not Reported | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Description | Range | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|
| Population Density | range of densities estimated over 2 yrs | 4.9 - 5.2 | #/ha | Not Reported | Not Reported | San Jacinto Wildlife Refuge | 320 - 640 trap nights | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Range | Units | Sex | Life Cycle Stage | Sample Size | Type |
|---|---|---|---|---|---|---|---|
| Body Weight - Mean | 62.2 | 45 - 73 | g | Not Reported | Not Reported | 40 | Exposure Factor Datasets |
| Exposure Endpoint Type | Range | Units | Sex | Life Cycle Stage | Sample Size | Type |
|---|---|---|---|---|---|---|
| Population Density | < 1 - >10 | #/ha | Not Reported | Not Reported | Not Reported | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Description | Range | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|
| Longevity | lifespan in captivity | 4 - 7 | yrs | Both Male and Female | Adult | captured in San Diego County | 2 | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|
| Dietary Composition | Grasses: Oryzopsis hymenoides (27.7%); Hilaria rigida (6.6%); Bromus rubens (8.5%); Annual forbs: Plantago insularis (12.3%); Phacelia spp. (4.5%); Perrenial shrubs: Ephedra funera (9.8%); Sphaeralcea ambigua (11.3%); Dalea fremontii (7.3%); Vegetative plant parts: Phacelia spp. (3.5%); Misc. (4.5%) | % volume in cheek pouches of major (>2%) food items | Not Reported | Not Reported | Las Vegas Valley, Clark County (elev., 2500 ft) | 27 | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Type |
|---|---|---|---|---|---|---|---|
| Metabolic Rate | OC = 12.68 - 0.286T | equation for average maintenance metabolism estimated as oxygen consumption (OC) at ambient temperatures (T; <30C). | ml O2/g/hr | Not Reported | Not Reported | 27 | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Error | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | 5.78 | 0.22 | embryos/litter | Female | Adult | Floating Island, Tooele County (elev., 1300-1420 m) | 9 | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|
| Longevity | > 8 | lifespan in captivity | yrs | Not Reported | Adult | captured in Kern County, CA | 1 | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Type |
|---|---|---|---|---|---|---|---|
| Longevity | 8.3 | maximum lifespan in captivity | yrs | Both Male and Female | Adult | 216 | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Type |
|---|---|---|---|---|---|---|---|
| Age at Fledging, Metamorphosis, Weaning | 18 | d | Not Reported | Juvenile | 26 | Exposure Factor Datasets | |
| Growth Rate | see citation | figure of body weight at various ages (0 - 60 d) with calculated instantaneous growth rates | g | Not Reported | Juvenile | 26 | Exposure Factor Datasets |
| Body Weight - Mean | 1.3 | weight at birth | g | Not Reported | Neonate | 26 | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|
| Home Range | 19.0 | home range expressed as "sigma" (radius within which the probability of an animal being present is 39%) | m | Both Male and Female | Not Reported | U.S. Atomic Energy Commission, Nevada Test Site | 4 sampling periods | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|
| Dietary Composition | see citation | monthly % volume of food items (detailed species-specific list) in feces | % | Both Male and Female | Not Reported | Irvine Ranch | 3 - 26/mo | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|
| Dietary Composition | Grasses: Oryzopsis hymenoides (18.0%); Hilaria rigida (13.7%); Tridens pulchella (3.3%); Bromus rubens (4.7%); Annual forbs: Plantago insularis (16.6%); Eriogonum spp. (14.3%); Phacelia spp. (6.8%); Vegetative plant parts: Phacelia spp. (6.0%); Erodium circutarium (3.2%); Misc. (8.4%) | % volume in cheek pouches of major (>2%) food items | % | Not Reported | Not Reported | Las Vegas Valley, Clark County (elev., 2500 ft) | 54 | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|
| Home Range | 37.3 | home range expressed as "sigma" (radius within which the probability of an animal being present is 39%) | m | Both Male and Female | Not Reported | U.S. Atomic Energy Commission, Nevada Test Site | 9 sampling periods | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|
| Dietary Composition | see citation | monthly % volume of food items (detailed species-specific list) in feces | % | Both Male and Female | Not Reported | Irvine Ranch | 15-47/mo | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Sex | Life Cycle Stage | Sample Size | Type |
|---|---|---|---|---|---|
| Population Density | review | Not Reported | Not Reported | Not Reported | Exposure Factor Datasets |
| Home Range | review | Not Reported | Not Reported | Not Reported | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Sex | Life Cycle Stage | Sample Size | Type |
|---|---|---|---|---|---|---|
| Time of Mating/ Laying | May - June | breeding | Both Male and Female | Adult | Not Reported | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Error | Units | Sex | Life Cycle Stage | Location | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | 7.2 | live embryo counts | 0.4 SE | pups/litter | Female | Adult | east-central North Dakota; west -central Minnesota | 178 females | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Range | Units | Sex | Life Cycle Stage | Sample Size | Type |
|---|---|---|---|---|---|---|---|---|
| Time of Mating/ Laying | mid-February-mid April | Both Male and Female | Adult | 25-200 animals | Exposure Factor Datasets | |||
| Duration of Incubation or Gestation | 59-77 | days | Both Male and Female | Embryo | 59 females | Exposure Factor Datasets | ||
| Time of Hatching or Parturition | May-early June | Both Male and Female | Neonate | 118 females | Exposure Factor Datasets | |||
| Clutch or Litter Size | 4.28 | 1-10 | pups/litter | Female | Adult | 118 litters | Exposure Factor Datasets | |
| Duration of Incubation or Gestation | 61.5 | second estrus | 59-65 | d | Both Male and Female | Embryo | 4 females | Exposure Factor Datasets |
| Time of Mating/ Laying | second half of May | second estrus | Both Male and Female | Adult | 4 females | Exposure Factor Datasets | ||
| Time of Hatching or Parturition | second half of July | second estrus | Both Male and Female | 4 females | 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 | range of mean litter sizes for two years | 2.5 (0.4SE) - 5.2 (0.8 SE) | pups/litter | Female | Adult | Tofield 15 deg.N,112 deg. W east central Alberta | 15 litters | Exposure Factor Datasets | ||
| Population Density | 0.7-1.2 | animals/km2 | Not Reported | Tofield 15 deg.N,112 deg. W east central Alberta | Not Reported | Exposure Factor Datasets | ||||
| Home Range | 2556 | home range, as indexed by greatest distance between captures | 231SE | 1200-4050 | m | Male | Adult | Tofield 15 deg.N,112 deg. W east central Alberta | 17 | Exposure Factor Datasets |
| Home Range | 1970 | home range, as indexed by greatest distance between captures | 170 SE | 700-4200 | m | Female | Adult | Tofield 15 deg.N,112 deg. W east central Alberta | 30 females | Exposure Factor Datasets |
| Home Range | 3310 | home range, as indexed by greatest distance between captures | 410 SE | 850-10100 | m | Male | Juvenile | Tofield 15 deg.N,112 deg. W east central Alberta | 29 juveniles | Exposure Factor Datasets |
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