Dipodomys merriami
Merriam's Kangaroo Rat (Dipodomys merriami)
| Exposure Endpoint Type | Endpoint Value | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties |
|---|---|---|---|---|---|---|---|---|
| Population Density | 6 | #/ha | Both Male and Female | Adult | Not Reported | Boyde Deep Canyon Reserve (elev., 300m) | Exposure Factor Datasets | Riverside |
| Exposure Endpoint Type | Endpoint Value | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties | Error |
|---|---|---|---|---|---|---|---|---|---|
| Duration of Incubation or Gestation | 4 | wk | Female | Adult | Not Reported | Owens Valley, Big Pine (lat., 37^o11'N) | Exposure Factor Datasets | Inyo | |
| Clutch or Litter Size | 2.46 | pups/itter | Female | Adult | Not Reported | Owens Valley, Big Pine (lat., 37^o11'N) | Exposure Factor Datasets | Inyo | 0.72 SD |
| Time of Torpor or Hibernation | none | Female | Adult | Not Reported | Owens Valley, Big Pine (lat., 37^o11'N) | Exposure Factor Datasets | Inyo | ||
| Time of Mating/ Laying | Jan. - June | Both Male and Female | Adult | Not Reported | Owens Valley, Big Pine (lat., 37^o11'N) | Exposure Factor Datasets | Inyo | ||
| Age at Sexual Maturity | 1 | yr | Male | Adult | Not Reported | Owens Valley, Big Pine (lat., 37^o11'N) | Exposure Factor Datasets | Inyo |
| Exposure Endpoint Type | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type |
|---|---|---|---|---|---|---|---|
| Body Weight - Mean | range of seasonal body weights | g | Female | Adult | 482 | Santa Rita Experimental Range, Tucson (elev., 3000 - 4500 ft) | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties | Error |
|---|---|---|---|---|---|---|---|---|---|---|
| Foraging Distance | minimum distances moved by individuals on one trap night | m | Both Male and Female | Not Reported | 5 males, 6 females | Owens Valley (1,220 m) | Exposure Factor Datasets | Inyo | ||
| Body Weight - Mean | 36 | g | Male | Not Reported | NR (74 males and females total) | Owens Valley | Exposure Factor Datasets | Inyo | 0.22 SE | |
| Body Weight - Mean | 33 | g | Female | Not Reported | NR (74 males and females total) | Owens Valley | Exposure Factor Datasets | Inyo | 0.32 SE |
| Exposure Endpoint Type | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Lab |
|---|---|---|---|---|---|---|---|---|
| Body Weight - Mean | range of means of initial weights for 3 experimental groups | g | Not Reported | Not Reported | 9/group | captured at Joshua Tree, San Bernadino County, CA | Exposure Factor Datasets | Laboratory |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type |
|---|---|---|---|---|---|---|---|---|
| Longevity | 2 | yrs | Not Reported | Adult | Not Reported | Portal | Exposure Factor Datasets | |
| Home Range | 46.5 | median lifetime distance moved from home range center (from first to last capture) | m | Male | Adult | 36 | Portal | Exposure Factor Datasets |
| Home Range | 25.0 | median lifetime distance moved from home range center (from first to last capture) | m | Female | Adult | 25 | Portal | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Lab |
|---|---|---|---|---|---|---|---|---|
| Body Weight - Mean | g | Not Reported | Not Reported | Not Reported | captured in San Bernadino and Riverside Counties, CA | Exposure Factor Datasets | Laboratory | |
| Metabolic Rate | range of mean "minimal metabolism" estimated as oxygen consumption at 32C | ml O2/g/h | Not Reported | Not Reported | 8 | captured in San Bernadino and Riverside Counties, CA | Exposure Factor Datasets | Laboratory |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties | Error |
|---|---|---|---|---|---|---|---|---|---|---|
| Dietary Composition | seed (77%); vegetation (18%); arthropod (4.5%); feces (0.5%) | % of total dry matter of stomach contents | % | Not Reported | Not Reported | 4-9 per mo/15 mo | Kelso Sand Dunes (elev., 830-840 m) [lat., 34^o53'30"N, long., 115^o40'20"W] | Exposure Factor Datasets | San Bernardino | |
| Body Weight - Mean | 33.9 | g | Not Reported | Not Reported | 4-9 per mo/15 mo | Kelso Sand Dunes (elev., 830-840 m) [lat., 34^o53'30"N, long., 115^o40'20"W] | Exposure Factor Datasets | San Bernardino | 2.2 SD |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type |
|---|---|---|---|---|---|---|---|---|
| Clutches or Litters per year | litters/yr | Female | Adult | Not Reported | Las Vegas Valley, Clark County (elev., 2500 ft) | Exposure Factor Datasets | ||
| Body Weight - Mean | see citation | figure of seasonal changes in mean body weight | g | Both Male and Female | Adult | 2-96/mo | Las Vegas Valley, Clark County (elev., 2500 ft) | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type |
|---|---|---|---|---|---|---|---|
| Metabolic Rate | range of mean monthly carbon dioxide production rates in the field | ml CO2/g/hr | Not Reported | Adult | 1 - 5/mo | Rock Valley | Exposure Factor Datasets |
| Metabolic Rate | range of monthly estimated energy expenditures in the field | kcal/g/d | Not Reported | Adult | 1 - 5/mo | Rock Valley | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Condition | Error |
|---|---|---|---|---|---|---|---|---|---|
| Population Density | 7.8 | #/ha | Both Male and Female | Not Reported | 782 | Cave Creek Bajada, Cochise County (elev., 1330 m) | Exposure Factor Datasets | ||
| Body Weight - Mean | 44.0 | g | Male | Adult | 443 | Cave Creek Bajada, Cochise County (elev., 1330 m) | Exposure Factor Datasets | 0.3 | |
| Body Weight - Mean | 41.1 | g | Female | Adult | Not Reported | Cave Creek Bajada, Cochise County (elev., 1330 m) | Exposure Factor Datasets | non-breeding | 0.1 |
| Exposure Endpoint Type | Endpoint Value | Units | Sex | Life Cycle Stage | Sample Size | Location | Type |
|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | 2.02 | embryos/female | Female | Adult | Not Reported | Santa Rita Experimental Range, Tucson (elev., 3000-4000 ft) | Exposure Factor Datasets |
| Home Range | 0.466 | acres | Male | Adult | Not Reported | Santa Rita Experimental Range, Tucson (elev., 3000-4000 ft) | Exposure Factor Datasets |
| Home Range | 0.373 | acres | Female | Adult | Not Reported | Santa Rita Experimental Range, Tucson (elev., 3000-4000 ft) | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties |
|---|---|---|---|---|---|---|---|---|
| Population Density | 16.2 | #/ha | Not Reported | Not Reported | Not Reported | Indian Cove, Joshua Tree National Monument | Exposure Factor Datasets | San Bernardino |
| Clutch or Litter Size | 2.2 | embryos/ female | Female | Adult | 24 | Indian Cove, Joshua Tree National Monument | Exposure Factor Datasets | San Bernardino |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Age-Specific | Lab |
|---|---|---|---|---|---|---|---|---|---|---|
| Body Weight - Mean | see citation | figure of changes in weight over time | g | Not Reported | Juvenile | 4 litters | adults captured at Alpine Butte, Los Angeles County, CA | Exposure Factor Datasets | 0 - 140 d | Laboratory |
| Growth Rate | see citation | figure of changes in weight over time | g | Not Reported | Juvenile | 4 litters | adults captured at Alpine Butte, Los Angeles County, CA | Exposure Factor Datasets | 0 - 140 d | Laboratory |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Age-Specific | Lab |
|---|---|---|---|---|---|---|---|---|---|---|
| Age at Fledging, Metamorphosis, Weaning | d | Both Male and Female | Juvenile | 34 | captured at Indian Cove, Joshua Tree National Monument | Exposure Factor Datasets | Laboratory | |||
| Body Weight - Mean | see citation | figure of body weight at ages 0 - 162 d | g | Both Male and Female | Both Adults and Juveniles | 34 | captured at Indian Cove, Joshua Tree National Monument | Exposure Factor Datasets | 0 - 162 d | Laboratory |
Merriam's Kangaroo Rat (Dipodomys merriami), Little Pocket Mouse (Perognathus longimembris)
| Exposure Endpoint Type | Endpoint Value | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties |
|---|---|---|---|---|---|---|---|
| Time of Molt | July and August | Not Reported | Not Reported | Not Reported | Owens Valley | Exposure Factor Datasets | Inyo |
| Time of Molt | July and August | Not Reported | Not Reported | Not Reported | Owens Valley | Exposure Factor Datasets | Inyo |
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