Clutch or Litter Size
Least Tern (Sterna antillarum)
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type |
|---|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | 2.1-2.7 | range of clutch means over 3 years of study | eggs/clutch | Female | Adult | 6-18 clutches/study year | Yellowstone River | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Units | Life Cycle Stage | Location | Type | Age-Specific | California Counties |
|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | 2 | # | Adult | Exposure Factor Datasets | 2.4 | Butte |
| Exposure Endpoint Type | Endpoint Value | Sample Size | Location | Type |
|---|---|---|---|---|
| Clutch or Litter Size | review | Not Reported | Exposure Factor Datasets |
American Kestrel (Falco sparverius)
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Condition | Lab |
|---|---|---|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | 3.66 | mean clutch size in captivity | eggs | Female | Adult | 5 | Exposure Factor Datasets | Breeding | Laboratory |
Burrowing Owl (Athene cunicularia formerly Speotyto cunicularia)
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties |
|---|---|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | 2.5 | mean number of chicks per nest | chicks/nest | Both Male and Female | Adult | 11 pairs | Moffett Air Force Base | Exposure Factor Datasets | Santa Clara |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Error |
|---|---|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | 8.8 | mean clutch size in artificial burrows | eggs/clutch | Female | Adult | 8 clutches, 66 eggs | New Mexico State University | Exposure Factor Datasets | 1.8 SE |
Desert Tortoise (Gopherus agassizi)
| Exposure Endpoint Type | Units | Sex | Life Cycle Stage | Sample Size | Location | Type |
|---|---|---|---|---|---|---|
| Clutch or Litter Size | eggs/clutch | Female | Not Reported | Not Reported | Beaver Dam Slope, Washington County (elev., 3200-3500 ft) | Exposure Factor Datasets |
Western Fence Lizard (Sceloporus occidentalis)
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties |
|---|---|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | CS = 0.261(SVL) - 10 | regression equation relating clutch size(CS) to female snout-vent length (SVL; mm) | eggs/clutch | Female | Adult | 27 | Hastings Reservation | Exposure Factor Datasets | Monterey |
Desert Sideblotched Lizard (Uta stansburiana ssp. stejnegeri)
| Exposure Endpoint Type | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type |
|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | range of clutch size means for two time periods | eggs/clutch | Female | Adult | 71-95 | Crane county | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Units | Sex | Life Cycle Stage | Sample Size | Location | Type |
|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | 4 | eggs/female | Female | Adult | Not Reported | Palo Duro Canyon, Armstrong County (elev., 2000-3600 ft); Kermit , Winkler County and Monahans, Ward County (elev., 2800 ft) | Exposure Factor Datasets |
Blunt-nosed Leopard Lizard (Gambelia sila formerly Gambelia silus)
| Exposure Endpoint Type | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties |
|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | eggs/clutch | Female | Adult | 11 | Elkhorn Plain | Exposure Factor Datasets | San Luis Obispo |
California Ground Squirrel (Spermophilus beecheyi)
| Exposure Endpoint Type | Endpoint Value | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties | Condition | Error |
|---|---|---|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | 6.7 | young/litter | Female | Adult | 26 | University of California, Santa Cruz Campus ( elev., 120 m) [lat., 37^0W; long., 122^oW] | Exposure Factor Datasets | Santa Cruz | primiparous | 0.3 SE |
Eastern Long-toed Salamander (Ambystoma macrodactylum ssp. columbianum)
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Error |
|---|---|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | 105.3 | eggs/cluster averaged 14.8 | eggs/female | Female | Adult | 16 | Bear Wallow, Baker County (elev., 1140m) | Exposure Factor Datasets | 31.03 SD |
California Vole (Microtus californicus)
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties | Error |
|---|---|---|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | 6.0 | mean; height of growing season | pups/litter | Female | Adult | 4 | Russell Reservation | Exposure Factor Datasets | Contra Costa | 1.3 (95%CI) |
| Exposure Endpoint Type | Endpoint Value | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties |
|---|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | 4.2 | pups/litter | Female | Adult | 12 | Volta | Exposure Factor Datasets | Merced |
| Exposure Endpoint Type | Endpoint Value | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Error | Lab |
|---|---|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | 3.3 | young/litter | Female | Adult | 12 | Exposure Factor Datasets | 0.4 SE | Laboratory |
Long-tailed Weasel (Mustela frenata)
| Exposure Endpoint Type | Endpoint Value | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Lab |
|---|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | 4 | young/litter | Female | Adult | 1 | captured at Tahoe City, California | Exposure Factor Datasets | Laboratory |
Merriam's Kangaroo Rat (Dipodomys merriami)
| Exposure Endpoint Type | Endpoint Value | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties | Error |
|---|---|---|---|---|---|---|---|---|---|
| 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 |
Bell's Vireo (Vireo bellii)
| Exposure Endpoint Type | Endpoint Value | Sex | Life Cycle Stage | Sample Size | Location | Type | Countries |
|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | review | Not Reported | Not Reported | Not Reported | Exposure Factor Datasets | MEXICO, USA |
Stephens' Kangaroo Rat (Dipodomys stephensi)
| Exposure Endpoint Type | Endpoint Value | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties |
|---|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | 2.67 | young/litter | Female | Adult | 6 | Motte Rimrock Reserve and San Jacinto Wildlife Area | Exposure Factor Datasets | Riverside |
Deer Mouse (Peromyscus maniculatus ssp. borealis)
| Exposure Endpoint Type | Endpoint Value | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Countries | Error |
|---|---|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | 5.25 | #/litter | Female | Adult | 137 | Kananaskis Valley, Alberta (elev., 1370 - 2700m) | Exposure Factor Datasets | CANADA | 0.07 SE |
Peregrine Falcon (Falco peregrinus)
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Condition |
|---|---|---|---|---|---|---|---|---|---|
| Clutch or Litter Size | 3.09 | average number of eggs or downy chicks per pair | eggs or downy chicks/nest | Both Male and Female | Adult | 11 pairs | Yukon River | Exposure Factor Datasets | breeding |
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