California Vole (Microtus californicus)
California Vole (Microtus californicus)
Exposure Endpoint Type | Endpoint Value | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Age-Specific | Countries |
---|---|---|---|---|---|---|---|---|---|
Population Density | 1 | Animal number | M | Adult | 1 | Sierra San Pedro M´artir, Baja California, Mexico |
Exposure Factor Datasets | Subadult | MEXICO |
Exposure Endpoint Type | Endpoint Value | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties | Condition | Countries | Error |
---|---|---|---|---|---|---|---|---|---|---|---|
Body Weight - Mean | 39.1 | g | F | Not Reported | 21 | Davis, California | Exposure Factor Datasets | Yolo | USA | 2.5 | |
Body Weight - Mean | 39.4 | g | F | Not Reported | 25 | Davis, California | Exposure Factor Datasets | Yolo | USA | 3.6 | |
Body Weight - Mean | 46.1 | g | M | Not Reported | 14 | Castroville, California | Exposure Factor Datasets | Monterey | Previously exposed to anticoagulant rodenticides | USA | 3 |
Body Weight - Mean | 35.2 | g | F | Not Reported | 11 | Castroville, California | Exposure Factor Datasets | Monterey | Previously exposed to anticoagulant rodenticides | USA | 4.6 |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties | Condition |
---|---|---|---|---|---|---|---|---|---|---|
Home Range | 103 | estimated by minimum area polygon | m2 | Male | Adult | Not Reported | Richmond Field Station | Exposure Factor Datasets | Contra Costa | breeding |
Home Range | 68 | estimated by minimum area polygon | m2 | Female | Adult | Not Reported | Richmond Field Station | Exposure Factor Datasets | Contra Costa | breeding |
Population Density | #/ha | Both Male and Female | Both Adults and Juveniles | Not Reported | Richmond Field Station | Exposure Factor Datasets | Contra Costa | breeding |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Sex | Life Cycle Stage | Sample Size | Location | Type | Condition |
---|---|---|---|---|---|---|---|---|
Survival/ Mortality | .739 | minimum survival rate per 2 wks | Female | Adult | 7 breeding seasons (6 populations pooled) | Berkeley | Exposure Factor Datasets | breeding season |
Survival/ Mortality | .766 | minimum survival rate per 2 wks | Female | Adult | 7 breeding seasons (6 populations pooled) | Berkeley | Exposure Factor Datasets | breeding season |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Age-Specific | California Counties | Error |
---|---|---|---|---|---|---|---|---|---|---|---|
Dietary Composition | grass heads (72.6%); grass leaves (4.2%); grass stems (2.0%); grass roots (0.4%); Forb leaves (15.4%); Forb stems (2.6%); Forb roots (2.0%); vole hair (0.8%) | composition of stomach contents | % | Not Reported | Not Reported | 500 items/10 voles | Richmond Field Station | Exposure Factor Datasets | Contra Costa | ||
Population Density | peak density | #/acre | Both Male and Female | Both Adults and Juveniles | Not Reported | Richmond Field Station and Russel Reservation | Exposure Factor Datasets | Contra Costa | |||
Body Weight - Mean | <25 | g | Both Male and Female | Juvenile | Richmond Field Station and Russel Reservation | Exposure Factor Datasets | Contra Costa | ||||
Body Weight - Mean | >40 | g | Male | Adult | Richmond Field Station and Russel Reservation | Exposure Factor Datasets | Contra Costa | ||||
Clutch or Litter Size | 3.4 | mean; early growing season | pups/litter | Female | Adult | 9 | Richmond Field Station | Exposure Factor Datasets | Contra Costa | 0.9 (95%CI) | |
Body Weight - Mean | >35 | g | Female | Adult | Richmond Field Station and Russel Reservation | Exposure Factor Datasets | Contra Costa | ||||
Clutch or Litter Size | 5.2 | mean; height of growing season | pups/litter | Female | Adult | 13 | Richmond Field Station | Exposure Factor Datasets | Contra Costa | 0.8 (95%CI) | |
Body Weight - Mean | g | Male | Both Adults and Juveniles | Richmond Field Station and Russel Reservation | Exposure Factor Datasets | subadult | Contra Costa | ||||
Clutch or Litter Size | 3.6 | mean; dry season | pups/litter | Female | Adult | 5 | Richmond Field Station | Exposure Factor Datasets | Contra Costa | 0.7 (95%CI) | |
Body Weight - Mean | g | Female | Both Adults and Juveniles | Richmond Field Station and Russel Reservation | Exposure Factor Datasets | subadult | Contra Costa | ||||
Clutch or Litter Size | 3.0 | mean; early growing season | pups/litter | Female | Adult | 11 | Russell Reservation | Exposure Factor Datasets | Contra Costa | 0.8 (95%CI) | |
Survival/ Mortality | see citation | figure of seasonal changes in minimum survival rate | %/28d | Both Male and Female | Both Adults and Juveniles | Richmond Field Station and Russel Reservation | Exposure Factor Datasets | Contra Costa | |||
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) | |
Body Fat (total or %) | see citation | figure of seasonal changes in body fat content | g/g dry lean wt | Both Male and Female | Both Adults and Juveniles | Richmond Field Station and Russel Reservation | Exposure Factor Datasets | Contra Costa | |||
Clutch or Litter Size | 3.3 | mean; dry season | pups/litter | Female | Adult | 6 | Russell Reservation | Exposure Factor Datasets | Contra Costa | 1.1 (95%CI) | |
Time of Mating/ Laying | Sept/Oct. - May/June | breeding; > 50% in reproductive condition | Both Male and Female | Adult | Richmond Field Station and Russel Reservation | Exposure Factor Datasets | Contra Costa | ||||
Growth Rate | change in body weight; instantaneous rate based on Brody 1945 | %/d | Both Male and Female | Juvenile | Not Reported | Richmond field station; Russell Reservation | Exposure Factor Datasets | Contra Costa |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties | Error | Lab |
---|---|---|---|---|---|---|---|---|---|---|---|
Body Weight - Mean | 20.4 | median weight at sexual maturity | g | Female | Adult | 69 | Orinda, Layfayette, Russell Reservation | Exposure Factor Datasets | Contra Costa | ||
Body Weight - Mean | 30.4 | median weight at sexual maturity | g | Male | Adult | 56 | Orinda, Layfayette, Russell Reservation | Exposure Factor Datasets | Contra Costa | ||
Clutch or Litter Size | 4.17 | pups/litter | Female | Adult | 220 | captured in Sonoma County, CA | Exposure Factor Datasets | 0.2 SE | Laboratory | ||
Clutch or Litter Size | 4.25 | pups/litter | Female | Adult | 65 | captured in Contra Costa County, CA | Exposure Factor Datasets | 0.28 SE | Laboratory | ||
Clutch or Litter Size | 3.45 | inhabiting perennial grassland enclosure | pups/litter | Female | Adult | 20 | captured in Sonoma County, CA | Exposure Factor Datasets | 0.32 SE | Laboratory | |
Clutch or Litter Size | 5.23 | inhabiting annual grassland enclosure | pups/litter | Female | Adult | 42 | captured in Contra Costa County, CA | Exposure Factor Datasets | 0.33 SE | Laboratory | |
Growth Rate | 2.9 | change in body weight | g/wk | Male | Juvenile | 18 | captured in Sonoma County, CA | Exposure Factor Datasets | 0.3 SE | Laboratory | |
Growth Rate | 3.5 | change in body weight | g/wk | Male | Juvenile | 42 | captured in Contra Costa County, CA | Exposure Factor Datasets | 0.2 SE | Laboratory |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Age-Specific | Error | Lab |
---|---|---|---|---|---|---|---|---|---|---|---|
Clutch or Litter Size | 3.3 | young/litter | Female | Adult | 12 | Exposure Factor Datasets | subadult (4 wks) | 0.7 SE | Laboratory | ||
Clutches or Litters per year | 0.2 | litters per female per 12 wks | litters/12 wks | Female | Adult | 12 | Exposure Factor Datasets | subadult (4 wks) | 0.1 SE | Laboratory | |
Age at Fledging, Metamorphosis, Weaning | 21 | d | Both Male and Female | Juvenile | 24 | Exposure Factor Datasets | Laboratory | ||||
Duration of Incubation or Gestation | 3 | wks | Both Male and Female | Adult | 24 | Exposure Factor Datasets | subadult | Laboratory | |||
Clutches or Litters per year | 0.5 | litters per female per 12 wks | litters/12 wks | Female | Adult | 24 | Exposure Factor Datasets | subadult (4 weeks) | 0.2 SE | Laboratory | |
Clutch or Litter Size | 3.7 | young/litter | Female | Adult | 24 | Exposure Factor Datasets | subadult (4 weeks) | 0.2 SE | Laboratory | ||
Clutch or Litter Size | 3.7 | young/litter | Female | Adult | 12 | Exposure Factor Datasets | 0.3 SE | Laboratory | |||
Clutches or Litters per year | 1.9 | litters per female per 12 wks | litters/12 wks | Female | Adult | 12 | Exposure Factor Datasets | adult | 0.2 SE | Laboratory | |
Clutch or Litter Size | 3.5 | young/litter | Female | Adult | 12 | Exposure Factor Datasets | subadult (4 wks) | 0.6 SE | Laboratory | ||
Body Fat (total or %) | 0.45 | g/g lean dry mass | Both Male and Female | Adult | Not Reported | Exposure Factor Datasets | Laboratory |
Exposure Endpoint Type | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties |
---|---|---|---|---|---|---|---|---|
Home Range | range of average maximum distance between captures for groups recaptured 2-9 times | m | Both Male and Female | Not Reported | Not Reported | San Pablo salt marsh | Exposure Factor Datasets | Contra Costa |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Age-Specific |
---|---|---|---|---|---|---|---|---|---|
Survival/ Mortality | range of mean minimum survival rates per 14 d measured | Female | Juvenile | 2 periods of weekly sampling | Tilden Regional Park | Exposure Factor Datasets | "subadult" (26-39g) | ||
Survival/ Mortality | range of mean minimum survival rates per 14 d measured | Female | Juvenile | 2 periods of weekly sampling | Tilden Regional Park | Exposure Factor Datasets | |||
Body Weight - Mean | range of monthly means at 3 locations | g | Male | Both Adults and Juveniles | 9-169/mo and site | Tilden Regional Park and Richmond Field Station | Exposure Factor Datasets | ||
Population Density | range of minimum # alive in 8 areas at 103 weekly intervals | #/ha | Male | Both Adults and Juveniles | Not Reported | Tilden Regional Park and Richmond Field Station | Exposure Factor Datasets | ||
Population Density | range of minimum # alive in 8 areas at 103 weekly intervals | #/acre | Female | Both Adults and Juveniles | Not Reported | Tilden Regional Park and Richmond Field Station | Exposure Factor Datasets | ||
Time of Mating/ Laying | Oct. - Aug. | based on % scrotal males and performate females; overall range varied by location and year | Both Male and Female | Adult | Not Reported | Tilden Regional Park and Richmond Field Station | Exposure Factor Datasets | ||
Survival/ Mortality | range of mean minimum survival rates per 14 d | Male | Adult | 2 periods of weekly sampling | Tilden Regional Park | Exposure Factor Datasets |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Age-Specific | California Counties | Error |
---|---|---|---|---|---|---|---|---|---|---|---|
Population Density | range in mean density for 2 yr | #/ha | Both Male and Female | Adult | Richmond Field Station | Exposure Factor Datasets | Contra Costa | ||||
Home Range | range in home range (minimum area probability, 0.95) over 2 yrs | m2 | Female | Adult | 7/yr | Richmond Field Station | Exposure Factor Datasets | Contra Costa | |||
Home Range | range in home range (minimum area probability, 0.95) over 2 yrs | m2 | Male | Adult | 4-7/yr | Richmond Field Station | Exposure Factor Datasets | Contra Costa | |||
Home Range | 87.5 | estimated by minimum area probability (0.95) method | m2 | Male | Adult | 2 | Richmond Field Station | Exposure Factor Datasets | subadult | Contra Costa | 1.5 SE |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties |
---|---|---|---|---|---|---|---|---|---|
Population Density | see citation | figure of seasonal changes in density | #/acre | Both Male and Female | Both Adults and Juveniles | Not Reported | Tilden Park | Exposure Factor Datasets | Contra Costa |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Lab |
---|---|---|---|---|---|---|---|---|---|
Metabolic Rate | 0.0251 (10C); 0.0179 (20C); 0.0114 (30C) | mean minium metabolic rate estimated as oxygen consumption at ambient temperatures (10-30C) | ml O2/g/min | Not Reported | Not Reported | 6/group | Exposure Factor Datasets | Laboratory |
Exposure Endpoint Type | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties | Condition |
---|---|---|---|---|---|---|---|---|---|
Body Weight - Mean | range of mean values for 4 grids over 3 yrs | g | Male | Adult | 1 - 20 | Russell Reservation, Berkeley | Exposure Factor Datasets | Contra Costa | breeding |
Body Weight - Mean | range of mean values for 4 grids over 3 yrs | g | Male | Adult | 1 - 23 | Russell Reservation, Berkeley | Exposure Factor Datasets | Contra Costa | non-breeding |
Body Weight - Mean | range of mean values for 4 grids over 3 yrs | g | Female | Adult | 1 - 42 | Russell Reservation, Berkeley | Exposure Factor Datasets | Contra Costa | breeding |
Body Weight - Mean | range of mean values for 4 grids over 3 yrs | g | Female | Adult | 1 - 24 | Russell Reservation, Berkeley | Exposure Factor Datasets | Contra Costa | non-breeding |
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 | Endpoint Description | Units | Sex | Sample Size | Location | Type | Age-Specific | Error | Lab |
---|---|---|---|---|---|---|---|---|---|---|
Food Ingestion Rate | 206 | fed rabbit pellets for 21 d | mg/g/d | Not Reported | 5 | Exposure Factor Datasets | 28 d or older | 6 SE | Laboratory | |
Food Ingestion Rate | 254 | fed bromegrass for 21 d | mg/g/d | Not Reported | 7 | Exposure Factor Datasets | 28 d or older | 8 SE | Laboratory | |
Food Ingestion Rate | 157 | fed ryegrass seeds for 21 d | mg/g/d | Not Reported | 8 | Exposure Factor Datasets | 28 d or older | 5 SE | Laboratory | |
Food Ingestion Rate | 897 | ingested energy; fed rabbit pellets for 21 d | cal/g/d | Not Reported | 5 | Exposure Factor Datasets | 28 d or older | 28 SE | Laboratory | |
Food Ingestion Rate | 1115 | ingested energy; fed bromegrass for 21 d | cal/g/d | Not Reported | 7 | Exposure Factor Datasets | 28 d or older | 35 SE | Laboratory | |
Food Ingestion Rate | 693 | ingested energy; fed ryegrass seeds for 21 d | cal/g/d | Not Reported | 8 | Exposure Factor Datasets | 28 d or older | 22 SE | Laboratory | |
Metabolic Rate | 450 | metabolizable energy; equivalent to average daily metabolic rate | cal/g/d | Not Reported | 5 | Exposure Factor Datasets | 28 d or older | 16 SE | Laboratory | |
Metabolic Rate | 504 | metabolizable energy; equivalent to average daily metabolic rate | cal/g/d | Not Reported | 7 | Exposure Factor Datasets | 28 d or older | 28 SE | Laboratory |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties | Condition | Error |
---|---|---|---|---|---|---|---|---|---|---|---|
Clutch or Litter Size | 4.20 | mean embryo number per female | embryos/female | Female | Adult | 154 | San Francisco Bay, San Rafael | Exposure Factor Datasets | Marin | 1.41 SD | |
Age at Fledging, Metamorphosis, Weaning | 2 | wks | Not Reported | Juvenile | Not Reported | San Francisco Bay, San Rafael | Exposure Factor Datasets | Marin | |||
Longevity | 1 | maximum length of life in wild | yr | Both Male and Female | Adult | Not Reported | San Francisco Bay, San Rafael | Exposure Factor Datasets | Marin | ||
Time of Mating/ Laying | Jan. - June | major breeding season | Both Male and Female | Adult | Not Reported | San Francisco Bay, San Rafael | Exposure Factor Datasets | Marin | |||
Body Weight - Mean | g | Male | Not Reported | Not Reported | San Francisco Bay, San Rafael | Exposure Factor Datasets | Marin | ||||
Body Weight - Mean | g | Female | Not Reported | Not Reported | San Francisco Bay, San Rafael | Exposure Factor Datasets | Marin | non-pregnant |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Error | Lab |
---|---|---|---|---|---|---|---|---|---|---|
Metabolic Rate | 0.53 | mean basal oxygen consumption at 28 degree C | ml O2/g/ hr | Not Reported | Not Reported | 10 | Exposure Factor Datasets | 0.04 | Laboratory | |
Metabolic Rate | OC = 1.94W^-0.209 | equation relating basal oxygen consumption (OC; ml O2/g/hr) to body weight (W, g; 260-800g) | ml O2/g/hr | Not Reported | Not Reported | Not Reported | Exposure Factor Datasets | Laboratory |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type |
---|---|---|---|---|---|---|---|---|
Population Density | see citation | figure of seasonal changes in density | #/acre | Both Male and Female | Not Reported | Not Reported | Tilden Regional Park, Berkeley (elev. 600-1200 ft) | Exposure Factor Datasets |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Lab |
---|---|---|---|---|---|---|---|---|---|
Age at Sexual Maturity | 30 | time when females became perforate and males became scrotal | d | Both Male and Female | Adult | Not Reported | Exposure Factor Datasets | Laboratory | |
Duration of Incubation or Gestation | d | Both Male and Female | Embryo | Not Reported | Exposure Factor Datasets | Laboratory | |||
Growth Rate | see citation | figure of body weight at ages 20 - 180 d | g/d | Both Male and Female | Both Adults and Juveniles | Not Reported | Exposure Factor Datasets | Laboratory |
Exposure Endpoint Type | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Lab |
---|---|---|---|---|---|---|---|---|
Clutch or Litter Size | pups/litter | Female | Adult | 35 females | Exposure Factor Datasets | Laboratory | ||
Body Weight - Mean | range of means measured in voles in enclosures in different seasons | g | Male | Adult | 5-35/sample | Exposure Factor Datasets | Laboratory | |
Body Weight - Mean | range of means measured in voles in enclosures in different seasons | g | Female | Adult | 5-45/sample | Exposure Factor Datasets | Laboratory |
Exposure Endpoint Type | Endpoint Description | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties |
---|---|---|---|---|---|---|---|
Population Density | range of low and high density yrs | Both Male and Female | Not Reported | Not Reported | Richmond Field Station | Exposure Factor Datasets | Contra Costa |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties |
---|---|---|---|---|---|---|---|---|
Clutch or Litter Size | see citation | figure of mean monthly litter sizes | Female | Adult | 4-33/mo | Orinda, Layfayette, Russell Reservation and Sea Ranch | Exposure Factor Datasets | Contra Costa, Sonoma |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties |
---|---|---|---|---|---|---|---|---|---|
Population Density | see citation | figure of seasonal changes in density | #/acre | Both Male and Female | Not Reported | Not Reported | Sea Ranch | Exposure Factor Datasets | Sonoma |
Body Weight - Mean | see citation | figure of seasonal changes in weight | g | Male | Adult | Not Reported | Sea Ranch | Exposure Factor Datasets | Sonoma |
Survival/ Mortality | see citation | figure of proportion surviving/wk | Both Male and Female | Both Adults and Juveniles | Not Reported | Sea Ranch | Exposure Factor Datasets | Sonoma |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Age-Specific | California Counties |
---|---|---|---|---|---|---|---|---|---|---|
Age at Sexual Maturity | 17 | d | Female | Adult | Not Reported | Brooks Island, San Francisco Bay | Exposure Factor Datasets | Contra Costa | ||
Age at Sexual Maturity | 25 | d | Male | Adult | Not Reported | Brooks Island, San Francisco Bay | Exposure Factor Datasets | Contra Costa | ||
Body Weight - Mean | "typical" body weight | g | Male | Adult | Not Reported | Brooks Island, San Francisco Bay | Exposure Factor Datasets | >25 d | Contra Costa | |
Body Fat (total or %) | see citation | figure relating fat content to body weight | g | Both Male and Female | Both Adults and Juveniles | 44 | Brooks Island, San Francisco Bay | Exposure Factor Datasets | Contra Costa | |
Body Weight - Mean | "extra large" body weight (12.6 % of population) | g | Male | Adult | 121 | Brooks Island, San Francisco Bay | Exposure Factor Datasets | >25 d | Contra Costa | |
Body Weight - Mean | "extra large" body weight corrected for embryos (12.8 % of population) | g | Female | Adult | 123 | Brooks Island, San Francisco Bay | Exposure Factor Datasets | >25 d | Contra Costa |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties |
---|---|---|---|---|---|---|---|---|---|
Population Density | see citation | figure of seasonal changes in density | #/acre | Not Reported | Not Reported | Not Reported | Grass Valley Regional Park | Exposure Factor Datasets | Alameda |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties |
---|---|---|---|---|---|---|---|---|---|
Population Density | 550 | peak density | #/ha | Both Male and Female | Both Adults and Juveniles | Not Reported | Russell Reservation | Exposure Factor Datasets | Contra Costa |