Mallard duck (Anas platyrhynchos)
Mallard duck (Anas platyrhynchos)
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type |
---|---|---|---|---|---|---|---|---|
Survival/ Mortality | 47 | average survival rate of birds banded 1948-1982 | % | Male | Juvenile | Not Reported | Sacramento and San Joaquin Valleys, n.e. CA | Exposure Factor Datasets |
Survival/ Mortality | 46 | average survival rate of birds banded 1948-1982 | % | Female | Juvenile | Not Reported | Sacramento and San Joaquin Valleys, n.e. CA | Exposure Factor Datasets |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Sex | Life Cycle Stage | Sample Size | Location | Type | Lab |
---|---|---|---|---|---|---|---|---|
Time of Molt | July 30-August 10 | mean annual date of molt initiation (over 3 yr) | Female | Adult | 131 | Exposure Factor Datasets | Laboratory |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Sex | Life Cycle Stage | Sample Size | Location | Type | Error |
---|---|---|---|---|---|---|---|---|
Survival/ Mortality | 0.628 | estimated annual survival rate (1960-1971) | Male | Adult | Not Reported | Malheur National Wildlife Refuge | Exposure Factor Datasets | 0.035 (SE) |
Survival/ Mortality | 0.569 | estimated annual survival rate (1960-1971) | Female | Juvenile | Not Reported | Malheur National Wildlife Refuge | Exposure Factor Datasets | 0.105 (SE) |
Survival/ Mortality | 0.586 | estimated annual survival rate (1960-1971) | Female | Adult | Not Reported | Malheur National Wildlife Refuge | Exposure Factor Datasets | 0.081 (SE) |
Exposure Endpoint Type | Endpoint Value | Sex | Life Cycle Stage | Sample Size | Location | Type | Age-Specific |
---|---|---|---|---|---|---|---|
Dietary Composition | flora (50.6%), fauna (49.4%) | Both Male and Female | Juvenile | 94 | Bear River Migratory Bird Refuge | Exposure Factor Datasets | 19-25 d |
Dietary Composition | flora (71%), fauna (29%) | Both Male and Female | Juvenile | 94 | Bear River Migratory Bird Refuge | Exposure Factor Datasets | 26-35 d |
Dietary Composition | flora (89.4%), fauna (10.6%) | Both Male and Female | Juvenile | 94 | Bear River Migratory Bird Refuge | Exposure Factor Datasets | 36-45 d |
Dietary Composition | flora (99.1%), fauna (0.92%) | Both Male and Female | Juvenile | 94 | Bear River Migratory Bird Refuge | Exposure Factor Datasets | 46-55 d |
Dietary Composition | flora (99.9%), fauna (0.08%) | Both Male and Female | Juvenile | 94 | Bear River Migratory Bird Refuge | Exposure Factor Datasets | 52-60 d |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Error | Lab |
---|---|---|---|---|---|---|---|---|---|---|
Food Ingestion Rate | 376.2 | food intake of 8 week old mallards | g/wk | Both Male and Female | Juvenile | 15 | Exposure Factor Datasets | 25.6 (SE) | Laboratory | |
Metabolic Rate | 191 | metabolized energy in 8 week old mallards | kcal/d | Both Male and Female | Juvenile | 15 | Exposure Factor Datasets | Laboratory | ||
Body Weight - Mean | 936.1 | mean body weight of 8 week old mallards | g | Both Male and Female | Juvenile | 15 | Exposure Factor Datasets | Laboratory |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type |
---|---|---|---|---|---|---|---|---|
Population Density | 6.71 (40) | mean density of breeding birds (maximum density in parentheses) | pairs/square mile | Both Male and Female | Adult | 130 sample units (160 acres/unit) | Exposure Factor Datasets |
Exposure Endpoint Type | Endpoint Value | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Condition | Error |
---|---|---|---|---|---|---|---|---|---|
Body Fat (total or %) | 104 | g (lipid) | Female | Both Adults and Juveniles | 17 | Mingo Basin | Exposure Factor Datasets | late prealternate molt | 10 SE |
Body Fat (total or %) | 134 | g (lipid) | Female | Both Adults and Juveniles | 12 | Mingo Basin | Exposure Factor Datasets | alternate plumate - early migrants, paired | 7 SE |
Body Fat (total or %) | 111 | g (lipid) | Female | Both Adults and Juveniles | 9 | Mingo Basin | Exposure Factor Datasets | alternate plumage - early migrants, unpaired | 8 SE |
Body Fat (total or %) | 145 | g (lipid) | Female | Both Adults and Juveniles | 19 | Mingo Basin | Exposure Factor Datasets | alternate plumage, paired | 7 SE |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Condition |
---|---|---|---|---|---|---|---|---|---|
Dietary Composition | Total animal, 71.9: Gastropoda, 16.4; Insecta, 27.1; Crustacea, 12.9, Oligochaeta, 11.8. Total plant, 28.1; seeds, 24.8; vegetation 3.3; roots and tubers, 2.8. |
Proportion by volume of plant and animal foods in the esophagi of mallards. | % (by volume) | Female | Not Reported | 37 | drift praire and Missouri Coteau in south-central North Dakota | Exposure Factor Datasets | during breeding season, laying female |
Exposure Endpoint Type | Endpoint Value | Units | Sex | Life Cycle Stage | Sample Size | Location | Type |
---|---|---|---|---|---|---|---|
Population Density | 76.6 | nests/km2 | Both Male and Female | Adult | Not Reported | western edge of Edmunds Co., South Dakota | Exposure Factor Datasets |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Error |
---|---|---|---|---|---|---|---|---|---|
Clutch or Litter Size | 9.3 | eggs | Female | Yearling | 7 nests | prairie pothole region in North Dakota | Exposure Factor Datasets | 1.7 SD | |
Clutch or Litter Size | 10.3 | eggs | Female | Adult | 46 nests | prairie pothole region of North Dakota | Exposure Factor Datasets | 1.1 SD | |
Time of Mating/ Laying | April 4 - July (median = May) | time of clutch initiation | Female | Adult | 265 nests | eastern - south central North Dakota, near Jamestown | Exposure Factor Datasets |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Error |
---|---|---|---|---|---|---|---|---|---|
Foraging Distance | 3.8 | foraging distance in grazed corn stubble; for foraging distance over other types of terrain, see table 3, p. 1050 | km | Not Reported | Not Reported | 66 | Platte River between Lexington and Gibbon, Nebraska | Exposure Factor Datasets | 0.4 SE |
Dietary Composition | corn (51.7%), milo (2.6%), other plant (16.5%), mollusca (snails, clams; 2.9%), insecta (0.3%) | food item occurrence in esophageal contents, expressed as aggregate percent dry weight | Not Reported | Not Reported | 68 birds | along Platte River, between Lexington and Gibbon, Nebraska | Exposure Factor Datasets |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Condition |
---|---|---|---|---|---|---|---|---|---|
Population Density | 1.0 | For explanation of classifications, see p. 11 (classifications are Kern NWR, hunting clubs, etc). | birds/ha | Not Reported | Not Reported | not reported | Tulare Basin, Kern National Wildlife Refuge | Exposure Factor Datasets | wintering birds |
Population Density | 0.25 | For explanation of classifications, see p. 11 (classifications are Kern NWR, hunting clubs, etc). | birds/ha | Not Reported | Not Reported | Not Reported | hunting clubs | Exposure Factor Datasets | wintering birds |
Population Density | 0.5 | For explanation of classifications, see p. 11 (classifications are Kern NWR, hunting clubs, etc). | birds/ha | Female | Not Reported | Not Reported | preirrigated croplands | Exposure Factor Datasets | wintering birds |
Population Density | 0.07 | For explanation of classifications, see p. 11 (classifications are Kern NWR, hunting clubs, etc). | birds/ha | Not Reported | Not Reported | Not Reported | evaporation ponds | Exposure Factor Datasets | wintering birds |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties |
---|---|---|---|---|---|---|---|---|
Population Density | 314,712 | mean number of ducks counted in U.S. Fish and Wildlife Service mid-winter inventories 1978-1987 | Both Male and Female | Both Adults and Juveniles | Not Reported | Sacramento Valley | Exposure Factor Datasets | |
Population Density | 30,438 | mean number of ducks counted in U.S. Fish and Wildlife Service mid-winter inventories 1978-1987 | Both Male and Female | Both Adults and Juveniles | Not Reported | San Joaquin Valley | Exposure Factor Datasets | |
Population Density | 15,221 | mean number of ducks counted in U.S. Fish and Wildlife Service mid-winter inventories 1978-1987 | Both Male and Female | Both Adults and Juveniles | Not Reported | Suisun Marsh | Exposure Factor Datasets | Solano |
Population Density | 4,667 | mean number of ducks counted in U.S. Fish and Wildlife Service mid-winter inventories 1978-1987 | Both Male and Female | Both Adults and Juveniles | Not Reported | San Francisco Delta | Exposure Factor Datasets |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Error |
---|---|---|---|---|---|---|---|---|---|
Duration of Incubation or Gestation | 24.5 | mean incubation period | d | Female | Adult | 66 nests | near Devil's Lake (48deg10'N, 98deg90'W) | Exposure Factor Datasets | 4.1 2SD |
Exposure Endpoint Type | Endpoint Value | Units | Sex | Life Cycle Stage | Sample Size | Location | Type |
---|---|---|---|---|---|---|---|
Home Range | 540 | ha | Female | Adult | 8 | Bemidji, Beltrami Co. | Exposure Factor Datasets |
Home Range | 620 | ha | Male | Adult | 5 | Bemidji, Beltrami Co. | Exposure Factor Datasets |
Exposure Endpoint Type | Endpoint Value | Sex | Life Cycle Stage | Sample Size | Location | Type | Age-Specific |
---|---|---|---|---|---|---|---|
Time of Nesting | April 26 - June 6 | Not Reported | prairie pothole region of North Dakota | Exposure Factor Datasets | |||
Time of Migration or Dispersal | May 5 - May 14 | Female | Not Reported | prairie pothold region of North Dakota | Exposure Factor Datasets | second year females | |
Time of Migration or Dispersal | April 20 - May 14 | Female | Adult | Not Reported | prairie pothole region of North Dakota | Exposure Factor Datasets | three years and older |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Sex | Life Cycle Stage | Sample Size | Location | Type | Age-Specific | Lab |
---|---|---|---|---|---|---|---|---|---|
Growth Rate | 1.81%/d | maximum growth rate relative to asymptotic weight | Male | Juvenile | 48 | Exposure Factor Datasets | 0-154 d | Laboratory |
Exposure Endpoint Type | Endpoint Value | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Condition | Error |
---|---|---|---|---|---|---|---|---|---|
Body Weight - Mean | 1,240 | g | Female | Adult | 220 | Illinois and Mississippi river valleys | Exposure Factor Datasets | hunter-harvested | 8 SE |
Body Weight - Mean | 1,163 | g | Male | Juvenile | 61 | Illinois and Mississippi river valleys | Exposure Factor Datasets | hunter harvested | 12 SE |
Body Weight - Mean | 1,078 | g | Female | Adult | 105 | Illinois and Mississippi river valleys | Exposure Factor Datasets | hunter-harvested | 11 SE |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Error |
---|---|---|---|---|---|---|---|---|---|
Survival/ Mortality | 59 | Survival rates, not mortality. | % | Female | Adult | Not Reported | Lower Klamath National Wildlife Refuge, CA | Exposure Factor Datasets | 3.4 SE |
Survival/ Mortality | 52 | Survival rates, not mortality. | % | Female | Juvenile | Not Reported | Lower Klamath National Wildlife Refuge | Exposure Factor Datasets | 7.8 SE |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Sex | Life Cycle Stage | Sample Size | Location | Type | Countries |
---|---|---|---|---|---|---|---|---|
Dietary Composition | gastropoda (0.001), crustacea (0.007), insecta (0.003), and plant (0.980) | mean relative proportions (wet mass) of stomach contents | Both Male and Female | Not Reported | 22 | St. Lawrence River | Exposure Factor Datasets | CANADA |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Error | Lab |
---|---|---|---|---|---|---|---|---|---|---|
Clutch or Litter Size | 10.4 | mean clutch size from first nesting attempt | eggs | Female | Adult | 151 | Exposure Factor Datasets | 0.2 (SE) | Laboratory | |
Time of Nesting | April-June | date of nest initiation | Female | Adult | 151 | Exposure Factor Datasets | Laboratory |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties | Condition |
---|---|---|---|---|---|---|---|---|---|---|
Territory Size | 70 | mean length of drainage ditch (5 ft wide) defended | yd | Male | Adult | 8 ducks | Conaway Ranch | Exposure Factor Datasets | Yolo | breeding |
Time of Hatching or Parturition | May 16-29 | peak hatching period | Both Male and Female | Hatchling | Not Reported | Conaway Ranch | Exposure Factor Datasets | Yolo | breeding |
Exposure Endpoint Type | Endpoint Value | Units | Sex | Life Cycle Stage | Sample Size | Location | Type |
---|---|---|---|---|---|---|---|
Home Range | 467.8 | ha | Female | Adult | 6 | Missouri Couteau, south-central North Dakota | Exposure Factor Datasets |
Exposure Endpoint Type | Endpoint Value | Location | Type |
---|---|---|---|
Dietary Composition | Review | Mingo Basin, Missouri | Exposure Factor Datasets |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Sex | Life Cycle Stage | Sample Size | Location | Type | Countries |
---|---|---|---|---|---|---|---|---|
Survival/ Mortality | 0.998 | spring-summer survival (proportion) | Male | Adult | 18,650 | Alberta, Saskatchewan, Manitoba | Exposure Factor Datasets | CANADA |