California Brown Pelican (Pelecanus occidentalis ssp. californicus)
California Brown Pelican (Pelecanus occidentalis ssp. californicus)
| Chemical | Endpoint Value | Endpoint Description | Sex | Life Cycle Stage | Sample Size | Location | Type |
|---|---|---|---|---|---|---|---|
| DDD (4,4'-), DDE (4,4'-), DDT (4,4'-) | significantly decreased compared to pre-1943 samples | eggshell thickness (of intact or broken eggshells) | Female | Adult | 86 eggs | Anacapa Island and Isla Coronado Norte | Toxicity Factor Datasets |
| DDD (4,4'-), DDE (4,4'-), DDT (4,4'-) | increased compared to positive control (1969 data) | mean number of fledglings produced per nest in 1974 | Both Male and Female | Fledgling | 1286 nests | Anacapa Island and Isla Coronado Norte | Toxicity Factor Datasets |
| DDD (4,4'-), DDE (4,4'-), DDT (4,4'-) | non-detectable DDT plus TDE, 96.6 ppm DDE, lipid wet basis | concentration in egg contents | Female | Adult | 39 eggs | Anacapa Island and Isla Coronado Norte | Toxicity Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Sex | Life Cycle Stage | Sample Size | Location | Type |
|---|---|---|---|---|---|---|---|
| Dietary Composition | northern anchovy, Engraulis mordax (80%) | percent of estimated prey biomass, from pre-fledgling regurgitations | Not Reported | Nestling | 3 colonies | Southern California Bight | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Description | Sex | Life Cycle Stage | Sample Size | Location | Type |
|---|---|---|---|---|---|---|
| Fledging or Weaning Rate | range of mean fledging rates (number of fledglings per built nest) over a 6 year period | Not Reported | Fledgling | 76-1258 nests/year | West Anacapa Island | Exposure Factor Datasets |
| Fledging or Weaning Rate | range of mean fledging rates (number of fledglings per built nest) over a 6 year period | Not Reported | Fledgling | 76-1258 nests/year | Isla Coronado Norte | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type |
|---|---|---|---|---|---|---|---|
| Foraging Distance | distance travelled by radiotagged bird | km/day | Not Reported | Juvenile | 1 bird | south Monterey Bay | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Sex | Life Cycle Stage | Sample Size | Location | Type | Condition |
|---|---|---|---|---|---|---|---|---|
| Survival/ Mortality | 69% | estimated survival rate of radiotagged rehabilitated oiled birds at 150-180 days post-release | Not Reported | Adult | 16 | Southern California Bight | Exposure Factor Datasets | rehabilitated oiled birds |
| Survival/ Mortality | 94% | estimated survival rate of radiotagged control birds at 150-180 days post-release | Not Reported | Adult | 17 | Southern California Bight | Exposure Factor Datasets |
| Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Error |
|---|---|---|---|---|---|---|---|---|---|
| Time of Migration or Dispersal | early to mid-summer | time of northward movement from southern breeding areas | Both Male and Female | Both Adults and Juveniles | 3 years | northern and central coast | Exposure Factor Datasets | ||
| Population Density | 0.23 | mean density at sea off central and northern coast | birds/km^2 | Both Male and Female | Both Adults and Juveniles | 3 years | central and northern coast | Exposure Factor Datasets | 0.23 SE |
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