| Exposure Endpoint Type | Endpoint Description | Endpoint Value | Sample Size | Units | Life Cycle Stage | Specific Location | Range | California Counties | Type |
|---|---|---|---|---|---|---|---|---|---|
| Survival/ Mortality | proportion of hatched birds that survived during post-fledging period, 2 years | 42-140 hatched birds/year | % | Hatchling | Sunset Aquatic Park, Huntington Beach | 11-33 | Orange | Exposure Factor Datasets | |
| Time of Migration or Dispersal | time of arrival at breeding grounds | late Apr | 2 colonies | Adult | Sunset Aquatic Park, Huntington Beach; Santa Margarita Lagoon | Orange | Exposure Factor Datasets | ||
| Clutches or Litters per year | normal number of broods per year | 1 | Not Reported | Adult | Sunset Aquatic Park, Huntington Beach; Santa Margarita Lagoon | Orange | Exposure Factor Datasets | ||
| Time of Mating/ Laying | period of egg laying, 2 years | May-Jul | 2 colonies | Adult | Sunset Aquatic Park, Huntington Beach | Orange | Exposure Factor Datasets | ||
| Clutch or Litter Size | most frequent clutch size, 2 years | 2 | 96 nests | Adult | Sunset Aquatic Park, Huntington Beach | 1-3 | Orange | Exposure Factor Datasets | |
| Duration of Incubation or Gestation | most frequent incubation period, 2 years | 22 | 41 clutches | d | Embryo | Sunset Aquatic Park, Huntington Beach | 20-25 | Orange | Exposure Factor Datasets |
| Hatching Success | range of hatching success, 2 years | 53-157 eggs/year | % | Hatchling | Sunset Aquatic Park, Huntington Beach | 80-90 | Orange | Exposure Factor Datasets | |
| Body Weight - Mean | mean body weight of day 0 chicks | 5.93 | 77 birds | g | Hatchling | Sunset Aquatic Park, Huntington Beach | Orange | Exposure Factor Datasets | |
| Body Weight - Mean | asymptotic body weight of juveniles at 15 days of age | 39.62 | 8 birds | g | Fledgling | Sunset Aquatic Park, Huntington Beach | Orange | Exposure Factor Datasets | |
| Time of Migration or Dispersal | timing of dispersal from breeding areas | first two wks Apr | 1 colony | Both Adults and Juveniles | Sunset Aquatic Park, Huntington Beach | Orange | Exposure Factor Datasets | ||
| Age at Fledging, Metamorphosis, Weaning | approximate age of fledging (first flight) | 20 | 2 birds | d | Fledgling | Sunset Aquatic Park, Huntington Beach | Orange | Exposure Factor Datasets |
