Least Tern (Sterna antillarum)
Least Tern (Sterna antillarum)
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Sex | Life Cycle Stage | Sample Size | Location | Type | Countries |
---|---|---|---|---|---|---|---|---|
Hatching Success | See citation Figure 2 | Nests hatched | Embryo | See citation | Gibson Generating Station, Gibson County | Exposure Factor Datasets | USA | |
Hatching Success | See citation Figure 2 | Young fledged | NR | Fledgling | See citation | Gibson Generating Station, Gibson County | Exposure Factor Datasets | USA |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Life Cycle Stage | Sample Size | Location | Type | Countries |
---|---|---|---|---|---|---|---|---|
Time of Mating/ Laying | 1995: 179, 1996: 182, 1997: 161 | Clutch initiation dates | Julian date | Embryo | 1995: 240, 1996: 161, 1997: 481 | Kangaroo Pt., lower Mississippi River | Exposure Factor Datasets | USA |
Hatching Success | 1995: 0.97, 1996: 0.03, 1997: 0.93 | Ratio of hatched eggs:total eggs | Embryo | 1995: 1472, 1996: 624, 1997: 349 | Cow Island, lower Mississippi River | Exposure Factor Datasets | USA | |
Hatching Success | 1995: 0.93, 1996: 0.30, 1997: 0.08 | Ratio of hatched eggs:total eggs | Embryo | 1995: 520, 1996: 911, 1997: 671 | Porter Lake, lower Mississippi River | Exposure Factor Datasets | USA | |
Hatching Success | 1995: 0.95, 1996: 0.90, 1997: 0.59 | Ratio of hatched eggs:total eggs | Embryo | 1995: 602, 1996: 483, 1997: 708 | St. Francis, lower Mississippi River | Exposure Factor Datasets | USA | |
Hatching Success | 1995: 0.87, 1996: 0.63, 1997: 0.40 | Ratio of hatched eggs:total eggs | Embryo | 1995: 527, 1996: 397, 1997: 727 | Kangaroo Pt., lower Mississippi River | Exposure Factor Datasets | USA | |
Clutch or Litter Size | 1995: 2.7, 1996: 2.3, 1997: 2.0 | Clutch size | Mean number of eggs/nest | Embryo | 1995: 550, 1996: 265, 1997: 172 | Cow Island, lower Mississippi River | Exposure Factor Datasets | USA |
Clutch or Litter Size | 1995: 2.6, 1996: 2.3, 1997: 1.9 | Clutch size | Mean number of eggs/nest | Embryo | 1995: 201, 1996: 392, 1997:361 | Porter Lake, lower Mississippi River | Exposure Factor Datasets | USA |
Clutch or Litter Size | 1995: 2.4, 1996: 2.6, 1997: 1.9 | Clutch size | Mean number of eggs/nest | Embryo | 1995: 245, 1996: 183, 1997: 374 | St. Francis, lower Mississippi River | Exposure Factor Datasets | USA |
Clutch or Litter Size | 1995: 2.4, 1996: 2.5, 1997: 2.1 | Clutch size | Mean number of eggs/nest | Embryo | 1995: 219, 1996: 159, 1997: 346 | Kangaroo Pt., lower Mississippi River | Exposure Factor Datasets | USA |
Time of Mating/ Laying | 1995: 181, 1996: 184, 1997: 199 | Clutch initiation dates | Julian date | Embryo | 1995: 546, 1996: 272, 1997: 182 | Cow Island, lower Mississippi River | Exposure Factor Datasets | USA |
Time of Mating/ Laying | 1995: 183, 1996: 187, 1997: 187 | Clutch initiation dates | Julian date | Embryo | 1995: 195, 1996: 371, 1997: 372 | Porter Lake, lower Mississippi River | Exposure Factor Datasets | USA |
Time of Mating/ Laying | 1995: 187, 1996: 192 1997: 187 | Clutch initiation dates | Julian date | Embryo | 1995: 255, 1996: 196, 1997: 382 | St. Francis, lower Mississippi River | Exposure Factor Datasets | USA |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Sex | Life Cycle Stage | Sample Size | Location | Type | Countries |
---|---|---|---|---|---|---|---|---|
Hatching Success | 43-62% | Fledging success | NR | Fledgling | 110 | Lower Mississippi River | Exposure Factor Datasets | USA |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Sex | Life Cycle Stage | Sample Size | Location | Type | Countries |
---|---|---|---|---|---|---|---|---|
Hatching Success | 0-1.4 | Chicks fledged/pair | NR | Fledgling | 110 | Lower Mississippi River | Exposure Factor Datasets | USA |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Sex | Life Cycle Stage | Location | Type | Countries |
---|---|---|---|---|---|---|---|
Hatching Success | 0.59 | Fledglings/pair | NR | Fledgling | Arkansas River at Tulsa | Exposure Factor Datasets | USA |
Population Density | 140 | Adult pairs along 94 km | B | Adult | Arkansas River at Tulsa | Exposure Factor Datasets | USA |
Hatching Success | 0.67 | Fledglings/pair | NR | Fledgling | Arkansas River at Tulsa | Exposure Factor Datasets | USA |
Population Density | 212 | Adult pairs along 94 km | B | Adult | Arkansas River at Tulsa | Exposure Factor Datasets | USA |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Life Cycle Stage | Location | Type | Countries |
---|---|---|---|---|---|---|
Survival/ Mortality | Review | Percent survival | Embryo | Salt Plains National Wildlife Refuge | Exposure Factor Datasets | USA |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Sample Size | Location | Type | California Counties | Countries |
---|---|---|---|---|---|---|---|
Hatching Success | Review | Fledglings per nest | 522 | Venice Beach | Exposure Factor Datasets | Los Angeles | USA |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Location | Type | Countries |
---|---|---|---|---|---|---|---|---|
Hatching Success | 0.14-0.74 | Fledging success | Number of fledgings/number of hatched chicks | NR | Fledgling | Towsn of Wells & Kennebunk | Exposure Factor Datasets | USA |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Life Cycle Stage | Sample Size | Location | Type | Countries |
---|---|---|---|---|---|---|---|---|
Clutch or Litter Size | 2.25 | Mean clutch size | Eggs | Embryo | 20 nests | Priarie Dog Town Fork of the Red River in Childress County | Exposure Factor Datasets | USA |
Time of Nesting | June 1-July 10 | Nest initiation | 20 nests | Priarie Dog Town Fork of the Red River in Childress County | Exposure Factor Datasets | USA |
Exposure Endpoint Type | Chemical | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type |
---|---|---|---|---|---|---|---|---|---|
DDE (4,4'-), POLYCHLORINATED BIPHENYLS | 7% decrease | eggshell thickness compared with pre-1947 reference eggs | Female | Adult | 20 eggs | Cape Romain National Wildlife Refuge | Toxicity Factor Datasets | ||
Clutch or Litter Size | 1.73 | mean clutch size | eggs/clutch | Female | Adult | 396 clutches | Cape Romain National Wildlife Refuge | Exposure Factor Datasets |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Sex | Life Cycle Stage | Sample Size | Location | Type |
---|---|---|---|---|---|---|---|
Time of Molt | May-Jul | timing of primary molt | Not Reported | Adult | 190 birds | coastal areas | Exposure Factor Datasets |
Time of Molt | mid/late Jul-Sep | timing of pre-basic molt | Not Reported | Adult | Not Reported | coastal areas | Exposure Factor Datasets |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Error |
---|---|---|---|---|---|---|---|---|---|
Fledging or Weaning Rate | 76.8 | estimated survival rate of banded juveniles | % | Not Reported | Fledgling | Not Reported | Aransas and San Patricio Counties | Exposure Factor Datasets | 2.0 2SE |
Fledging or Weaning Rate | estimated fledgling production among 4 colonies | fledglings/breeding pairs | Not Reported | Fledgling | 26-140 pairs/colony | Aransas and San Patricio Counties | Exposure Factor Datasets |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type |
---|---|---|---|---|---|---|---|---|
Hatching Success | 0.79-1.31 | mean hatching success during two years of study | eggs hatched/nest | Not Reported | Chick | 545-606 nests per study year | Sandy Point, West Haven | Exposure Factor Datasets |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type |
---|---|---|---|---|---|---|---|---|
Time of Nesting | June 16, June 30, July 1 | mean nest-initiation dates over 3 years of study | Both Male and Female | Adult | 6-17 nests/study year | Yellowstone River | Exposure Factor Datasets | |
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 |
Fledging or Weaning Rate | 0.1-1.4 | range of mean fledging success over 3 study years | fledglings/nest | Not Reported | Juvenile | 6-18 nests/study year | Yellowstone River | Exposure Factor Datasets |
California Least Tern (Sterna antillarum ssp. browni)
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties | Error |
---|---|---|---|---|---|---|---|---|---|---|
Age at Fledging, Metamorphosis, Weaning | 20 | approximate age of fledging (first flight) | d | Not Reported | Fledgling | 2 birds | Sunset Aquatic Park, Huntington Beach | Exposure Factor Datasets | Orange | |
Survival/ Mortality | proportion of hatched birds that survived during post-fledging period, 2 years | % | Not Reported | Hatchling | 42-140 hatched birds/year | Sunset Aquatic Park, Huntington Beach | Exposure Factor Datasets | Orange | ||
Time of Migration or Dispersal | late Apr | time of arrival at breeding grounds | Both Male and Female | Adult | 2 colonies | Sunset Aquatic Park, Huntington Beach; Santa Margarita Lagoon | Exposure Factor Datasets | Orange | ||
Clutches or Litters per year | 1 | normal number of broods per year | Both Male and Female | Adult | Not Reported | Sunset Aquatic Park, Huntington Beach; Santa Margarita Lagoon | Exposure Factor Datasets | Orange | ||
Time of Mating/ Laying | May-Jul | period of egg laying, 2 years | Female | Adult | 2 colonies | Sunset Aquatic Park, Huntington Beach | Exposure Factor Datasets | Orange | ||
Clutch or Litter Size | 2 | most frequent clutch size, 2 years | Female | Adult | 96 nests | Sunset Aquatic Park, Huntington Beach | Exposure Factor Datasets | Orange | ||
Duration of Incubation or Gestation | 22 | most frequent incubation period, 2 years | d | Not Reported | Embryo | 41 clutches | Sunset Aquatic Park, Huntington Beach | Exposure Factor Datasets | Orange | |
Hatching Success | range of hatching success, 2 years | % | Not Reported | Hatchling | 53-157 eggs/year | Sunset Aquatic Park, Huntington Beach | Exposure Factor Datasets | Orange | ||
Body Weight - Mean | 5.93 | mean body weight of day 0 chicks | g | Not Reported | Hatchling | 77 birds | Sunset Aquatic Park, Huntington Beach | Exposure Factor Datasets | Orange | 0.09 2SE |
Body Weight - Mean | 39.62 | asymptotic body weight of juveniles at 15 days of age | g | Not Reported | Fledgling | 8 birds | Sunset Aquatic Park, Huntington Beach | Exposure Factor Datasets | Orange | 0.73 2SE |
Time of Migration or Dispersal | first two wks Apr | timing of dispersal from breeding areas | Both Male and Female | Both Adults and Juveniles | 1 colony | Sunset Aquatic Park, Huntington Beach | Exposure Factor Datasets | Orange |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | Countries |
---|---|---|---|---|---|---|---|---|---|
Time of Mating/ Laying | May to Aug | beginning to end of nesting period | Both Male and Female | Adult | 1 colony | Cuixmala Beach [19 deg, 22'14"N, 104 deg 59'31"W] | Exposure Factor Datasets | MEXICO | |
Population Density | 40 | density of nests at one colony | nests/1400 m^2 | Both Male and Female | Adult | 1 colony | Cuixmala Beach [19 deg, 22'14"N, 104 deg 59'31"W] | Exposure Factor Datasets | MEXICO |
Clutch or Litter Size | range of average clutch sizes, 2 years | eggs/clutch | Female | Adult | 16-58 nests/year | Cuixmala Beach [19 deg, 22'14"N, 104 deg 59'31"W] | Exposure Factor Datasets | MEXICO | |
Fledging or Weaning Rate | range of fledging rates, 2 years | fledglings/nests | Not Reported | Fledgling | 16-58 nests/year | Cuixmala Beach [19 deg, 22'14"N, 104 deg 59'31"W] | Exposure Factor Datasets | MEXICO | |
Hatching Success | range of egg hatching rates, 2 years | % | Not Reported | Hatchling | 16-58 nests/year | Cuixmala Beach [19 deg, 22'14"N, 104 deg 59'31"W] | Exposure Factor Datasets | MEXICO |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties |
---|---|---|---|---|---|---|---|---|---|
Time of Mating/ Laying | May-early Jul (first wave), late May-Aug (second wave) | nesting periods of early (first wave) and late (second wave) birds | Both Male and Female | Adult | 8-10 pairs (first wave), 29 pairs (second wave) | NASA Island, Seal Beach National Wildlife Refuge | Exposure Factor Datasets | Orange | |
Fledging or Weaning Rate | 0.50 (first wave), 0.58 (second wave) | mean number of fledglings produced per nesting pair | fledglings/pair | Not Reported | Fledgling | 10 nests (first wave), 33 nests (second wave) | NASA Island, Seal Beach National Wildlife Refuge | Exposure Factor Datasets | Orange |
Hatching Success | 100% (first wave), 82% (second wave) | proportions of eggs hatched of eggs laid | Not Reported | Hatchling | 54 eggs (second wave) | NASA Island, Seal Beach National Wildlife Refuge | Exposure Factor Datasets | Orange | |
Clutch or Litter Size | 2.33 (first wave), 1.70 (second wave) | average clutch sizes for early and late nesters | eggs/clutch | Female | Adult | 10 nests (first wave), 33 nests (second wave) | NASA Island, Seal Beach National Wildlife Refuge | Exposure Factor Datasets | Orange |
Age at Sexual Maturity | 2 | age of birds nesting for the first time | yr | Both Male and Female | Adult | 10 pairs | NASA Island, Seal Beach National Wildlife Refuge | Exposure Factor Datasets | Orange |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties |
---|---|---|---|---|---|---|---|---|
Survival/ Mortality | 17/32 to 33/33 | range of numbers of clutches lost of total numbers of clutches in a colony | Not Reported | Chick, Embryo | 7 colonies, 8 years | coast | Exposure Factor Datasets | Los Angeles, Orange |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties | Error |
---|---|---|---|---|---|---|---|---|---|---|
Fledging or Weaning Rate | average number of fledglings produced per pair, over 13 years | fledglings/pair | Not Reported | Fledgling | 35-165 pairs/year | Venice (beach) | Exposure Factor Datasets | Los Angeles | ||
Fledging or Weaning Rate | average number of fledglings produced per pair, over 13 years | fledglings/pair | Not Reported | Fledgling | 775-1,264 pairs/year | statewide | Exposure Factor Datasets | |||
Age at Sexual Maturity | 2 | earliest age at which adults were known to breed for the first time | yr | Not Reported | Adult | 186 birds | Venice (beach) | Exposure Factor Datasets | Los Angeles | |
Longevity | 13 | age of oldest banded breeding birds | yr | Not Reported | Adult | 40-105 birds/year | Venice (beach) | Exposure Factor Datasets | Los Angeles | |
Survival/ Mortality | 0.88 | overall survival rate for adults that have returned to breed once | Not Reported | Adult | 82-165 breeding pairs/year | Venice (beach) | Exposure Factor Datasets | Los Angeles | ||
Survival/ Mortality | 0.16 | rate at which chicks survived to breed at least once | Not Reported | Chick | 84-285 chicks/year | Venice (beach) | Exposure Factor Datasets | Los Angeles | ||
Longevity | 9.63 | expected number of breeding years per adult bird | yr | Not Reported | Adult | 372 birds | Venice (beach) | Exposure Factor Datasets | Los Angeles | 6.55-14.48 95% CI |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type |
---|---|---|---|---|---|---|---|---|
Fledging or Weaning Rate | 0.69 | statewide average annual fledging rate, 13 years | fledglings/pair | Not Reported | Fledgling | 832-1708 nesting pairs/year | Exposure Factor Datasets |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties |
---|---|---|---|---|---|---|---|---|---|
Territory Size | 40 | radius of nesting territory | cm | Both Male and Female | Adult | Not Reported | Huntington Beach State Park | Exposure Factor Datasets | Orange |
Clutch or Litter Size | eggs/clutch | Female | Adult | 12 clutches | Huntington Beach State Park | Exposure Factor Datasets | Orange |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties |
---|---|---|---|---|---|---|---|---|---|
Foraging Distance | foraging distance from nesting sites | mi | Not Reported | Adult | 10-11 surveys/site | Venice Beach, Huntington Beach, Santa Margarita River | Exposure Factor Datasets | Los Angeles, Orange | |
Time of Migration or Dispersal | late Jul | timing of post-fledging dispersal | Not Reported | Both Adults and Juveniles | Not Reported | Santa Margarita River | Exposure Factor Datasets | Orange |
Exposure Endpoint Type | Endpoint Value | Endpoint Description | Units | Sex | Life Cycle Stage | Sample Size | Location | Type | California Counties |
---|---|---|---|---|---|---|---|---|---|
Time of Migration or Dispersal | late Aug-Sep | timing of departure from breeding areas | Not Reported | Both Adults and Juveniles | 4 nesting areas, 2 years | Santa Margarita River at Camp Pendleton | Exposure Factor Datasets | Orange | |
Clutch or Litter Size | range of average clutch sizes over 2 years | eggs/clutch | Not Reported | Both Adults and Juveniles | 230-336 nests | Santa Margarita River at Camp Pendleton | Exposure Factor Datasets | Orange | |
Hatching Success | proportion of eggs hatched of total eggs laid over 2 years | % | Not Reported | Hatchling | 419-734 eggs | Santa Margarita River at Camp Pendleton | Exposure Factor Datasets | Orange | |
Survival/ Mortality | estimated annual mortality rate for two years based on juvenile censuses | % | Not Reported | Juvenile | 92-195 birds counted | Santa Margarita River at Camp Pendleton | Exposure Factor Datasets | Orange |