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Thamnophis sirtalis ssp. concinnus

Citation:

Some observations on the natural history of two Oregon garter snakes (Genus Thamnophis)

Author(s)
Stewart, Glenn R.
Pages
71-86
Year
Volume
2
Exposure Endpoint Type Endpoint Value Endpoint Description Range Units Sex Life Cycle Stage Location Sample Size Type
Time of Mating/ Laying Feb. - Apr. time of breeding Both Male and Female Adult Willamette Valley Not Reported Exposure Factor Datasets
Time of Hatching or Parturition late July - early Sept. Both Male and Female Embryo Willamette Valley Not Reported Exposure Factor Datasets
Duration of Incubation or Gestation 90 d Female Adult Willamette Valley Not Reported Exposure Factor Datasets
Age at Sexual Maturity 1 yr Male Adult Willamette Valley Not Reported Exposure Factor Datasets
Age at Sexual Maturity 2 yr Female Adult Willamette Valley Not Reported Exposure Factor Datasets
Clutch or Litter Size 8.2 determined by palpation 5 - 23 young/litter Female Adult Willamette Valley 18 Exposure Factor Datasets
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