Table 2

Sample size (n), mean (±standard error, Sx¯Mathematical equation), range of carapace length (CL) and weight, and upper 25% CL (UQCL) and weight (UQW) of adult western pond turtles (Actinemys) captured at Gorman Pond, Los Angeles, California, USA, in 2017 and 2019, and 2020 and 2023. Carapace lengths are for the last capture, and weight is the heaviest of the turtles obtained and does not include recaptures in either time period. Weight of females excludes those that were gravid. For mean CL, males were significantly longer in 2020 and 2023 than in 2017 and 2019, and no other comparisons were significant. Both combined mean CL (all) and UQCL in 2020 and 2023 were significantly larger than for 2017 and 2019. For weight, females in 2020 and 2023 were significantly heavier than males in 2017 and 2019, and for combined weights (all), turtles were heavier in 2020 and 2023 than in 2017 and 2019, although UQW did not differ significantly between time periods

CL (mm) Weight (g)


n Mean ±x¯Mathematical equation Range UQCL n Mean ± Sx¯Mathematical equation Range UQW
2017, 2019
Males 11 137.5 ± 2.90 125–152 149.7 12 348.8 ± 24.26 266–515 501.7
Females 20 139.5 ± 2.31 121–161 152.6 18 486.2 ± 21.61 385–711 616.5
All 31 138.7 ± 1.79 121–161 151.3 30 445.6 ± 18.41 266–711 567.3
2020, 2023
Males 12 147.4 ± 3.23 120–158 156.3 12 445.7 ± 24.77 254–591 540.7
Females 23 144.1 ± 1.81 122–161 154.2 22 530.7 ± 15.85 376–697 646.8
All 35 145.2 ± 1.62 120–161 155.4 34 500.7 ± 15.02 254–697 601.3

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