Table 2
Sample size (n), mean (±standard error, S
), 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 ±
|
Range | UQCL | n | Mean ± S
|
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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