Sternotherus odoratus

Smith, Geoffrey R., Iverson, John B. & Rettig, Jessica E., 2022, Do observed sex ratios in a turtle community in northern Indiana vary over 35 years (1979 - 2014)?, Amphibian & Reptile Conservation (e 309) 16 (1), pp. 193-202 : 195

Sternotherus odoratus . The mean proportion of males by year was 0.66 ± 0.01 (n = 30), which is significantly different from 0.5 (t 29 = 12.66, p <0.0001). The mean proportion of males in years with> 10 individuals was 0.65 ± 0.012 (n = 28), which is significantly different from 0.5 (t 27 = 12.33, p <0.0001). The proportion of male S. odoratus observed in a year was not affected by year, trap type, or the total number of individuals caught ( Table 1).

Trachemys scripta elegans . The mean proportion of males by year was 0.44 ± 0.04 (n = 22), which is not significantly different from 0.5 (t 21 = -1.38, p = 0.18). If only years with> 10 individuals are considered, the mean proportion of males was 0.47 ± 0.06 (n = 10), which was not significantly different from 0.5 (t 9 = -0.57, p = 0.58). Year, trap type, and total number of individuals had no significant effects on the proportion of male T. s. elegans in a given year ( Table 1) .