Altitudinal variation in body size and age structure of the Sauter’s frog Rana sauteri in Taiwan

Zoological Studies

Table 2 SVL, SDI, and estimated ages of adult Rana sauteri at six altitudinal sites

Sampling sites	SVL (mm)				SDI	Mean age (year)
	Males	n	Females	n		Males	Females
330 m	43.85 ± 2.03 a	19	49.93 ± 3.01	18	0.139	2.32 ± 0.67 a	2.17 ± 0.71 a
630 m	42.02 ± 2.10 ab	26	50.09 ± 3.50	20	0.192	2.38 ± 0.80 a	2.25 ± 0.97 a
970 m	40.42 ± 2.29 bc	23	48.51 ± 3.09	17	0.200	2.30 ± 0.88 a	2.35 ± 1.00 ab
1,380 m	40.11 ± 2.68 c	28	51.17 ± 4.54	15	0.276	2.89 ± 1.10 ab	2.47 ± 1.19 ab
2,100 m	38.75 ± 1.51 cd	19	51.39 ± 3.26	8	0.326	3.37 ± 0.96 b	3.38 ± 1.06 ab
2,320 m	37.32 ± 2.03 d	47	50.91 ± 3.05	12	0.364	3.21 ± 0.83 b	3.75 ± 1.22 b
	F _5,156 = 32.62		F _5,84 = 1.37			H = 30.563	H = 18.48
	p < 0.001		p = 0.2439			p < 0.001	p = 0.0024

Values in descending order are mean ± SD. The means of SVLs of the populations were analyzed with ANOVA followed by Bonferroni’s post hoc test. The median ages were compared with Kruskal-Wallis test followed by Dunnett’s post hoc test. Values sharing the same letters (a to d) were not significantly different (p > 0.05) with post hoc pairwise comparisons. SVL, snout-vent length; SDI, index of sexual size dimorphism; n, sample size.