Fig 1.
The turtle breeding and rehabilitation center (TBRC) Sarnath, Varanasi, India.
Base map source- Naturalearth.
Fig 2.
Morphometric measurements (e.g. SCL) were obtained using the vernier caliper of Batagur kachuga.
Fig 3.
Morphometric measurements of the carapace of Batagur dhongoka (Illustration) showing the straight carapace length (SCL) and Straight carapace width (SCW).
Fig 4.
Morphometry data acquisition, analysis and storage using ImageJ.
Fig 5.
ImageJ step-by-step method for the digital morphometry process.
Fig 6.
Morphometry of Carapace of Batagur dhongoka using ImageJ (A) SCL-straight carapace length and (B) SCW-straight carapace width.
Fig 7.
The correlation coefficient between the vernier caliper and the ImageJ for both the measurement of (A) carapace length and (B) carapace width.
Table 1.
Carapace dimensions and errors with the vernier caliper and the ImageJ method.
Table 2.
P-values obtained using the t-test paired two samples for means using vernier calipers and ImageJ measurements.
Table 3.
Time is taken for measurements using the vernier caliper and the ImageJ methods.
Fig 8.
Relationship between measurements from the digital image processing (ImageJ) and those obtained with the vernier caliper (A) straight carapace length (B) straight carapace width. (Triangles, squares, circles, and other symbols indicate different turtle species).
Fig 9.
Relationship between the statistical error due to each method and the length and width measurement (A) Straight Carapace length (B) Straight Carapace Width. (Each turtle species is represented by a unique shape).