Table 4 Summary of the objective, method and data set used for each visual or statistical analysis completed.
Objective | Method | Dataset used | Visual or statistical analysis |
|---|---|---|---|
Prevalence of pigmentation | Manual inspection for pigment | Dataset of 1,680 dorsal fin images from 510 unique adults collected over 31 photo-id sessions (days). This dataset only included images of adult individuals of good- or excellent photo-quality, but were not included into the catalogue. Photo-id sessions included in this database (n = 31) were chosen by random sub-sampling of the total photo-id sessions (n = 941). This dataset was used because it was not biased by cataloguing purposes, i.e. the catalogue images were deemed to be more likely to have pigmentation since its presence was used as a secondary identifier. | Visual |
Stability of pigmentation over time | Manual inspection for pigment change | The catalogue - dataset of 779 dorsal fin images from 169 unique adults. | Visual |
Seriation test | Dataset of 129 dorsal fin images from 15 unique adults. These 15 individuals were the most encountered dolphins within the catalogue. | Statistical | |
Discriminatory power of pigmentation | Manual matching | The catalogue - dataset of 779 dorsal fin images from 169 unique adults. | Visual |
Linear Discriminant Analysis | Statistical |
