Coral Cover: Mauritius 2025

Shaded value = in the CV mean (shade deepens with cover) Gray italic = shown for comparison but left out of the CV mean: the gold standard (the reference value) and the manually annotated in CoralNet CoralNet benchmark annotations (reference values, not models), Coralscapes (not trusted), and any value that reuses the reference's own data n = frames behind the value — = not run or not applicable (see each region's notes) Site names and method names link out (new tab)

Coral Cover: Mauritius 2025

7 sites · 344 photos

Gold standard = 344 manually scored (via CoralNet) photos (draft manuscript).

Site	Date	Headline (site page)	Claude	Gold standard	CoralNet	DINOv3	Coralscapes v1	CoralSCOP	Mean ± SD of CV	Range
Reef Garden	2025-02-01	26%manual	27^an=105	26^an=105	28^an=105	45^an=105	38^a,b,cn=97	22^a,dn=105	30 ± 9.8	22–45
Ti Korail	2025-02-01	7.0%manual	7.4^an=40	7.0^an=40	11^an=40	22^an=40	13^a,b,cn=38	21^a,dn=40	15 ± 7.2	7.4–22
Bamboo	2025-02-04	17%manual	14^an=40	17^an=40	12^an=40	20^an=40	13^a,b,cn=39	17^a,dn=40	16 ± 3.6	12–20
Aquarium-Big Rock	2025-02-04	14%manual	8.3^an=40	14^an=40	7.0^an=40	15^an=40	8.2^a,b,cn=31	13^a,dn=40	11 ± 3.9	7.0–15
Carpenter	2025-02-09	15%manual	12^an=40	15^an=40	11^an=40	21^an=40	13^a,b,cn=31	21^a,dn=40	16 ± 5.5	11–21
Lost Anchor	2025-02-09	11%manual	9.2^an=39	11^an=39	10^an=39	20^an=39	12^a,b,cn=32	21^a,dn=39	15 ± 6.2	9.2–21
Anemone Garden	2025-02-10	2.7%manual	2.9^an=40	2.7^an=40	7.7^an=40	33^an=40	17^a,b,cn=33	31^a,dn=40	19 ± 15.5	2.9–33
All sites (six reef sites, Table 3 final row; Anemone Garden not counted)		—	13	15	13	24	16	19	17 ± 5.3	13–24

Notes for Mauritius 2025 (8)

[a] Value from the map's computer-vision method tables (denominator and photo set as on the site's page).
[b] Coralscapes (v1 EPFL-ECEO/coralscapes-vit-b-dpt; v2 coralscapesv2-dinov3-vitb-lora-dpt) is not considered reliable for these photos: shown, never averaged. Area fraction, not a point count.
[c] Coralscapes v1 (ver. 1; Sauder et al., 2025) = Table 3 of the Mauritius manuscript (Mayfield et al. 2026 Platax): pixel-area segmentation on the 301 fully human-labeled frames (Table 3 note); never averaged.
[d] CoralSCOP = per-frame sum of colony-mask area fractions (zero-filled; overlapping masks double-count), averaged over frames with an ok row. Area index, not a point count: denominator differs from any point-count reference. It is also unstable frame to frame (the same subject has scored 94.1% in one photo and 23.3% in another), and the mask sum overstates cover most on the healthiest reefs.
Mean/Range: Mean ± SD and Range are over the CV cells that enter the mean (CoralNet where independent, DINOv3, CoralSCOP unedited/edited, Claude). Gold standard, frames manually annotated in CoralNet, Coralscapes and same-measurement cells are shown in gray italic but never averaged.
Headline (site page): the coral-cover figure the site's page, report card and map pop-up print, with its method; it is never averaged into the CV mean.
Methods: Claude (Anthropic); DINOv3 (Meta; paper; used here as the frozen backbone of the in-house classifier); Coralscapes v1 and v2 (EPFL-ECEO; dataset paper, code); CoralSCOP (Zheng et al., CVPR 2024); CoralNet.
Sites: names drop the region prefix (hover for the full name) and link to the site's CRD page, or to the regional summary page where the site has none. Date = survey date from the map pins (first–last visit); sites are listed earliest first, undated sites last.

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