Table 1.

Summary of towed-diver surveys, range of values of covariates, and total number of sharks observed by region^a

						Number of sharks observed
Region	Reefs/surveys	Number of humans <200 km from reef (1000s)	Oceanic primary productivity (mg C·m−2·day−1)	Minimum monthly SSTb (°C)	Reef area (km2)	GR	WT	BT	Ga	Nu
MHI	9/336	51–970	234–270	23.8–24.4	71–1662	16	27	−	12	−
NWHI	9/219	0–0.2	244–290	19.2–23.1	317–2447	62	102	−	104	−
Mariana I.	16/371	0–101	121–165	25.8–27.3	4–203	304	227	17	−	52
Am. Sam.	5/364	0.01–105	130–151	27.3–28.3	18–353	30	82	23	−	6
PRIA	7/317	0–0.01	147–445	25.3–27.3	20–240	2891	433	226	6	−
Total	46/1607					3303	871	266	122	58

^aAbbreviations: MHI, main Hawaiian Islands; NWHI, northwestern Hawaiian Islands; Am. Sam., American Samoa; PRIA, Pacific remote island areas; GR, gray reef shark (C. amlyrhynchos); WT, whitetip reef shark (T. obesus); BT, blacktip reef shark (C. melanopterus); Ga, Galapagos shark (C. galapagensis); Nu, tawny nurse shark (N. ferugineus).

^bSea surface temperature.