Table 2.
Species | Common Name | Main Hawaiian Islands (MHI) | Northwestern Hawaiian Islands (NWHI) | Abundance Ratio | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
n | Mean MaxN | % Drops | Min. depth (m) | Max.depth (m) | Islands | n | Mean MaxN | % Drops | Min. depth (m) | Max.depth (m) | Islands | NWHI:MHI | ||
Barracuda (Sphyraenidae) | ||||||||||||||
Sphyraena barracuda | Great barracuda | 2 | 0.02 ± 0.01 | 1.9 | 30.2 | 53.9 | Molokai | — | — | — | — | — | — | — |
Snappers (Lutjanidae) | ||||||||||||||
Aprion virescens | Green jobfish | 43 | 0.41 ± 0.11 | 26.2 | 13.4 | 94.8 | All | 80 | 1.03 ± 0.16 | 73.1 | 2.7 | 100.0 | All | 2.51 |
Jacks (Carangidae) | ||||||||||||||
Main species | ||||||||||||||
Carangoides orthogrammus | Island jack | 40 | 0.37 ± 0.13 | 15.9 | 17.1 | 96.6 | Maui, Lanai, Oahu | 15 | 0.19 ± 0.08 | 9.0 | 5.5 | 50.3 | FFS, LIS, PHR | 0.51 |
Caranx melampygus | Bluefin trevally | 46 | 0.43 ± 0.09 | 26.2 | 3.0 | 46.6 | All | 43 | 0.55 ± 0.14 | 34.6 | 2.7 | 50.3 | All | 1.28 |
Caranx ignobilis | Giant trevally | 9 | 0.08 ± 0.03 | 7.5 | 30.8 | 80.8 | Maui, Molokai, Oahu | 67 | 0.86 ± 0.29 | 28.2 | 2.7 | 50.3 | All | 10.75 |
Pseudocaranx cheilio | Thick-lipped jack | — | — | — | — | — | — | 37 | 0.47 ± 0.31 | 10.3 | 40.5 | 100.0 | PHR, MID | — |
Seriola dumerili | Greater amberjack | 6 | 0.06 ± 0.03 | 4.7 | 42.7 | 92.0 | Molokai, Oahu | 55 | 0.71 ± 0.39 | 14.1 | 23.5 | 93.3 | FFS, LIS, PHR | 11.83 |
Seriola rivoliana | Almaco jack | 6 | 0.06 ± 0.03 | 2.8 | 21.3 | 92.0 | Molokai, Oahu | 27 | 0.35 ± 0.17 | 16.7 | 24.7 | 100.0 | LIS, PHR, MID | 5.83 |
Unidentified Seriola sp.* | — | — | — | — | — | — | 7 | 0.09 ± 0.04 | 7.7 | 60.4 | — | FFS, LIS, PHR | — | |
Subtotal Seriola sp.** | 12 | 0.12 ± 0.05 | 6.5 | 21.3 | 92.0 | 89 | 1.13 ± 0.42 | 29.5 | 23.5 | 100.0 | 9.42 | |||
Other species | ||||||||||||||
Alectis ciliaris | Threadfin jack | 5 | 0.05 ± 0.02 | 0.9 | 58.5 | — | Oahu | — | — | — | — | — | — | — |
Carangoides ferdau | Barred jack | 4 | 0.04 ± 0.03 | 1.9 | 14.3 | 30.5 | Maui, Oahu | 1 | 0.01 ± 0.01 | 1.3 | 37.8 | — | FFS | 0.25 |
Elagatis bipinnulata | Rainbow runner | 1 | 0.01 ± 0.01 | 0.9 | 14.9 | — | Lanai | — | — | — | — | — | — | — |
Gnathanodon speciosus | Yellow trevally | 2 | 0.02 ± 0.01 | 1.9 | 14.3 | 42.4 | Maui, Oahu | — | — | — | — | — | ` | — |
Scomberoides lysan | Queenfish | 3 | 0.03 ± 0.02 | 2.8 | 3.05 | 30.5 | Lanai, Maui, Oahu | — | — | — | — | — | — | — |
Seriola lalandi | Yellowtail amberjack | — | — | — | — | — | — | 5 | 0.06 ± 0.03 | 2.6 | 65.5 | 85.3 | LIS, PHR | — |
Unidentified Carangidae | 9 | 0.08 ± 0.04 | 4.7 | 4.6 | 96.6 | Maui, Oahu | 3 | 0.04 ± 0.03 | 2.6 | 43.6 | 55.8 | FFS, PHR | 0.50 | |
Subtotal Other species | 24 | 0.22 ± 0.05 | 11.2 | 4.6 | 96.6 | 9 | 0.12 ± 0.06 | 6.4 | 37.8 | 85.3 | 0.55 | |||
Subtotal all jacks | 131 | 1.22 ± 0.19 | 48.6 | 4.6 | 96.6 | 260 | 3.33 ± 0.7 | 70.5 | 2.7 | 100.0 | 2.73 | |||
Sharks (Carcharhinidae) | ||||||||||||||
Main species | ||||||||||||||
Carcharhinus galapagensis | Galapagos shark | — | — | — | — | — | — | 48 | 0.62 ± 0.15 | 30.8 | 6.1 | 81.1 | All | — |
Carcharhinus plumbeus | Sandbar shark | 13 | 0.12 ± 0.05 | 8.4 | 54.9 | 95.1 | Maui, Molokai, Oahu | 7 | 0.09 ± 0.03 | 9.0 | 55.8 | 93.3 | FFS, LIS, PHR | 0.75 |
Triaenodon obesus | Whitetip reef shark | — | — | — | — | — | — | 26 | 0.14 ± 0.05 | 25.6 | 5.8 | 61.6 | All | — |
Other species | ||||||||||||||
Galeocerdo cuvier | Tiger shark | 5 | 0.05 ± 0.02 | 4.7 | 4.6 | 55.8 | Maui, Molokai, Oahu | 1 | 0.01 ± 0.01 | 1.3 | 86.6 | — | PHR | 0.20 |
Carcharhinus amblyrhynchos | Grey reef shark | 2 | 0.02 ± 0.01 | 1.9 | 24.1 | 68.3 | Maui, Oahu | 1 | 0.01 ± 0.01 | 1.3 | 73.2 | — | FFS | 0.50 |
Carcharhinus melanopterus | Blacktip reef shark | 1 | 0.01 ± 0.01 | 0.9 | 14.9 | — | Lanai | — | — | — | — | — | — | — |
Unidentified shark | 1 | 0.01 ± 0.01 | 0.9 | 57.0 | — | Oahu | 2 | 0.03 ± 0.02 | 2.6 | 38.1 | 73.2 | FFS, LIS | 3.00 | |
Subtotal Other species | 9 | 0.08 ± 0.03 | 7.5 | 4.6 | 68.3 | 4 | 0.05 ± 0.03 | 3.8 | 38.1 | 73.2 | 0.63 | |||
Subtotal all sharks | 22 | 0.21 ± 0.05 | 15.9 | 4.6 | 95.1 | 85 | 1.09 ± 0.17 | 55.1 | 5.8 | 93.3 | 5.19 | |||
Total mobile predators | 198 | 1.85 ± 0.27 | 67.3 | 425 | 5.45 ± 0.84 | 85.1 | 2.95 |
% Drops indicate the percentage number of BRUVS deployments where a species or group is observed. FFS: French Frigate shoals, LIS: Lisianski, PHR: Pearl and Hermes Reef, MID: Midway. *Seriola sp. that could not be differentiated between Seriola dumerili and Seriola rivoliana. †pooled totals of Seriola dumerili, Seriola rivoliana, and unidentified Seriola sp.