Table 3. Quantitative prey composition of the broadbill swordfish (Xiphias gladius) in the CCLME.
A total of 292 stomachs containing food was examined. Prey items are shown in order of decreasing GII value. W = weight (g) for the given prey taxon, %W is the same value expressed as a percentage of the total weight summed across all prey taxa; N = number of prey individuals; F = frequency of occurrence (number of stomachs in which the prey taxon occurred); %F = frequency of occurrence expressed as a percentage of the number of (non-empty) stomachs examined; GII = geometric index of importance; IRI = index of relative importance; %PSIRI = percentage prey-specific IRI.
| Prey Taxon | W (g) | %W | N | %N | F | %F | GII | %GII | IRI | %IRI | %PSIRI |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jumbo squid, Dosidicus gigas | 131892.7 | 53.27 | 1061 | 20.23 | 173 | 59.25 | 76.64 | 44.25 | 4354.96 | 56.47 | 36.75 |
| Boreopacific gonate squid, Gonatopsis borealis | 19949.8 | 8.06 | 884 | 16.86 | 182 | 62.33 | 50.37 | 29.08 | 1552.94 | 20.14 | 12.46 |
| Abraliopsis sp. | 45.1 | 0.02 | 464 | 8.85 | 117 | 40.07 | 28.25 | 16.31 | 355.26 | 4.61 | 4.44 |
| Gonatus spp. | 181.6 | 0.07 | 299 | 5.7 | 110 | 37.67 | 25.08 | 14.48 | 217.56 | 2.82 | 2.89 |
| Market squid, Doryteuthis opalescens | 1447.6 | 0.58 | 538 | 10.26 | 88 | 30.14 | 23.66 | 13.66 | 326.81 | 4.24 | 5.42 |
| Pacific hake, Merluccius productus | 36360.1 | 14.69 | 331 | 6.31 | 49 | 16.78 | 21.81 | 12.59 | 352.37 | 4.57 | 10.50 |
| Duckbill barracudina, Magnisudis atlantica | 4568.6 | 1.85 | 218 | 4.16 | 84 | 28.77 | 20.07 | 11.59 | 172.67 | 2.24 | 3.01 |
| Unidentified Teleostei | 2316.9 | 0.94 | 119 | 2.27 | 65 | 22.26 | 14.7 | 8.49 | 71.35 | 0.93 | 1.61 |
| Chubby pearleye, Rosenblattichthys volucris | 810.6 | 0.33 | 166 | 3.17 | 49 | 16.78 | 11.71 | 6.76 | 58.61 | 0.76 | 1.75 |
| Jack mackerel, Trachurus symmetricus | 6668.2 | 2.69 | 72 | 1.37 | 28 | 9.59 | 7.88 | 4.55 | 38.99 | 0.51 | 2.03 |
| Nansenia spp. | 510.9 | 0.21 | 124 | 2.36 | 32 | 10.96 | 7.81 | 4.51 | 28.17 | 0.37 | 1.29 |
| Onychoteuthis borealijaponica | 656.6 | 0.27 | 60 | 1.14 | 35 | 11.99 | 7.73 | 4.47 | 16.89 | 0.22 | 0.71 |
| Slender barracudina, Lestidiops ringens | 330 | 0.13 | 92 | 1.75 | 29 | 9.93 | 6.82 | 3.94 | 18.75 | 0.24 | 0.94 |
| Pacific pomfret, Brama japonica | 5241.6 | 2.12 | 41 | 0.78 | 24 | 8.22 | 6.42 | 3.71 | 23.83 | 0.31 | 1.45 |
| Pacific sardine, Sardinops sagax | 1823.1 | 0.74 | 77 | 1.47 | 26 | 8.9 | 6.41 | 3.7 | 19.63 | 0.25 | 1.11 |
| Luvar, Luvarus imperialis | 19258.5 | 7.78 | 18 | 0.34 | 7 | 2.4 | 6.07 | 3.51 | 19.47 | 0.25 | 4.06 |
| Pacific saury, Cololabis saira | 1366.8 | 0.55 | 76 | 1.45 | 21 | 7.19 | 5.31 | 3.06 | 14.39 | 0.19 | 1.00 |
| Unidentified Scopelarchidae | 476.9 | 0.19 | 86 | 1.64 | 20 | 6.85 | 5.01 | 2.89 | 12.55 | 0.16 | 0.92 |
| Cock-eyed squid, Histioteuthis heteropsis | 1312.2 | 0.53 | 52 | 0.99 | 18 | 6.16 | 4.44 | 2.56 | 9.38 | 0.12 | 0.76 |
| Pacific mackerel, Scomber japonicus | 2180.7 | 0.88 | 66 | 1.26 | 16 | 5.48 | 4.4 | 2.54 | 11.72 | 0.15 | 1.07 |
| Sunbeam lampfish, Lampadena urophaos | 201.9 | 0.08 | 42 | 0.8 | 18 | 6.16 | 4.07 | 2.35 | 5.44 | 0.07 | 0.44 |
| King-of-the-salmon, Trachipterus altivelis | 5577.4 | 2.25 | 25 | 0.48 | 13 | 4.45 | 3.86 | 2.39 | 10.59 | 0.16 | 1.37 |
| Flowervase jewell squid, Histioteuthis dofleini | 560.1 | 0.23 | 25 | 0.48 | 15 | 5.14 | 3.37 | 1.95 | 3.61 | 0.05 | 0.36 |
| Unidentified Eucarida | 5.5 | <0.01 | 154 | 2.94 | 6 | 2.05 | 2.88 | 1.67 | 6.04 | 0.08 | 1.48 |
| Unidentified Teuthoidea | 202 | 0.08 | 15 | 0.29 | 12 | 4.11 | 2.58 | 1.49 | 1.51 | 0.02 | 0.19 |
| Spotted barracudina, Arctozenus risso | 67.9 | 0.03 | 14 | 0.27 | 8 | 2.74 | 1.75 | 1.01 | 0.81 | 0.01 | 0.15 |
| Histioteuthis spp. | 56.7 | 0.02 | 9 | 0.17 | 8 | 2.74 | 1.69 | 0.98 | 0.53 | 0.01 | 0.10 |
| Argonauta sp. | 13.1 | 0.01 | 8 | 0.15 | 8 | 2.74 | 1.67 | 0.97 | 0.43 | 0.01 | 0.08 |
| Striped mullet, Mugil cephalus | 1737.8 | 0.7 | 8 | 0.15 | 4 | 1.37 | 1.28 | 0.74 | 1.17 | 0.02 | 0.43 |
| Octopoteuthis sp. | 2.1 | <0.01 | 6 | 0.11 | 6 | 2.05 | 1.25 | 0.72 | 0.24 | <0.01 | 0.06 |
| Bigfin lampfish, Symbolophorus californiensis | 5.4 | <0.01 | 7 | 0.13 | 5 | 1.71 | 1.07 | 0.62 | 0.23 | <0.01 | 0.07 |
| Sharpchin barracudina, Stemonosudis macrura | 8.8 | <0.01 | 8 | 0.15 | 4 | 1.37 | 0.88 | 0.51 | 0.21 | <0.01 | 0.08 |
| Cranchia scabra | 4.5 | <0.01 | 5 | 0.1 | 4 | 1.37 | 0.85 | 0.49 | 0.13 | <0.01 | 0.06 |
| Mexican lampfish, Triphoturus mexicanus | <0.1 | <0.01 | 4 | 0.08 | 4 | 1.37 | 0.83 | 0.49 | 0.1 | <0.01 | 0.05 |
| Paralepididae, Barracudinas | 111.3 | 0.04 | 7 | 0.13 | 3 | 2.4 | 1.49 | 0.86 | 0.43 | 0.01 | 0.09 |
| Unidentified Euphausiidae | 3 | <0.01 | 6 | 0.11 | 3 | 2.05 | 1.25 | 0.72 | 0.24 | <0.01 | 0.06 |
| Robust clubhook squid, Onykia robusta | 43.3 | 0.02 | 4 | 0.08 | 3 | 1.37 | 0.85 | 0.49 | 0.13 | <0.01 | 0.05 |
| Northern anchovy, Engraulis mordax | 1.6 | <0.01 | 4 | 0.08 | 3 | 1.37 | 0.84 | 0.49 | 0.11 | <0.01 | 0.05 |
| California smoothtongue, Leuroglossus stilbius | <0.1 | <0.01 | 4 | 0.08 | 3 | 1.37 | 0.83 | 0.49 | 0.1 | <0.01 | 0.05 |
| Unidentified Tunicata | 3.5 | <0.01 | 3 | 0.06 | 3 | 1.03 | 0.63 | 0.37 | 0.06 | <0.01 | 0.04 |
| Smalleye squaretail, Tetragonurus cuvieri | 161.9 | 0.07 | 3 | 0.06 | 2 | 1.03 | 0.66 | 0.39 | 0.13 | <0.01 | 0.07 |
| Onychoteuthis sp. | <0.1 | <0.01 | 4 | 0.08 | 2 | 1.37 | 0.83 | 0.49 | 0.1 | <0.01 | 0.05 |
| Japetella sp. | <0.1 | <0.01 | 4 | 0.08 | 2 | 1.37 | 0.83 | 0.49 | 0.1 | <0.01 | 0.05 |
| Splitnose rockfish, Sebastes diploproa | 924.2 | 0.37 | 2 | 0.04 | 1 | 0.68 | 0.63 | 0.36 | 0.28 | <0.01 | 0.21 |
| Northern lampfish, Stenobrachius leucopsarus | <0.1 | <0.01 | 2 | 0.04 | 2 | 0.68 | 0.42 | 0.24 | 0.03 | <0.01 | 0.03 |
| Octopus rubescens | <0.1 | <0.01 | 2 | 0.04 | 2 | 0.68 | 0.42 | 0.24 | 0.03 | <0.01 | 0.03 |
| Chiroteuthis calyx | <0.1 | <0.01 | 2 | 0.04 | 2 | 0.68 | 0.42 | 0.24 | 0.03 | <0.01 | 0.03 |
| Albacore, Thunnus alalunga | 371.6 | 0.15 | 1 | 0.02 | 1 | 0.34 | 0.3 | 0.17 | 0.06 | <0.01 | 0.09 |
| Sebastes spp. | 3 | <0.01 | 8 | 0.15 | 1 | 2.74 | 1.67 | 0.97 | 0.42 | 0.01 | 0.08 |
| Halfmoon, Medialuna californiensis | 81 | 0.03 | 1 | 0.02 | 1 | 0.34 | 0.23 | 0.13 | 0.02 | <0.01 | 0.03 |
| Dogtooth lampfish, Ceratoscopelus townsendi | 1.5 | <0.01 | 2 | 0.04 | 1 | 0.68 | 0.42 | 0.24 | 0.03 | <0.01 | 0.03 |
| Shortbelly rockfish, Sebastes jordani | 0.4 | <0.01 | 2 | 0.04 | 1 | 0.68 | 0.42 | 0.24 | 0.03 | <0.01 | 0.03 |
| Leachia dislocata | <0.1 | <0.01 | 2 | 0.04 | 1 | 0.68 | 0.42 | 0.24 | 0.03 | <0.01 | 0.03 |
| Pacific bonito, Sarda chiliensis | 25.8 | 0.01 | 1 | 0.02 | 1 | 0.34 | 0.21 | 0.12 | 0.01 | <0.01 | 0.02 |
| Auxis sp. | 4.7 | <0.01 | 1 | 0.02 | 1 | 0.34 | 0.21 | 0.12 | 0.01 | <0.01 | 0.02 |
| Mastigoteuthis dentata | <0.1 | <0.01 | 1 | 0.02 | 1 | 0.34 | 0.21 | 0.12 | 0.01 | <0.01 | 0.02 |
| Octopus spp. | <0.1 | <0.01 | 1 | 0.02 | 1 | 0.34 | 0.21 | 0.12 | 0.01 | <0.01 | 0.02 |
| California flashlightfish, Protomyctophum crockeri | <0.1 | <0.01 | 1 | 0.02 | 1 | 0.34 | 0.21 | 0.12 | 0.01 | <0.01 | 0.02 |
| California headlightfish, Diaphus theta | <0.1 | <0.01 | 1 | 0.02 | 1 | 0.34 | 0.21 | 0.12 | 0.01 | <0.01 | 0.02 |
| Unidentified Isopoda | <0.1 | <0.01 | 1 | 0.02 | 1 | 0.34 | 0.21 | 0.12 | 0.01 | <0.01 | 0.02 |