Table 1. Diet composition of bottlenose dolphins in the Gulf of Cadiz.
N = number of prey, %N = numerical percentage, O = occurrence, %O = percentage of occurrence, W = prey weight, %W = percentage of reconstructed weight, IRI = index of relative importance. 95% confidence limits are in parenthesis.
| N | %N | O | %O | W | %W | IRI | ||
|---|---|---|---|---|---|---|---|---|
| TELEOST | ||||||||
| BOTHIDAE | 1 | 0.10 [0–0.54] | 1 | 7.69 [0–23.08] | 142.01 | 0.10 [0–0.37] | 1.54 [0–21.00] | |
| CARANGIDAE | ||||||||
| Trachurus sp. | 10 | 1.00 [0–3.63] | 2 | 15.38 [0–38.46] | 422.50 | 0.29 [0–1.14] | 19.84 [0–183.45] | |
| CENTRACANTHIDAE | ||||||||
| Spicara maena | 2 | 0.20 [0–0.74] | 1 | 7.69 [0–23.08] | ||||
| CENTRISCIDAE | ||||||||
| Macroramphosus sp. | 176 | 17.58 [0–37.39] | 1 | 7.69[0–23.08] | ||||
| CEPOLIDAE | ||||||||
| Cepola macrophthalma | 256 | 25.57 [0–43.77] | 2 | 15.38 [0–38.46] | 7007.84 | 4.87 [0–16.47] | 468.17 [0–2316.83] | |
| CITHARIDAE | ||||||||
| Citharus linguatula | 2 | 0.20 [0–0.31] | 2 | 15.38 [0–38.46] | 74.24 | 0.05 [0–0.18] | 3.85 [0–18.85] | |
| CLUPEIDAE | ||||||||
| Sardina pilchardus | 17 | 1.70 [0–6.88] | 3 | 23.08 [0–46.15] | 1188.95 | 0.83 [0–4.13] | 58.39[0–508.11] | |
| CONGRIDAE | ||||||||
| Conger conger | 215 | 21.48 [9.11–47.02] | 8 | 61.54 [38.46–84.62] | 50603.24 | 35.18 [19.14–64.07] | 3486.86 [1086.49–9400.44] | |
| ENGRAULIDAE | ||||||||
| Engraulis encrasicoliis | 1 | 0.10 [0–0.28] | 1 | 7.69[0–23.08] | 176.45 | 0.12 [0–0.48] | 1.69 [0–17.54] | |
| GADIDAE | 24 | 2.34 [0.71–6.76] | 7 | 53.9 [15.38–69.23] | 249.04 | 0.17 [0.02–0.61] | 135.29 [11.23–510.23] | |
| Gadiculus argenteus | 9 | 0.90 [0–3.27] | 2 | 15.38 [0–38.46] | 47.93 | 0.03 [0–0.13] | 14.30 [0–130.76] | |
| Micromesistius poutassou | 4 | 0.40 [0–1.88] | 2 | 15.38 [0–38.46] | 15.05 | 0.01 [0–0.05] | 6.31 [0–74.23] | |
| Trisopterus sp. | 10 | 1.00 [0–2.36] | 2 | 15.38 [0–38.46] | 186.06 | 0.13 [0–0.46] | 17.38 [0–108.45] | |
| unidentified Gadidae | 1 | 0.10 [0–0.53] | 1 | 7.69 [0–23.08] | ||||
| GOBIIDAE | 11 | 1.10 [0–3.83] | 2 | 15.38 [0–38.46] | 10.06 | 0.01 [0–0.02] | 17.07 [0–148.07] | |
| HAEMULIDAE | ||||||||
| Plectorinchus mediterraneus | 1 | 0.10 [0–0.49] | 1 | 7.69 [0–23.08] | ||||
| MERLUCIIDAE | ||||||||
| Merluccius merluccius | 137 | 13.69 [3.13–35.67] | 5 | 38.46 [15.38–61.54] | 23768.36 | 16.52 [2.08–47.41] | 1161.88 [80.18–5112.74] | |
| MUGILIDAE | 32 | 3.1 [0.05–10.68] | 3 | 23.08 [0–46.15] | 50948.96 | 35.4 [0–64.15] | 888.58 [0–3453.40] | |
| Liza sp. | 31 | 3.10 [0–10.11] | 2 | 15.38 [0–38.46] | 50565.59 | 35.15 [0–64.24] | 588.29 [0–2859.50] | |
| Mugil sp. | 1 | 0.10 [0–0.53] | 1 | 7.69 [0–23.08] | 383.37 | 0.27 [0–1.36] | 2.85 [0–43.62] | |
| OPHIDIIDAE | ||||||||
| Ophidion barbatum | 1 | 0.10 [0–0.21] | 1 | 7.69 [0–23.08] | 32.04 | 0.02 [0–0.11] | 0.92 [0–7.39] | |
| SCIANIDAE | ||||||||
| Argyrosomus regius | 3 | 0.30 [0–1.12] | 2 | 15.38 [0–38.46] | ||||
| SCOMBRIDAE | ||||||||
| Scomber colias | 25 | 2.50 [0.17–8.39] | 4 | 30.77 [7.69–61.54] | 2998.07 | 2.08 [0.18–7.93] | 140.93 [2.69–1004.33] | |
| SEBASTIDAE | ||||||||
| Helicolenus dactylopterus | 2 | 0.20 [0–0.42] | 1 | 7.69 [0–23.08] | ||||
| SERRANIDAE | ||||||||
| Serranus hepatus | 8 | 0.80 [0–2.39] | 1 | 7.69 [0–23.08] | 395.57 | 0.28 [0–1.15] | 8.31 [0–81.70] | |
| SOLEIDAE | 3 | 0.3 [0–0.81] | 2 | 15.4 [0–38.46] | 744.77 | 0.52 [0–1.66] | 12.63 [0–94.99] | |
| Solea senegalensis | 1 | 0.10 [0–0.50] | 1 | 7.69 [0–23.08] | 274.58 | 0.19 [0–1.03] | 2.23 [0–35.31] | |
| Solea solea | 2 | 0.20 [0–0.63] | 1 | 7.69 [0–23.08] | 470.19 | 0.33 [0–1.35] | 4.08[0–45.70] | |
| SPARIDAE | 49 | 4.89 [1.47–16.92] | 9 | 69.23 [46.15–92.31] | 2133.01 | 1.48 [0.25–6.45] | 440.99 [79.38–2157.28] | |
| Boops boops | 4 | 0.40 [0–1.36] | 3 | 23.08 [0–46.15] | 280.64 | 0.20 [0–0.80] | 13.85 [0–99.68] | |
| Dentex maroccanus | 1 | 0.10 [0–0.30] | 1 | 7.69 [0–23.08] | ||||
| Dentex sp. | 6 | 0.60 [0–2.97] | 2 | 15.38 [0–38.46] | ||||
| Diplodus sp. | 1 | 0.10 [0–0.48] | 1 | 7.69 [0–23.08] | 52.07 | 0.04 [0–0.21] | 1.08 [0–15.93] | |
| Pagellus acarne | 13 | 1.30 [0–4.19] | 2 | 15.38 [0–38.46] | 915.65 | 0.64 [0–2.45] | 29.84 [0–255.37] | |
| Pagellus erythrinus | 17 | 1.70 [0–6.68] | 3 | 23.08 [0–46.15] | 884.65 | 0.62 [0–2.76] | 53.55 [0–435.66] | |
| Sparus aurata | 5 | 0.50 [0–2.03] | 2 | 15.38 [0–38.46] | ||||
| unidentified Sparidae | 2 | 0.20 [0–0.73] | 2 | 15.38 [0–38.46] | ||||
| TRICHIURIDAE | ||||||||
| Aphanopus carbo | 1 | 0.10 [0–0.43] | 1 | 7.69 [0–23.08] | ||||
| TRIGLIDAE | 1 | 1.10 [0–0.40] | 1 | 7.69 [0–20.07] | ||||
| UNIDENTIFIED FISH | 5 | 0.50 [0.11–1.20] | 4 | 30.77 [70.69–53.85] | ||||
| Total teleosts | 983 | 98.20 [95.33–99.34] | 13 | 100 [100–100] | 140929.18 | 97.97 [93.82–99.82] | 19617 [18915–19916] | |
| CEPHALOPODS | ||||||||
| LOLIGINIDAE | ||||||||
| Loligo vulgaris | 1 | 0.10 [0–0.56] | 1 | 7.69 [0–23.08] | ||||
| OCTOPODIDAE | 14 | 1.4 [0.30–3.94] | 4 | 30.8 [7.69–61.54] | 2913.03 | 2.03 [0.23–6.66] | ||
| Octupus vulgaris | 8 | 0.80 [0–3.33] | 3 | 23.08 [0–46.15] | 2467.46 | 1.72 [0–5.63] | 58.16 [0–413.50] | |
| Eledone cirrhosa | 6 | 0.60 [0–1.23] | 2 | 15.38 [0–38.46] | 445.57 | 0.31 [0–1.42] | 13.99 [0–101.92] | |
| Total cephalopods | 15 | 1.50 [0.37–4.50] | 5 | 38.46 [15.38–69.23] | 2913.03 | 2.03 [0.14–6.78] | 135.76 [7.84–780.91] | |
| CRUSTACEANS | ||||||||
| BRACHYURA | 2 | 0.20 [0–0.31] | 2 | 15.38 [0–38.46] | ||||
| ISOPODA | 1 | 0.10 [0–0.43] | 1 | 7.69 [0–23.08] | ||||
| Total crustaceans | 3 | 0.30 [0–0.55] | 3 | 23.08 [0–46.15] | ||||
| TOTAL | 1001 | 13 | 143842.21 |