Table 2.
Diet of common octopus (Octopus vulgaris) in the Portuguese coast, namely in Viana do Castelo (North region), Cascais (Centre region) and Tavira (South region). Occurrence index (OCI) of prey found in the octopods’ stomach contents (data from Rosa et al. [93]).
| Prey category | Occurrence index (OCI) | ||
|---|---|---|---|
| Viana | Cascais | Tavira | |
| ANNELIDA | 1.85 | 2.52 | - |
| POLYCHAETA unidentified | 1.85 | 2.52 | - |
| CRUSTACEA | 38.27 | 67.31 | 36.90 |
| ISOPODA unidentified | - | - | 0.18 |
| DECAPODA NATANTIA | 1.93 | 6.04 | 2.57 |
| Natantia unidentified | 1.93 | 3.43 | 2.57 |
| Caridae unidentified | - | 2.61 | - |
| DECAPODA REPTANTIA | 36.34 | 61.27 | 34.14 |
| ANOMURA | - | - | 0.33 |
| Paguridae unidentified | - | - | 0.26 |
| Pagurus prideauxi | - | - | 0.07 |
| BRACHYURA | 36.34 | 61.27 | 33.81 |
| Brachiura unidentified | 18.96 | 39.33 | 17.51 |
| Portunidae unidentified | 10.84 | 21.94 | 10.17 |
| Liocarcinus sp. | 5.17 | - | 5.03 |
| Polybius henzlow | 1.36 | - | 1.10 |
| MOLLUSCA | 7.13 | 14.89 | 23.52 |
| GASTROPODA unidentified | 1.49 | 1.87 | 0.61 |
| BIVALVIA | 1.75 | 7.43 | 16.56 |
| Carditidae unidentified | - | - | 1.07 |
| Cardiidae unidentified | - | - | 0.73 |
| Mytilus sp. | - | - | 1.72 |
| Venus sp. | - | - | 1.48 |
| Bivalvia unidentified | 1.75 | 7.43 | 11.56 |
| CEPHALOPODA | 3.90 | 5.59 | 6.35 |
| Sepiolidae unidentified | - | - | 1.39 |
| Sepia sp. | - | - | 0.73 |
| Illex coindetii | 0.71 | - | - |
| Octopus sp. | 0.18 | 0.83 | 0.36 |
| Cephalopoda unidentified | 3.01 | 4.75 | 3.87 |
| OSTEICHTHYA | 52.74 | 15.28 | 39.59 |
| Clupeidae unidentified | 16.70 | 3.29 | 12.94 |
| Gobidae unidentified | 5.80 | 4.53 | 1.43 |
| Osteichthya unidentified | 30.24 | 7.46 | 25.22 |