| Main Ref. | SAUP Database, 2006 | 
|---|---|
| Remarks | Surface diving; dabbling; coastal. Diet: Crabs (mainly Hemigrapsus nudus, Pagurus spp.), gastropods, polychaetes, amphipods, chitons, Mytilus edulis, limpets, barnacles, Clupea pallasi (eggs) and algae (Ref. 3985). | 
| Marine - Neritic | Marine - Oceanic | Brackishwater | Freshwater | |
|---|---|---|---|---|
| Marine zones / Brackish and freshwater bodies | 
 | 
 | 
 | 
 | 
| Substrate | |
|---|---|
| Substrate Ref. | |
| Special habitats | |
| Special habitats Ref. | 
| Ref. | |
|---|---|
| Associations | |
| Associated with | |
| Association remarks | |
| Parasitism | 
| Feeding type | |
|---|---|
| Feeding type Ref. | |
| Feeding habit | |
| Feeding habit Ref. | 
| Estimation method | original sample | unfished population | Remark | ||
|---|---|---|---|---|---|
| Troph | s.e. | Troph | s.e. | ||
| From diet composition | |||||
| From individual food items | 3.58 | 0.48 | Trophic level estimated from a number of food items using a randomized resampling routine. | ||
| Ref. | |||||