Main Ref. | SAUP Database, 2006 |
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Remarks | Found on beach and shoreline (Ref. 116102). A coastal species (Ref. 356). Largely dependent on freshwater and terrestrial environments. Feeds mostly on non-fish vertebrate prey (Ref. 95711). Displays pursuit-diving behavior (Ref. 356). In the North Sea off the coasts of Scotland and northern England, is known to partially feed on the sand eel, Ammodytes marinus (Ref. 95711). |
Marine - Neritic | Marine - Oceanic | Brackishwater | Freshwater | |
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Marine zones / Brackish and freshwater bodies |
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Substrate | |
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Substrate Ref. | |
Special habitats | |
Special habitats Ref. |
Ref. | |
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Associations | |
Associated with | |
Association remarks | |
Parasitism |
Feeding type | mainly animals (troph. 2.8 and up) |
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Feeding type Ref. | Daunt, F., S. Wanless, P.R. Simon, H.J. Greenstreet, K.R. Hamer and M.P. Harris, 2008 |
Feeding habit | hunting macrofauna (predator) |
Feeding habit Ref. | Daunt, F., S. Wanless, P.R. Simon, H.J. Greenstreet, K.R. Hamer and M.P. Harris, 2008 |
Estimation method | original sample | unfished population | Remark | ||
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Troph | s.e. | Troph | s.e. | ||
From diet composition | 4.41 | 0.78 | Troph of juv./adults. | ||
From individual food items | 4.15 | 0.96 | Trophic level estimated from a number of food items using a randomized resampling routine. | ||
Ref. | Addis, P. and A. Cau, 1997 |