Main Ref. | Coad, B., 1997 |
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Remarks | Occurs mainly in the open sea, occasionally approaching the shore and sometimes forming large schools. Rises to the surface in the spring months, but descending to as much as 78 m in late summer (apparently rising again in October-November, but descending once more in winter). Breeds intermittently from end of April to November, mainly in July, in the open sea. |
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. | Coad, B., 1997 |
Feeding habit | |
Feeding habit Ref. |
Estimation method | Original sample | Unfished population | Remark | ||
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Troph | s.e. | Troph | s.e. | ||
From diet composition | 3.01 | 0.08 | |||
From individual food items | 3.00 | 0.00 | Tentative trophic level derived from 1 + troph of a single food item | ||
Ref. | Badalov, F.G., 1972 |