| Rif. principale. | Schwalme, K., 1992 |
|---|---|
| Osservazioni | Occurs in clear vegetated lakes, quiet pools and backwaters of creeks and small to large rivers (Ref. 5723, 10294). Usually solitary and highly territorial. Enters brackish water in the Baltic. Adult feeds mainly on fishes, but at times feeds heavily on frogs and crayfish (Ref. 27547). Cannibalistic as juveniles (Ref. 30578). Eggs and young are preyed upon by fishes, aquatic insect larvae, birds, and aquatic mammals (Ref. 1998). Does not generally undertake long migrations, but a few may move considerable distances (Ref. 27547). |
| Marine - Neritic | Marine - Oceanic | Brackishwater | Freshwater | |
|---|---|---|---|---|
| Marine zones / Brackish and freshwater bodies |
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| Substrato | |
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| Substrato Rif. | |
| Habitat speciali | |
| Habitat speciali Rif. |
| Fonte Biblio. | |
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| Associazioni | |
| Associato a | |
| Osservazioni dell'associazione | |
| Parassitismo |
| Tipo di alimentazione | mainly animals (troph. 2.8 and up) |
|---|---|
| Tipo di alimentazione Rif. | Schwalme, K., 1992 |
| Abitudini alimentari | hunting macrofauna (predator) |
| Abitudini alimentari Rif. | Schwalme, K., 1992 |
| Estimation method | Campione originale | Popolazione non pescata | Commento | ||
|---|---|---|---|---|---|
| Troph | s.e. | Troph | s.e. | ||
| Dalla composizione della dieta | 4.07 | 0.41 | 4.45 | 0.74 | Troph of adults from 2 studies. |
| Da singoli alimenti | 4.47 | 1.07 | Trophic level estimated from a number of food items using a randomized resampling routine. | ||
| Fonte Biblio. | Schwalme, K., 1992 | ||||