主要參考文獻 | Schwalme, K., 1992 |
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附註 | 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 | |
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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. |
參考文獻 | |
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Associations | |
Associated with | |
Association remarks | |
Parasitism |
攝取食物的類型 | mainly animals (troph. 2.8 and up) |
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Feeding type Ref. | Schwalme, K., 1992 |
攝取食物的習慣 | hunting macrofauna (predator) |
Feeding habit Ref. | Schwalme, K., 1992 |
Estimation method | 最初的樣本 | 不捕獲族群 | 附註 | ||
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Troph | s.e. | Troph | s.e. | ||
從食物內容 | 4.07 | 0.41 | 4.45 | 0.74 | Troph of adults from 2 studies. |
從個別的食物項目 | 4.47 | 1.07 | Trophic level estimated from a number of food items using a randomized resampling routine. | ||
參考文獻 | Schwalme, K., 1992 |