Main Ref. | Ruiz, V.H. and T.M. Berra, 1994 |
---|---|
Remarks | Exhibits a gradient of abundance from low numbers in rithral/transitional habitats in headwater areas to higher numbers in potamal areas in the middle-lower reaches in rivers. Bentho-pelagic ?sh inhabiting shallow (<1 m) and slow waters of lakes (Laja, Icalma and Galletue´ ) and rivers. They occur over boulders or a mixed substrate of boulders, gravel and sand patches. Feeds mainly on chironomid larvae and other aquatic insects (may?ies, caddis?ies) and small mollusks (Ref. 58887). |
Marine - Neritic | Marine - Oceanic | Brackishwater | Freshwater | |
---|---|---|---|---|
Marine zones / Brackish and freshwater bodies |
|
|
|
|
Substrate | : sand; Hard Bottom: rocky; |
---|---|
Substrate Ref. | |
Special habitats | |
Special habitats Ref. |
Ref. | |
---|---|
Associations | |
Associated with | |
Association remarks | |
Parasitism |
Feeding type | mainly animals (troph. 2.8 and up) |
---|---|
Feeding type Ref. | Habit, E. and M.C. Belk, 2007 |
Feeding habit | hunting macrofauna (predator) |
Feeding habit Ref. | Habit, E. and M.C. Belk, 2007 |
Estimation method | Original sample | Unfished population | Remark | ||
---|---|---|---|---|---|
Troph | s.e. | Troph | s.e. | ||
From diet composition | |||||
From individual food items | 3.30 | 0.43 | Trophic level estimated from a number of food items using a randomized resampling routine. | ||
Ref. |