| Ref. principal | Nakamura, I. and N.V. Parin, 1993 |
|---|---|
| Notas | Generally over muddy bottoms of shallow coastal waters (Ref. 9351). Often enter estuaries (Ref. 9351). Adults and juveniles have opposing complementary vertical diurnal feeding migration. Juveniles and small adults form schools about 100 m above the bottom during daytime and form loose feeding aggregations at night-time near the surface where they prey on planktonic organisms such as euphausiids, small pelagic planktonic crustaceans and small fishes (anchovies, bregmacerotids, etc.). Large adults feed on pelagic prey (anchovies, sardines, myctophiids, bregmacerotids, carangoids, sphyraenids, atherinids, sciaenids, Scomber sp., Trichiurus sp., squid and crustaceans, etc.) near the surface during daytime and migrate to the bottom at night (Also Ref. 9773). One of the main predators during summer in a sandy beach at Canto Grande, Santa Catarina, Brazil (Ref. 55758). Benthopelagic. Dwells in shallow sandy estuaries to deeper waters. Shoaling species. Crepuscular feeding habit (Ref. 9773). Demersal (Ref. 137525). |
| Marine - Neritic | Marine - Oceanic | Brackishwater | Freshwater | |
|---|---|---|---|---|
| Marine zones / Brackish and freshwater bodies |
|
|
|
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| Substrato | Benthic: demersal; Pelagic; Soft Bottom: sand; mud; |
|---|---|
| Substrato Ref. | Martin, F.D. and J.W. Patus, 1984 |
| Special habitats | Coral Reefs; |
| Habitats especiais Ref. | Nguyen, N.T. and V.Q. Nguyen, 2006 |
| Ref. | |
|---|---|
| Associações | shoaling; |
| Associado a | |
| Observações da associação | |
| Parasitism |
| Tipo de alimentação | mainly animals (troph. 2.8 and up) |
|---|---|
| Tipo de alimentação Ref. | Nakamura, I. and N.V. Parin, 1993 |
| Hábito alimentar | hunting macrofauna (predator) |
| Hábito alimentar Ref. | Nakamura, I. and N.V. Parin, 1993 |
| Estimation method | Amostra original | População virgem (não pescada) | Nota | ||
|---|---|---|---|---|---|
| Troph | s.e. | Troph | s.e. | ||
| Da composição da dieta | 4.42 | 0.37 | 4.39 | 0.74 | Troph of adults from 4 studies. |
| Dos itens alimentares individuais | 4.34 | 0.97 | Trophic level estimated from a number of food items using a randomized resampling routine. | ||
| Ref. | Portsev, P.I., 1980 | ||||