Ecologia de Deuterodon heterostomus
 
Ref. principal Sazima, I., 1983
Notas Inhabits streams and rivers with sandy to muddy bottom. Forages during the day mingling with schools of similarly sized and looking prey types, such as tetras of the genus Astyanax, and feeds on their scales. The resemblance of this scale-eater with its habitual prey is an example of aggressive mimicry (Ref. 40388). The fish follows closely the intended prey by placing itself obliquely to its rear; strikes at prey's flank with its mouth widely open, the scales being removed during a quick bite. Removed scales are swallowed immediately and the predator resumes schooling with its prey. The fourth dentary teeth, the most important one for scale removal, is already differentiated in juveniles at 1.9 SL. The scale-eating habit may have a primarily social origin through inter-specific aggression. Besides scales, it occasionally takes insects, tiny crustaceans and plant material (Ref. 28733).

Aquatic zones / Water bodies

Marine - Neritic Marine - Oceanic Brackishwater Freshwater
Marine zones / Brackish and freshwater bodies
  • supra-littoral zone
  • littoral zone
  • sublittoral zone
  • epipelagic
  • mesopelagic
  • epipelagic
  • abyssopelagic
  • hadopelagic
  • Estuários/lagunas/áreas estuarinas
  • mangroves
  • marshes/swamps
  • rivers/streams
  • lakes/ponds
  • Grutas
  • exclusivamente
Highighted items on the list are where Deuterodon heterostomus may be found.

Habitat

Substrate
Substrate Ref.
Special habitats
Special habitats Ref.

Associations

Ref.
Associations
Associated with
Association remarks
Parasitism

Alimentação

Tipo de alimentação mainly animals (troph. 2.8 and up)
Feeding type Ref.
Hábito alimentar
Feeding habit Ref.
Trophic Level(s)
Estimation method Amostra original População virgem (não pescada) Nota
Troph s.e. Troph s.e.
Da composição da dieta
Dos itens alimentares individuais 3.24 0.49 Trophic level estimated from a number of food items using a randomized resampling routine.
Ref.
(ex. 346)
(ex. oophagy)
Voltar à procura
Comments & Corrections
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