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Ecology of Serrasalmus rhombeus
 
Main Ref. Goulding, M., 1980
Remarks Forms schools. Mainly diurnal (Ref. 9096). Occurs in the rapids but is also captured in deep zones of main rivers with the use of fish bait. Is essentially a carnivore, feeds on small fish, crabs, mammals, lizards and coleopteran insects. Its opportunistic behavior allows it to adapt to various biotopes (Ref. 12225). It is timid and not aggressive but it possesses powerful dentition that can cause serious bites, and is therefore, potentially dangerous.

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
  • estuaries/lagoons/brackish seas
  • mangroves
  • marshes/swamps
  • rivers/streams
  • lakes/ponds
  • caves
  • exclusively in caves
Highighted items on the list are where Serrasalmus rhombeus may be found.

Habitat

Substrate
Substrate Ref.
Special habitats
Special habitats Ref.

Associations

Ref.
Associations
Associated with
Association remarks
Parasitism

Feeding

Feeding type mainly animals (troph. 2.8 and up)
Feeding type Ref. Goulding, M., 1980
Feeding habit hunting macrofauna (predator)
Feeding habit Ref. Goulding, M., 1980
Trophic Level(s)
Estimation method Original sample Unfished population Remark
Troph s.e. Troph s.e.
From diet composition 4.03 0.44 3.89 0.57 Troph of juv./adults from 2 studies.
From individual food items 3.57 0.59 Trophic level estimated from a number of food items using a randomized resampling routine.
Ref. Goulding, M., 1980
(e.g. 346)
(e.g. cnidaria)
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