Ecology of Astyanax rivularis
 
Main Ref. Casatti, L. and R.M.C. Castro, 1998
Distribution
Marine - Neritic
  • supra-littoral zone
  • littoral zone
  • sublittoral zone
Marine - Oceanic
  • epipelagic
  • mesopelagic
  • epipelagic
  • abyssopelagic
  • hadopelagic
Brackishwater
  • estuaries/lagoons/brackish seas
  • mangroves
  • marshes/swamps
Freshwater
  • rivers/streams
  • lakes/ponds
  • caves
  • exclusively in caves
Highighted items on the list are where Astyanax rivularis may be found.
Remarks Ratio of digestive tube length/standard length is 1.2. Collects food items from drifting current and sometimes trims submerged roots of Poaceae or algae attached to rocks. When collecting items carried by the current, the fish swims upstream orientated, either in the middle of the water column, or at the margins or downstream from rocks (Ref. 27701).

Substrate

Substrate
Substrate Ref.
Special habitats
Special habitats Ref.

Associations

Ref.
Associations
Associated with
Association remarks
Parasitism

Feeding

Feeding type plants/detritus+animals (troph. 2.2-2.79)
Feeding type ref Casatti, L. and R.M.C. Castro, 1998
Feeding habit
Feeding habit ref
Trophic level(s)
Original sample Unfished population Remark
Estimation method Troph s.e. Troph s.e.
From diet composition
Ref.
From individual food items 2.72 0.36 Trophic level estimated from a number of food items using a randomized resampling routine.
(e.g. 346)
(e.g. cnidaria)
Entered by Sa-a, Pascualita on 11.13.02
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