Ecology of Poecilia obscura
Main Ref. Schories, S., M.K. Meyer and M. Schartl, 2009
Remarks P. obscura was collected from fast flowing small rivers and ditches with generally clear waters. The species also occurs in downstream habitats. Thus it inhabits both so-called low and high predation sites described in the guppy literature (see Magurran, 2005). The locus typicus is a site in the headwaters of the Oropuche River. The river is here about 5 meters wide and fast flowing with a maximum depth of 1 meter. The riverbed is gravel and sand with some larger rocks in the middle. Submerse plants are absent, but the vegetation on the river banks focally reaches into the water and provides shaded sections throughout most of the day. On the 13.2.2008 (1 p.m., air temperature 25.5°C) the following parameters were recorded: clear water, water temperature 22.5°C, hardness 5–10, conductivity 51 mS, pH 7, nitrate 0, nitrite 0. Accompanying fishes were Rivulus hartii, Astyanax spec., Ancistrus spec. and small cichlids. The inclusion of cichlids and characins defines the habitat as high predation site.

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 Poecilia obscura may be found.


Substrate Ref.
Special habitats
Special habitats Ref.


Associated with
Association remarks


Feeding type
Feeding type Ref.
Feeding habit
Feeding habit Ref.
Trophic Level(s)
Estimation method Original sample Unfished population Remark
Troph s.e. Troph s.e.
From diet composition
From individual food items
(e.g. 346)
(e.g. cnidaria)
Comments & Corrections
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