Ecology Summary - Oreochromis macrochir

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Main Ref.	Trewavas, E., 1983
Remarks	Found in quiet waters along river margins and backwaters, in floodplain habitats and impoundments; juveniles live close inshore in shallow water (Ref. 7248, 52193). Inhabits the high plateau of the savanna, south of the rain forest; remains an inland species with no spread into coastal ecosystems; very low salinity tolerance (Ref. 2). Survives in ponds and dams (Ref. 4967). Frequency of occurence in Caprivi: frequently in sandy streams, abundant in standing deep water, common in shallow swamps, and occasionally in shallow flood plains (Ref. 37065).

Main Ref.

Trewavas, E., 1983

Remarks

Found in quiet waters along river margins and backwaters, in floodplain habitats and impoundments; juveniles live close inshore in shallow water (Ref. 7248, 52193). Inhabits the high plateau of the savanna, south of the rain forest; remains an inland species with no spread into coastal ecosystems; very low salinity tolerance (Ref. 2). Survives in ponds and dams (Ref. 4967). Frequency of occurence in Caprivi: frequently in sandy streams, abundant in standing deep water, common in shallow swamps, and occasionally in shallow flood plains (Ref. 37065).

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 Oreochromis macrochir may be found.

Habitat

Substrate
Substrate Ref.
Special habitats
Special habitats Ref.	Halwart, M. and M.V. Gupta, 2004

Associations

Ref.
Associations
Associated with
Association remarks
Parasitism

Feeding

Feeding type	mainly plants/detritus (troph. 2-2.19)
Feeding type Ref.	Trewavas, E., 1983
Feeding habit	filtering plankton
Feeding habit Ref.	Trewavas, E., 1983

Trophic Level(s)

Estimation method	Original sample		Unfished population		Remark
Estimation method	Troph	s.e.	Troph	s.e.	Remark
From diet composition	2.05				Troph of adults from 1 study.
From individual food items	2.21	0.11			Trophic level estimated from a number of food items using a randomized resampling routine.
Ref.

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