Overview

Comprehensive Description

Biology

Amphidromous freshwater species (Ref. 92840). Occur usually in fresh waters, but occasionally encountered in brackish waters of intermittent streams during dry seasons. Also found in flooded fields and marginal swamps along courses of streams and rivers.
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Distribution

Eastern Atlantic: St. Louis, Senegal to the Cunene River, Angola and from the islands of Gulf of Guinea. Reported from the East Coast drainage of Africa (Ref. 4967).
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Western Africa: Senegal to Angola.
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Physical Description

Morphology

Dorsal spines (total): 7; Dorsal soft rays (total): 10 - 11; Analspines: 1; Analsoft rays: 9 - 10
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Size

Maximum size: 264 mm TL
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Max. size

26.4 cm TL (male/unsexed; (Ref. 4343))
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Diagnostic Description

Upper jaw slightly hangs over lower jaw. Upper lip thick. Head broader than deep. Caudal fin rounded.
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Ecology

Habitat

Environment

demersal; amphidromous (Ref. 46888); freshwater; brackish; marine
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Depth range based on 19 specimens in 1 taxon.
Water temperature and chemistry ranges based on 19 samples.

Environmental ranges
  Depth range (m): 0.065 - 7.6
  Temperature range (°C): 26.890 - 27.075
  Nitrate (umol/L): 0.395 - 0.448
  Salinity (PPS): 33.056 - 33.581
  Oxygen (ml/l): 4.652 - 4.679
  Phosphate (umol/l): 0.149 - 0.176
  Silicate (umol/l): 1.821 - 3.414

Graphical representation

Depth range (m): 0.065 - 7.6

Temperature range (°C): 26.890 - 27.075

Nitrate (umol/L): 0.395 - 0.448

Salinity (PPS): 33.056 - 33.581

Oxygen (ml/l): 4.652 - 4.679

Phosphate (umol/l): 0.149 - 0.176

Silicate (umol/l): 1.821 - 3.414
 
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Migration

Amphidromous. Refers to fishes that regularly migrate between freshwater and the sea (in both directions), but not for the purpose of breeding, as in anadromous and catadromous species. Sub-division of diadromous. Migrations should be cyclical and predictable and cover more than 100 km.Characteristic elements in amphidromy are: reproduction in fresh water, passage to sea by newly hatched larvae, a period of feeding and growing at sea usually a few months long, return to fresh water of well-grown juveniles, a further period of feeding and growing in fresh water, followed by reproduction there (Ref. 82692).
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Trophic Strategy

Occurs usually in freshwaters, but occasionally encountered in brackish waters of intermittent streams during dry seasons. Also found in flooded fields and marginal swamps along courses of streams and rivers.
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Conservation

Threats

Not Evaluated
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Wikipedia

Awaous lateristriga

Awaous lateristriga, the West African freshwater goby, is a species of goby found in marine, fresh and brackish waters (though mostly in freshwaters) along the Atlantic coast of Africa from Senegal to the Cunene River, Angola and also from islands in the Gulf of Guinea. This species can reach a length of 26.4 centimetres (10.4 in) TL.[1]

References[edit]

  1. ^ Froese, Rainer and Pauly, Daniel, eds. (2013). "Awaous lateristriga" in FishBase. April 2013 version.
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