Nannocharax usongo Dunz & Schliewen, 2009

Catalog of Fishes (gen., sp.) | ITIS | CoL

Classification	Actinopterygii \| Characiformes \| Distichodontidae
Synonyms	... more
Common names	... more

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Main reference

Dunz, A.R. and U.K. Schliewen. 2009. (Ref. 80507)
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Size / Weight / Age

Max length : 4.4 cm SL male/unsexed; (Ref. 80507)

Environment

Benthopelagic; freshwater

Climate / Range

Tropical; 5°N - 6°N, 6°E - 10°E

Africa: Cameroon, Nigeria (Ref. 80507).
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Short description

Dorsal soft rays (total): 10 - 14; Anal soft rays: 10 - 12. Nannocharax usongo is distinguished from all other described Nannocharax species by its very small distance between the posterior border of the anus and the articulation of first anal-fin ray (0.9–1.9 vs. 2.2–14.2% of SL), its body coloration, which consist of 7–11 mostly big blotches along the lateral line often coalesced to one wide black band, and 7–12 small blotches along the dorsum (Ref. 80507).

All examined samples were collected in the Cross River basin, riffles in outlet of the Badi River into the Cross River and the Cross River at Mamfé in Cameroon at a distance of less than one mile north of outlet of the Badi River. One additional albeit slighty aberrant specimen was collected in the Sombreiro River at Ihuaba, Niger River delta Nigeria (Ref. 80507).


IUCN Red List Status (Ref. 57073)	Threat to humans
Not Evaluated	Harmless

Human uses
Fisheries:


More information
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Internet sources

Estimation of some characteristics with mathematical models

Resilience (Ref. 69278)

High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)


Vulnerability (Ref. 59153)	Price category (Ref. 80766)
Low vulnerability (10 of 100)

Entered by Busson, Frédéric

Modified by Bailly, Nicolas

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Page last modified by : elaxamana, 15 July 2009

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