Brienomyrus brachyistius (Gill, 1862)

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

Classification	Actinopterygii \| Osteoglossiformes \| Mormyridae
Synonyms	Marcusenius brachyistius, Mormyrus brachyistius, Mormyrus liberiensis, ... more
Common names	短鳍异吻象鼻鱼, 壮象鼻鱼, Ruskonuijakala, ... more

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Main reference

Bigorne, R. 1990. (Ref. 2915)
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Size / Weight / Age

Max length : 12.4 cm SL male/unsexed; (Ref. 2915)

Environment

Benthopelagic; freshwater; brackish

Climate / Range

Tropical; 25°C - 28°C (Ref. 2060)

Africa: Gambia to Democratic Republic of the Congo. May also be present in the upper reaches of Senegal (Niokolo-Koba National Park) (Ref. 2915).
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Dorsal spines (total): 0; Dorsal soft rays (total): 14 - 19; Anal spines: 0; Anal soft rays: 25 - 31. Dorsal base 0.41-0.68 x anal fin base. Pectorals as long as head, posterior end does not extend origin of pelvic fins. Caudal peduncle thin, height 14.4-22.9x of SL. Dark grey-black or brown coloration.

Affinities: Brienomyrus longianalis. Occurs in most coastal basins in West Africa (Ref. 2703). Within this species complex, four distinct waveforms of electric organ discharge (EOD) were noted in the Gabon (Ivindo River) populations, probably pointing to separate species (Ref. 10460). Exhibits sexual dimorphism in its EOD waveform and duration (Ref. 10011; 10764 ). EOD has a constant waveform and variable sequence of pulse intervals (SPI) (Ref. 55567).


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

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More information
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Internet sources

Estimation of some characteristics with mathematical models

Resilience (Ref. 69278)

Medium, minimum population doubling time 1.4 - 4.4 years (Assuming Fec < 5,000)


Vulnerability (Ref. 59153)	Price category (Ref. 80766)
Low vulnerability (15 of 100)	Not marketed/unknown

Entered by Cruz, Tess

Modified by Luna, Susan M.

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Page last modified by : elaxamana, 15 July 2009

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