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Brienomyrus brachyistius in Gambia

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Brienomyrus brachyistius   (Gill, 1862)
Family:	Mormyridae (Elephantfishes)			picture (Brbra_u4.jpg) by RMCA
Order:	Osteoglossiformes  (bony tongues)
Class:	Actinopterygii (ray-finned fishes)
FishBase name:
Max. size:	12.4 cm SL (male/unsexed; Ref. 2915)
Environment:	benthopelagic
Climate:	tropical; 25 - 28°C
Global Importance:
Resilience:	Medium, minimum population doubling time 1.4 - 4.4 years (Assuming Fec < 5,000)
Distribution:	Africa: Gambia to Democratic Republic of the Congo. May also be present in the upper reaches of Senegal (Niokolo-Koba National Park) (Ref. 2915).
Diagnosis:	Dorsal spines (total): 0-0; Dorsal soft rays (total): 14-19; Anal spines: 0-0; 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.
Biology:	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)
Threatened:	Not Evaluated, see IUCN Red List  , (Ref. 36508)
Dangerous:	harmless
Coordinator:
Main Ref:	Bigorne, R.. 1990. (Ref. 2915)
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Gambia country information
Common names:	[ No common name ]		Ref:
Status:	native		Ref:
Salinity:	freshwater
Uses:	no uses
Country Information:	www.cia.gov/cia/publications/factbook/geos/ga.html
Occurrences:	Occurrences    Point map
Main Ref:	Gosse, J.-P., 1984
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	Entered:  Sa-a, Pascualita

	Ref.:				Glossary
		(e.g. 9948)				(e.g. cephalopods)
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Page created by: Eli, 20.10.03, last modified by Eli, 26.06.07