Campylomormyrus alces [(Boulenger, 1920) ]

Campylomormyrus alces (Boulenger, 1920)

Campylomormyrus alces

Behaviour:

EOD unknown.

Look alikes:

Difficult to distinguish from C. elephas. From key published in Poll, Gosse, & Orts, 1982:

-C. elephas: SL 5.8-7.3x in snout length. Chin barbel not tapered, obtuse, equal of longer than eye (0.9-1.5x), generally inserted above the lower lip. Body depth 3.3-3.8x in postocular standard length. Snout angle 35°-61°

-C. alces: SL is 7-8.5x in snout length. Chin barbel is tapered and pointed, shorter, equal or a little longer than eye (0.7-1.3x), not inserted above the lower lip. Body depth 2.8-3.3x in postocular standard length. Snout angle 56°-71°.

Distribution:

Upper Congo Rapids from Boyoma Falls (Stanley Falls), Kisangani, D.R. Congo to Ubundu (ex-Ponthiereville). Also some records from Stanley Pool and Lower Congo at Matadi. Poll (1967) reports and illustrates this species (or something resembling it) from the rapids of the Luachimo River near Dundo, Angola. See occurrence records on FishBase.

Ecology:

Rheophilic species.

mar, 2014-09-02 08:46 -- John P. Sullivan

EOL Text

Habitat and Ecology:

Habitat and Ecology

This is a demersal species.

Systems

Freshwater

License	http://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/Author	International Union for Conservation of Nature and Natural Resources
Source	http://www.iucnredlist.org/apps/redlist/details/182360

Environment:

demersal; freshwater; pH range: 5.0

License	http://creativecommons.org/licenses/by-nc/3.0/
Rights holder/Author	Pascualita Sa-a, FishBase
Source	http://www.fishbase.org/summary/SpeciesSummary.php?id=10838

Ecology:

Rheophilic species.

License	http://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/Author	Sullivan, John P., Sullivan, John P., Africhthy
Source	http://mormyrids.lifedesks.org/pages/2037

Electric Organ Discharge:

EOD unknown.

License	http://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/Author	Sullivan, John P., Sullivan, John P., Africhthy
Source	http://mormyrids.lifedesks.org/pages/2037

IUCN Red List Assessment:

Red List Category

Least Concern

Red List Criteria

Version

3.1

Year Assessed

2010

Assessor/s

Moelants, T.

Reviewer/s

Brummett, R., Mbe Tawe, A.N., Dening Touokong, C., Reid, G.M., Snoeks, J. Staissny, M., Moelants, T., Mamonekene, V., Ndodet, B., Ifuta, S.N.B., Chilala, A., Monsembula, R., Ibala Zamba, A., Opoye Itoua, O., Pouomogne, V., Darwall, W. & Smith, K.

Contributor/s

Justification

The species is widespread or without major threats throughout the Central Africa assessment region and is assessed as Least Concern.

License	http://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/Author	International Union for Conservation of Nature and Natural Resources
Source	http://www.iucnredlist.org/apps/redlist/details/182360

Population:

Population

No information available.

Population Trend

Unknown

License	http://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/Author	International Union for Conservation of Nature and Natural Resources
Source	http://www.iucnredlist.org/apps/redlist/details/182360

Threats:

Major Threats

None known.

License	http://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/Author	International Union for Conservation of Nature and Natural Resources
Source	http://www.iucnredlist.org/apps/redlist/details/182360

Least Concern (LC)

License	http://creativecommons.org/licenses/by-nc/3.0/
Rights holder/Author	Pascualita Sa-a, FishBase
Source	http://www.fishbase.org/summary/SpeciesSummary.php?id=10838

General Description:

Taken from Boulenger (1920):

Depth of body 3 to 3½ times in the total length, length of head 5 or 6 times. Tubular snout short and highly compressed, directed downward almost perpendicular to the axis of the body; length of snout about 1 1/2 times that of the post-ocular head distance, its smallest vertical diameter 2½ to 3 times its length and approximately equal to the diameter of the eye; fleshy chin barbel tapers to a fine point, its length equal to the diameter of the eye or a little less; teeth small, truncated, 3 or 4 in the upper jaw, 4 on the bottom. Dorsal 31-34, beginning above the sixth to eighth ray of the anal, the length of its base equaling about two-thirds of its distance from the head. Anal 33-35, nearer the tail than the base of the ventral. Pectoral pointed, as long as the head, extending back beyond the ventral, measuring twice its length. Caudal fin scaly at the base, lobes long and pointed. Caudal peduncle 3 times as long as high, as long as head or slightly shorter. 70 to 75 scales along the lateral line, 16-18/16-18 in transverse series on the body, 14-15/12-13 between the dorsal and anal, 12 around caudal peduncle. Dark brown above, silvery white below; dorsal fin blackish in front, anterior margin extended into a yellow oblique band extending from its base in the lateral line; a black band on each lobe of the caudal fin. Total length from 255 to 330 millimeters. Differs from G. elephas [Campylomorymyrus elephas] by its much shorter snout.

License	http://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/Author	Sullivan, John P., Boulenger, G.A., Africhthy
Source	http://mormyrids.lifedesks.org/pages/2037

Conservation Actions:

Conservation Actions

None known.

License	http://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/Author	International Union for Conservation of Nature and Natural Resources
Source	http://www.iucnredlist.org/apps/redlist/details/182360

Mormyridae - African weakly electric fishes

Mintotom mi ne vé ?

Mormyridae

Campylomormyrus alces (Boulenger, 1920)

Onglets principaux