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Mormyridae - - Classification -
- Mormyridae
- Osteoglossiformes
- Teleostei
- Chordata
- Animalia
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Mormyrus longirostris Peters, 1852
Eastern bottlenose mormyrid
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Mormyrus longirostris
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Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa
Teleostei (teleosts) > Osteoglossiformes (Bony tongues) > Mormyridae (Elephantfishes)
Etymology: Mormyrus: Greek, mormyros = a fish (Sparus sp) (Ref. 45335).
More on author: Peters.
Etymology: Mormyrus: Greek, mormyros = a fish (Sparus sp) (Ref. 45335).
More on author: Peters.
Environment: milieu / climate zone / depth range / distribution range Ecology
Freshwater; demersal; potamodromous. Tropical; 11°S - 21°S
Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri
Africa: lower and middle Zambezi, Buzi, Pungwe (Ref. 52193), lower Sabi and Ludi Rivers (Ref. 42505), Luapula-Moero-Bangwelo (Zambian Congo system) (Ref. 42505, 52193). Also known from the Ruvuma and Rufiji rivers in Tanzania (Ref. 7248, 52193), lakes Malawi, Tanganyika (Ref. 4967, 52193) and Rukwa, and other eastward flowing rivers in Tanzania (Ref. 4967).
Length at first maturity / Size / Weight / Age
Maturity: Lm 34.0 range ? - ? cm
Max length : 75.0 cm SL male/unsexed; (Ref. 52193); max. published weight: 10.0 kg (Ref. 52193)
Max length : 75.0 cm SL male/unsexed; (Ref. 52193); max. published weight: 10.0 kg (Ref. 52193)
Short description Identification keys | Morphology | Morphometrics
Dorsal spines (total): 0; Dorsal soft rays (total): 65 - 75; Anal spines: 0; Anal soft rays: 17 - 19. Diagnosis: dorsal fin greater than twice the length of anal fin; dorsal origin nearer tip of snout than caudal fin base; snout 2-2.5 times in head length; caudal peduncle less than 4 times in standard length (Ref. 52193).
Found in caves and muddy areas, also hides among weeds (Ref. 13337). Favours quiet deep water with a soft muddy bottom (Ref. 52193). Forms shoals (Ref. 13337, 52193). Feeds on weeds (Ref. 5595) and insects but may also feed on small fishes (Ref. 5595, 52193) and fish eggs (Ref. 52193), blood worms (Ref. 13337), small crustaceans and mollusks (Ref. 13337, 52193). Active mainly at night; breeds during the rainy season, moving upstream in rivers after flood spates have receded (Ref. 52193). Migrations appears to occur at irregular interval as this fish is not a powerful swimmer and would not be able to cope with very high water current (Ref. 13337). Females carry 10,000-70,000 eggs; can give a mild shock when caught (Ref. 7248, 52193).
Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Main reference
Upload your references | References | Coordinator | Collaborators
Gosse, J.-P., 1984. Mormyridae. p. 63-122. In J. Daget, J.-P. Gosse and D.F.E. Thys van den Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). ORSTOM, Paris and MRAC, Tervuren. Vol. 1. (Ref. 3203)
CITES
Not Evaluated
Threat to humans
Other (Ref. 52193)
Human uses
Fisheries: commercial; gamefish: yes; aquarium: commercial
FAO - Publication: search | FishSource |
More information
Population dynamics
Growth parameters
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Recruitment
Abundance
Growth parameters
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Recruitment
Abundance
Life cycle
Reproduction
Maturity
Maturity/Gills rel.
Fecundity
Spawning
Spawning aggregations
Eggs
Egg development
Larvae
Larval dynamics
Reproduction
Maturity
Maturity/Gills rel.
Fecundity
Spawning
Spawning aggregations
Eggs
Egg development
Larvae
Larval dynamics
Anatomy
Gill area
Brain
Otolith
Gill area
Brain
Otolith
Physiology
Body composition
Nutrients
Oxygen consumption
Swimming type
Swimming speed
Visual pigments
Fish sound
Diseases & Parasites
Toxicity (LC50s)
Body composition
Nutrients
Oxygen consumption
Swimming type
Swimming speed
Visual pigments
Fish sound
Diseases & Parasites
Toxicity (LC50s)
Genetics
Genetics
Heterozygosity
Heritability
Genetics
Heterozygosity
Heritability
Tools
E-book | Field guide | Identification keys | Length-frequency wizard | Life-history tool | Point map | Classification Tree
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Special reports
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Internet sources
AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: genus, species | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: genome, nucleotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | Public aquariums | PubMed | Reef Life Survey | Socotra Atlas | Tree of Life | Wikipedia: Go, Search | World Records Freshwater Fishing | Zoobank | Zoological Record
Estimates based on models
Phylogenetic diversity index (Ref. 82804): PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01288 (0.00707 - 0.02348), b=2.88 (2.72 - 3.04), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).
Trophic level (Ref. 69278): 3.3 ±0.46 se; based on food items.
Generation time: 4.9 ( na - na) years. Estimated as median ln(3)/K based on 1 growth studies.
Resilience (Ref. 120179): Medium, minimum population doubling time 1.4 - 4.4 years (K=0.22).
Fishing Vulnerability (Ref. 59153): Moderate to high vulnerability (47 of 100).