Classification / Names
Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa
Teleostei (teleosts) > Cypriniformes
(Carps) > Danionidae
(Danios) > Chedrinae
Etymology: marqueti: The species name, marqueti, is in honour of Jean-Pierre Marquet, former technical assistant of the Belgian Technical Cooperation project 'PRODEPAAK', in recognition of his remarkable efforts in fish collecting and who provided logistic support for the Katanga Expedition 2012 which resulted in the discovery of this new species (Ref. 122357).
Environment: milieu / climate zone / depth range / distribution range
Freshwater; benthopelagic; pH range: 7.0 - 8.4; depth range 1 - 2 m (Ref. 122357). Tropical; 18°C - 28°C (Ref. 122357)
Africa: right bank tributaries of Upper Congo River and affluents of Lake Tanganyika in Democratic Republic of the Congo, Burundi and Tanzania (Ref. 122357).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 19.7 cm SL male/unsexed; (Ref. 122357)
Morphology | Morphometrics
soft rays: 16 - 17;
Vertebrae: 40 - 41. Diagnosis: Within the Congo basin, Raiamas marqueti can be distinguished from R. batesii, R. kheeli and R. moorii by a lower number of lateral line scales, 45-48 vs. 68-70, 65-68 and 54-61 respectively; from R. longirostris by a greater head width, 37-45% of head length vs. 31%, and a deeper body, 18.8-23.3% of standard length vs. 16.5%; from R. buchholzi and R. christyi by the absence of a large dark spot at the base of the caudal fin vs. presence, a longer dorsal-fin base, 12.5-14.0% of standard length vs. 10.1-12.0% and 10.4-11.6% respectively, and a shallower head depth, 49.5-55.9% of standard length vs. 56.5-61.8% (Ref. 122357). Furthermore, it is distinguished from the phenotypically similar species R. intermedius and R. brachyrhabdotos by a shallower body, 18.8-23.3% of standard length vs. 25.2-28.8% and 23.6-29.8% respectively, and a more or less horizontal predorsal profile vs. convex predorsal profile; and from R. salmolucius by a shorter head, 27.0-30.1% of standard length vs. 30.2-33.6%, and the short distance between nostril and eye, 6-7% of head length vs. 5-6%, overlap due to negative allometry, and the narrower width of the first two bars posterior to the pectoral fin covering only 1.5-2.0 lateral line scales vs. wide bars covering 2.5-3.0 lateral line scales (Ref. 122357). Outside the Congo basin, Raiamas marqueti is distinguished from all other species, except R. ansorgii, R. nigeriensis and R. senegalensis, by a intermediate high number of lateral line scales, 45-48 vs. 36-38 in R. levequei, 58-63 in R. scarciensis and 39-42 in R. steindachneri; from R. ansorgii by the insertion of the dorsal fin slightly behind the pelvic-fin insertion, about three or four lateral line scales between the verticals through the anterior base of the dorsal fin and the pelvic-fin insertion vs. six or seven scales; from R. nigeriensis by a longer head, 27.0-30.1% of standard length vs. 18.6-25.0%, and a shorter eye diameter, 20-26% of head length vs. 29-36%; and from R. senegalensis by a higher number of branched dorsal-fin rays, 9 vs. 8 (Ref. 122357).
Found in rapids, but also rivers with sandy substrate (Ref. 122357).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Katemo Manda, B., J. Snoeks, A. Chocha Manda and E. Vreven, 2018. Hidden species diversity in Raiamas salmolucius (Teleostei: Cyprinidae) from the Congo basin: two new species based on morphometric evidence. Ichthyol. Explor. Freshwat. 28(4):345-363. (Ref. 122357)
IUCN Red List Status (Ref. 126983)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82804
= No PD50 data [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.4 ±0.4 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153
): Low vulnerability (14 of 100).