Actinopterygii (ray-finned fishes) > Characiformes
(Characins) > Alestidae
Etymology: Brycinus: Greek, ebrykon, brykomai = to bite, to gnaw (Ref. 45335).
Environment / Climate / Range
Freshwater; pelagic. Tropical, preferred ?
Africa: endemic to Lake Turkana (Ref. 53378, 52331).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 3.3 cm SL male/unsexed; (Ref. 53378)
Morphology | Morphometrics
It has a shorter snout compared to Alestes nurse, a slightly larger eye and narrower interorbital space (Ref. 53378). The mouth of this species is noticeably superior and subterminal, with a predominance of unicuspid outer maxillary teeth (Ref. 53378).
A pelagic species, usually occurring with A. ferox, widespread throughout the open waters of Lake Turkana; situated in midwater scattering layer during daylight hours; disperses through surface waters after dark; feeds chiefly on zooplankton with occasional small insects; spawns within the lake; matures at exceptionally small size for an Alestes (Ref. 53378).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Hopson, A.J. and J. Hopson, 1982. The fishes of Lake Turkana with a description of three new species: Alestes ferox sp. nov., Alestes minutus sp. nov. (Pisces: Characidae) and Barbus turkanae sp. nov. (Pisces: Cyprinidae). p. 283-347. In A.J. Hopson (ed.) Lake Turkana. A report on the findings of the Lake Turkana project 1972-1975. Overseas Development Administration, London. 1873 p. (Ref. 53378)
IUCN Red List Status (Ref. 109396)
CITES (Ref. 94142)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01230 (0.00544 - 0.02785), b=3.00 (2.82 - 3.18), based on LWR estimates for this Genus-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.1 ±0.4 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .