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> Characiformes (Characins) > Alestidae (African tetras)
Eponymy: Colonel Sir James Hayes Sadler (1827–1910) was a British Army officer who served in a number of artillery regiments (1854–1882). [...] (Ref. 128868), visit book page.
More on author: Boulenger.

Environment: milieu / climate zone / depth range / distribution range Ecologie

; zoet water pelagisch. Tropical

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Africa: Lakes Victoria, Kyoga and Nabugabo; Victoria Nile, Malawa River (Ref. 4903, 34290) and Middle Akagera (Ref. 46152). Also reported from Aswa River (Ref. 4903), Lake Rukwa basin (Ref. 27292) and Malagarazi River (Ref. 54847, 98755).

Grootte / Gewicht / Leeftijd

Maturity: L_m ? range ? - ? cm
Max length : 13.8 cm TL mannelijk / geslacht onbekend; (Ref. 27292)

Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie

Dorsale stekels (totaal) : 0; Dorsale zachte stralen (totaal) : 10; Anale stekels: 0; Anale zachte stralen: 20 - 21. Anal fin margin of females straight or very slightly concave; markedly convex in males (individual rays are stouter and coarser than those of females). Silver, bluish to black dorsally; silver longitudinal band running from behind the operculum to the caudal peduncle, where it merges with an irregular black blotch which extends to the caudal fin base. All fins grey in color; other specimens all yellowish (except for pectorals). Dorsal adipose fin bright orange (Ref. 34290).

In Lake Victoria found in shallow inshore areas with papyrus and other aquatic vegetation (Ref. 34290). In Lakes Kyoga and Nabugabo amongst marginal vegetation; believed to run up rivers during rainy season to spawn (Ref. 4903). Present in lake and affluents in the Lake Rukwa basin (Ref. 27292). Feeds on aquatic plants and surface insects (chironomid pupae), rarely on fishes (Ref. 12526). Appears in small quantities in markets (Ref. 4967).

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Seegers, L., 1996. The fishes of the Lake Rukwa drainage. Ann. Mus. R. Afr. Centr., Sci. Zool., 278:1-407. (Ref. 27292)

Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2024-1)

Niet bedreigd (LC) ; Date assessed: 24 September 2015

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

Harmless

Gebruik door de mens

Visserij: van minder commercieel belang

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Estimates based on models

Fylogenetische diversiteitsindex (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01122 (0.00496 - 0.02540), b=3.01 (2.83 - 3.19), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245).

Trofisch niveau (Ref. 69278): 3.2 ±0.40 se; based on food items.

Generation time: 2.4 ( na - na) years. Estimated as median ln(3)/K based on 1 growth studies.

Weerstandsvermogen (Ref. 120179): Hoog, minimale populatieverdubbelingstijd minder dan 15 maanden (K=4.6).

Fishing Vulnerability (Ref. 59153): Low to moderate vulnerability (27 of 100).

Prijsklasse (Ref. 80766): Unknown.

Brachyalestes sadleri (Boulenger, 1906)