Nothobranchius ivanovae

Nothobranchius ivanovae Valdesalici, 2012

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> Cyprinodontiformes (Rivulines, killifishes and live bearers) > Nothobranchiidae (African rivulines)
Etymology: Nothobranchius: Greek, nothos = false + Greek, brangchia = gill (Ref. 45335)ivanovae: The species name is dedicated to the aquarist, collector, and discoverer of the species, Iva Ivanova from Dupnitsa, Bulgaria (Ref. 92886).
Eponymy: Iva Ivanova is a Bulgarian aquarist. She discovered and collected this species in western Tanzania. She has undertaken a number of collecting trips with Kiril Kardashev who has co-authored papers with the author. (Ref. 128868), visit book page.

Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet Ökologie

; süßwasser pelagisch. Tropical

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Africa: swampy area of Katuma River drainage in western Tanzania (Ref. 92886, 122068).

Größe / Gewicht / Alter

Geschlechtsreife: Lm ?  range ? - ? cm
Max length : 4.5 cm SL Männchen/unbestimmt; (Ref. 92886); 3.3 cm SL (female)

Kurzbeschreibung Bestimmungsschlüssel | Morphologie | Morphometrie

Rückenflossenstacheln (insgesamt) : 0; Rückenflossenweichstrahlen (insgesamt) : 17 - 18; Afterflossenstacheln: 0; Afterflossenweichstrahlen: 17 - 18; Wirbelzahl: 28. Diagnosis: Nothobranchius ivanovae males are similar to other members of the N. taeniopygus species group, differing from all other species of the genus by caudal and anal fin with a broad light sub-marginal band and dark margin (Ref. 92886). It differs from the similar and geographically closest N. taeniopygus from Ipati River by the following combination of characters: caudal fin red vs. pale brownish red, caudal fin with subdistal band vs. without band, anal fin with a creamy yellow broad submarginal band vs. thin white band; and from N. taeniopygus from Wogo River by the following combination of characters: blue-grey scales vs. light blue, caudal fin red vs. pale brownish grey, caudal fin with a subdistal and distal band vs. without band (Ref. 92886). In addition, N. ivanovae males have a relatively shorter head compared to N. taeniopygus "Ipati river", 29.5-34.6% of standard length vs. 33.0-37.5%; smaller eye, 22.8-29.0% of head length vs. 30.7-38.9%; more scales on lateral line, 31 vs. 28-30; and more dorsal and anal fin rays, 17-18 vs. 14-15 and 17-18 vs. 15-17 respectively (Ref. 92886). They have also a shorter head compared to N. taeniopygus "Wogo river", 29.5-34.6% of standard length vs. 33.6-35.4%; more scales on lateral line, 31 vs. 30; and more dorsal fin rays, 17-18 vs. 15 (Ref. 92886).
Body shape (shape guide): fusiform / normal.

Biologie     Fachlexikon (Englisch) (z.B. epibenthic)

Found in swampy area; described from a residual pool in the dry bed of the Karira stream (Ref. 92886).

Lebenszyklus und Paarungsverhalten Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fruchtbarkeit | Larven

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Valdesalici, S., 2012. Nothobranchius kardashevi and Nothobranchius ivanovae (Cyprinodontiformes: Nothobranchiidae): two new annual killifishes from the Katuma River drainage, western Tanzania. aqua, Int. J. Ichthyol. 18(4):191-198. (Ref. 92886)

IUCN Rote Liste Status (Ref. 130435: Version 2025-2 (Global))

  Verwundbar (VU) (B1ab(iii)+2ab(iii)); Date assessed: 09 December 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

  Harmless





Nutzung durch Menschen

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Schätzungen auf der Grundlage von Modellen

Phylogenetischer Diversitätsindex (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01096 (0.00461 - 0.02608), b=2.94 (2.74 - 3.14), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophische Ebene (Ref. 69278):  3.2   ±0.4 se; based on size and trophs of closest relatives
Anfälligkeit der Fischerei (Ref. 59153):  Low vulnerability (10 of 100). 🛈