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Nothobranchius oestergaardi  Valdesalici & Amato, 2011

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Nothobranchius oestergaardi
Male picture by Valdesalici, S.

Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Cyprinodontiformes (Rivulines, killifishes and live bearers) > Nothobranchiidae (African rivulines)
Etymology: Nothobranchius: Greek, nothos = false + Greek, brangchia = gill (Ref. 45335);  oestergaardi: The species name is dedicated to the collector and friend Kaj Østergaard, Denmark, for his contributions over a long period of time on field investigations that have led to the discovery of many new populations of Nothobranchius species in numerous countries (Ref. 86819).

Environment / Climate / Range Ecology

Freshwater; demersal; pH range: 6.1 - ?.   Tropical, preferred ?

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Africa: known only from an ephemeral pool in the swamps of the Mwawe River (Lake Mweru Wantipa drainage) (Ref. 86819, 95524).

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 3.2 cm SL male/unsexed; (Ref. 86819); 2.6 cm SL (female)

Short description Morphology | Morphometrics

Males similar to other members of N. taeniopygus species-group, differing from all other species of Nothobranchius by caudal and anal fins having broad pale sub-marginal band and dark margin. Nothobranchius oestergaardi differing from members of N. taeniopygus species-group by the following combination of characters: proximal portion of caudal fin plain red (vs. proximally irregularly spotted in N. bocklundi, N. hassoni, N. kafuensis, N. polli, N. rosenstocki, N. hassoni, N. symoensi and N. taenipygus or caudal fin covered with spots in N. brieni and N. malaissei); dorsal fin without coloured margin (vs. black fin margin in N. rubroreticulatus or broad light blue fin margin in N. brieni, N. polli and N. symoensi), body without distinct black spots anteriorly (vs. black spots present in N. rosenstocki and N. taeniopygus); anal fin striped (vs. anal fin irregularly striped in N. hassoni and N. polli, spots concentrated on proximal portion in N. brieni, N. kaftensis, and N. malaissei, or anal fin completely marbled in N. rosenstocki and N. symoensi), distal portion of anal fin cream then light blue (vs. yellow in N. boklundi, N. polli, pale yellow to yellow white in N. taeniopygus, light blue or orange in N. kaftensis, light blue in N. rubroreticulatus and red in N. rosenstocki) and with broad dark brown border (vs. narrow dark border in N. boklundi, N. brieni, N. kaftensis, N. polli, or light blue margin in N. symoensi); distal portion of pelvic fin plain light blue (vs. spotted in N. boklundi N. brieni, N. kaftensis and N. polli, plain red in N. rosenstocki, black in N. rubroreticulatus and N. taeniopygus). Nothobranchius oestergaardi males with relatively shorter caudal peduncle compared to N. boklundi (17.0-21.3 vs. 19.1-26.6 % SL); shallower and longer caudal peduncle compared to N rosenstocki (13.6-16.0 vs. 10.1-12.9 % SL and 17.0-21.3 vs. 12.5-14.5 % SL respectively); shallower caudal peduncle compared to N. symoens (13.6-16.0 vs. 12.8 % SL); longer predorsallength compared to N. hassoni (57.5-62.5 vs. 52.8-56.4 % SL), N. rosenstocki (57.5-62.5 vs. 48.3-52.9 % SL), N. rubroreticulatus (57.5-62.5 vs. 53.3-57.6 % SL) and N. symoensi (57.5-62.5 vs. 55.1 % SL); longer prepelvic length compared to N. brieni (49.6-52.3 vs. 43.3-45.2 % SL), N. taeniopygus (49.6-52.3 vs. 42.1-48.9 % SL) and N. symoensi (49.6-52.3 vs. 48.2 % SL); and longer preanal length compared to N. brieni (56.2-64.4 vs. 52.9-54.5 % SL) (Ref. 86819).

Biology     Glossary (e.g. epibenthic)

The type locality was at the time of collection a pond about 15 m in diameter and circa 1.5 m deep at its centre (Ref. 86819). The water was light clay grey and turbid, with Ph 6.1 and conductivity 207 µS/cm (Ref. 86819). The aquatic vegetation consisted of a Nymphea species and other fish at the type locality were a juvenile Ctenopoma, an unidentified haplochromine, Barbus neefi and Lacustricola moeruensis (Ref. 86819).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Valdesalici, S. and G. Amato, 2011. Nothobranchius oestergaardi (Cyprinodontiformes: Nothobranchiidae), a new annual killifish from Mweru Wantipa Lake drainage basin, northern Zambia. Aqua, Int. J. Ichthyol. 17(2):111-119. (Ref. 86819)

IUCN Red List Status (Ref. 115185)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries:
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BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | ECOTOX | Faunafri | Fishes of Iran | Fishtrace | GenBank(genome, nucleotide) | GloBI | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Scirus | SeaLifeBase | Tree of Life | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01096 (0.00447 - 0.02692), b=2.92 (2.71 - 3.13), in cm Total Length, based on LWR estimates for this (Sub)family-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 ().
Vulnerability (Ref. 59153):  Low vulnerability (10 of 100) .