Haplochromis vanoijeni : fisheries

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Haplochromis vanoijeni de Zeeuw & Witte, 2010

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drawing shows typical species in Cichlidae.

Classification / Names Nomi Comuni | Sinonimi | Catalog of Fishes(Genere, Specie) | ITIS | CoL | WoRMS | Cloffa

> Cichliformes (Cichlids, convict blennies) > Cichlidae (Cichlids) > Pseudocrenilabrinae
Etymology: Haplochromis: Greek, Haploos = single + Greek, chromis = a fish, perhaps a perch (Ref. 45335);  vanoijeni: This species is named in honour of Dr. Martien J.P. van Oijen, ichthyologist of the Netherlands Centre of Biodiversity, Naturalis, in appreciation for his work on taxonomy and ecology of the haplochromine cichlids of Lake Victoria; Dr. van oijen was one of the pioneers of the Haplochromis Ecology Survey Team (HEST) of Leiden University that started its fieldwork on Lake Victoria in 1977 (Ref. 85523).

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

; acqua dolce demersale. Tropical

Distribuzione Stati | Aree FAO | Ecosystems | Presenze | Point map | Introduzioni | Faunafri

Africa: Lake Victoria (Ref. 85523).

Size / Peso / Age

Maturity: Lm ?  range ? - ? cm
Max length : 8.9 cm SL maschio/sesso non determinato; (Ref. 85523)

Short description Morfologia | Morfometria

Diagnosis: Haplochromis vanoijeni is a small sized (less than 9 cm standard length), micrognathic species with generalized body profile, but with a relatively long and acute snout; because of the latter, and its relatively small interorbital width, the species bears some resemblance with species of the 'tridens' group; indeed, it has some tricuspid teeth rostrally in the outer row of the oral jaws (Ref. 85523). It differs from eight of the nine described species in the 'tridens' group in the colouration of sexually active males: dorsum and flanks in sexually active males of Haplochromis vanoijeni are bright red; both males and females have conspicuously silverish-white cheeks, contrasting with the remaining head colours, which is a unique character among Lake Victoria haplochromines (Ref. 85523). From Haplochromis tridens, of which the colouration of live, sexually active males is unknown, it differs in the following characters: the lower jaw is shorter, lower jaw length 40.9-44.7% of head length vs. 43.3-51.8%; a larger interorbital width, 17.6-20.5% of head length vs. 15.0-19.5%; in contrast to H. vanoijeni, H. tridens has a dorsal head profile that is interrupted by a prominent premaxillary pedicel, and a cephalic line system with prominent pores (Ref. 85523). Besides by its specific colouration pattern, H. vanoijeni can be distinguished from all described species in the 'tridens' group by its larger body depth, 33.1-36.2% of standard length vs. 30.6-33.6%; the lower jaw of H. vanoijeni is shorter, 40.9-44.7% of standard length, than tah of most described species in the 'trident' group, except for that of H. cryptogramma and that of H. plutonius (Ref. 85523).

Biologia     Glossario (es. epibenthic)

A benthic species, caught mainly in the deeper parts, more than 10 m depth, in the Mwanza Gulf, over mud bottoms; occasionally caught over mud in shallower areas (Ref. 85523). Before the ecological changes in Lake Victoria, this species fed mainly on detritus; occasionally remains of shrimps and insects were found (Ref. 85523). This species is a female mouth brooder (Ref. 85523).

Life cycle and mating behavior Maturità | Riproduzione | Deposizione | Uova | Fecundity | Larve

This species is a female mouth brooder (Ref. 85523).

Main reference Upload your references | Bibliografia | Coordinatore : Kullander, Sven O. | Collaboratori

de Zeeuw, M.P., M. Mietes, P. Niemantsverdriet, S. ter Huurne and F. Witte, 2010. Seven new species of detritivorous and phytoplanktivorous haplochromines from Lake Victoria. Zool. Meded. Leiden 84:201-250. (Ref. 85523)

IUCN Red List Status (Ref. 130435)

  Vulnerabile, vedi Lista Rossa IUCN (VU) (D2); Date assessed: 31 March 2010

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

Pesca:
FAO - Publication: search | FishSource |

Informazioni ulteriori

Stati
Aree FAO
Ecosystems
Presenze
Introduzioni
Stocks
Ecologia
Dieta
Prede
Consumo di cibo
Razione
Nomi Comuni
Sinonimi
Metabolismo
Predatori
Ecotossicologia
Riproduzione
Maturità
Deposizione
Spawning aggregation
Fecundity
Uova
Egg development
Age/Size
Accrescimento
Length-weight
Length-length
Length-frequencies
Morfometria
Morfologia
Larve
Dinamica popolazioni larvali
Reclutamento
Abbondanza
BRUVS
Bibliografia
Acquacoltura
Profilo di acquacoltura
Varietà
Genetica
Electrophoreses
Ereditarietà
Malattie
Elaborazione
Nutrients
Mass conversion
Collaboratori
Immagini
Stamps, Coins Misc.
Suoni
Ciguatera
Velocità
Modalità di nuoto
Area branchiale
Otoliths
Cervelli
Vista

Strumenti

Special reports

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Fonti Internet

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: Genere, Specie | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: genome, nucleotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | Tree of Life | Wikipedia: Go, ricerca | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01514 (0.00700 - 0.03275), b=2.97 (2.80 - 3.14), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic level (Ref. 69278):  3.3   ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100).