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Characiformes (Characins) >
Distichodontidae (Distichodus)
Etymology: Nannocharax: Latin, nannus = small + Greek, charax = a marine fish without identification (Ref. 45335); zebra: The species name zebra is an allusion to the striped pattern of preserved specimens (Ref. 80507).
Environment: milieu / climate zone / depth range / distribution range
Ecologia
; Água doce bentopelágico. Tropical; 6°N - 5°N, 6°E - 10°E
Africa: Cross River and Niger Delta (Ref. 80507).
Tamanho / Peso / Idade
Maturity: Lm ? range ? - ? cm
Max length : 4.1 cm SL macho/indeterminado; (Ref. 80507)
Descrição breve
Chaves de identificação | Morfologia | Morfometria
Espinhos dorsais (total) : 0; Raios dorsais moles (total) : 12 - 14; Espinhos anais: 0; Raios anais moles: 12 - 13. Diagnosis: Nannocharax zebra is distinguished from all other described Nannocharax species except N. schoutedeni, N. latifasciatus, N. ansorgii and N. procatopus, by its shorter distance between posterior border of anus and articulation of first anal-fin ray (2.2-3.8 vs. 4.2-14.2% of standard length) (Ref. 80507). It differs from N. schoutedeni by having 39-43 vs. 36 or 37 lateral line scales, from N. latifasciatus by its major depth of caudal peduncle (55.9-63.8% vs. 48.1-50.8% of standard length), from N. ansorgii by having 12-13 rather than 9 anal-fin rays, and from N. procatopus by having a lower caudal peduncle length (11.3-15.2% vs. 18.0% of standard length), and by having 39-43 rather than 36 lateral line scales (Ref. 80507).
Type specimens collected inshore in areas of relatively calm water among fine twigs of a fallen tree; these twigs were not reaching soil, but remained attached to the crown of the fallen tree and reaching into the free water column; specimens sometimes rested on the fine twigs, but mostly were seen moving or hovering in the free water column in a water depth of aproximately 50-100 cm, well above the bottom which consisted of leaflitter, sand and fine detritus (Ref. 80507).
Life cycle and mating behavior
Maturities | Reprodução | Spawnings | Egg(s) | Fecundities | Larvas
Dunz, A.R. and U.K. Schliewen, 2009. Description of two new species of Nannocharax Günther, 1867 (Teleostei: Characiformes: Distichodontidae) from the Cross River, Cameroon. Zootaxa 2028:1-19. (Ref. 80507)
Categoria na Lista Vermelha da IUCN (Ref. 130435)
Ameaça para o homem
Harmless
Utilização humana
Ferramentas
Relatórios especiais
Descarregue XML
Fontes da internet
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00380 (0.00147 - 0.00981), b=3.11 (2.88 - 3.34), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Nível Trófico (Ref.
69278): 3.1 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
