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Nannocharax altus : fisheries
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Nannocharax altus
Picture by
MNHN
Teleostei (teleosts) >
Characiformes
(Characins) >
Distichodontidae
(Distichodus)
Etymology:
Nannocharax:
Latin, nannus = small + Greek, charax = a marine fish without identification (Ref.
45335
)
.
More on author:
Pellegrin
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; pelagic. Tropical
Africa: Lower Guinea endemic, only known from the Kouilou River basin in the Republic of Congo (Ref.
81638
).
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 5.8 cm TL male/unsexed; (Ref.
7094
)
Short description
Morphology
|
Morphometrics
Dorsal
spines
(total): 0;
Dorsal
soft rays
(total): 15-16;
Anal
spines
: 0;
Anal
soft rays
: 12 - 13. Diagnosis: 38-40 lateral line scales; 9-10 branched anal fin rays; mid-lateral pigmentation on body absent or at most irregular and not forming distinct band; dorsal portions of body without distinct vertically oriented dark marks that form saddle-shaped pigmentation pattern (Ref.
81638
).
Maximum SL recorded is 37 mm (Ref.
81638
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Vari, R.P.
, 2007. Distichodontidae. p. 412-465. In M.L.J. Stiassny, G.G. Teugels and C.D. Hopkins (eds.) The fresh and brackish water fishes of Lower Guinea, West-Central Africa. Volume I. Collection Faune et Flore tropicales 42. Institut de Recherche pour le Développement, Paris, France, Muséum National d’Histoire Naturelle, Paris, France, and Musée Royal de l’Afrique Centrale, Tervuren, Belgium. 800 pp. (Ref.
81638
)
IUCN Red List Status (Ref.
130435
)
Endangered (EN)
(B1ab(iii)+2ab(iii)); Date assessed:
16 February 2009
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries:
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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
).
Trophic level (Ref.
69278
): 3.1 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153
): Low vulnerability (10 of 100).
Price category (Ref.
80766
):
Unknown
.
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- 20 July 2016
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