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Nannocharax luapulae
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drawing shows typical species in Distichodontidae.
Teleostei (teleosts) >
Characiformes
(Characins) >
Distichodontidae
(Distichodus)
Etymology:
Nannocharax:
Latin, nannus = small + Greek, charax = a marine fish without identification (Ref.
45335
)
;
luapulae:
Specific name,
luapulae
, is named after the Luapula River, from which the holotype was collected (Ref.
129519
)
.
More on author:
Boulenger
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; pelagic; pH range: 6.8 - 6.8. Tropical; 19°C - 19°C (Ref.
129519
)
Africa: restricted ot Bangweulu-Mweru ecoregion in Democratic Republic of the Congo and Zambia (Ref.
95585
,
129519
), including Luapula River (Ref.
42540
,
129519
). Its occurrence in Upper Lualaba River (Ref.
2970
) and lower Lufira River is not confirmed (Ref.
129519
).
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 4.6 cm TL male/unsexed; (Ref.
129519
)
Short description
Morphology
|
Morphometrics
Dorsal
spines
(total): 0;
Dorsal
soft rays
(total): 12-13;
Anal
spines
: 0;
Anal
soft rays
: 8;
Vertebrae
: 39. Diagnosis:
Nannocharax luapulae
can be distinguished from all its congeners by the following unique combination of characters: its body colouration, which consist of 8 to 10 vertically ovoid or rounded black blotches that overlie a longitudinal mid-lateral black stripe vs. largely unpigmented body with only a black spot at the base of the caudal fin in
N. hastatus
,
N. maculicauda
and
N. ocellicauda
, six or seven rounded, well-spaced, mid-lateral black spots in
N. gracilis
, 17 black bars in
N. fasciolaris
, a broad black longitudinal band running on flanks along two rows of scales in
N. latifasciatus
, or a thin black lateral band covering only the lateral line scales, extending from snout to median rays of caudal fin in
N. taenia
; a completely pored lateral line vs. incompletely pored in
N. angolensis
,
N. dageti
,
N. lineostriatus
,
N. machadoi
,
N. minutus
,
N. monardi
,
N. multifasciatus
,
N. rubensteini
,
N. uniocellatus
and
N. wittei
; 49-55 lateral line scales vs. 38-40 scales in
N. altus
, 40-45 scales in
N. ansorgii
, 37-40 scales in
N. brevis
, 38-42 scales in
N. fasciatus
, 37-43 scales in
N. hadros
, 42 scales in
N. hollyi
, 45-48 scales in
N. macropterus
, 36-37 scales in
N. micros
, 36 scales in
N. ogoensis
, 36-40 scales in
N. parvus
, 38-43 scales in
N. procatopus
, 38 scales in
N. pteron
, 46-48 scales in
N. reidi
, 46-48 scales in
N. signifer
, 38-39 scales in
N. schoutedeni
, 43-44 scales in
N. seyboldi
, 38-44 scales in
N. usongo
and 39-43 scales in
N. zebra
; and a dorsal-fin origin that is situated anterior, 1-2 lateral line scales, to the pelvic-fin origin vs. origin situated well behind the pelvic-fin origin in
N. lineomaculatus
,
N. rubrolabiatus
, or at the same level in
N. elongatus
,
N. intermedius
,
N. niloticus
and
N. occidentalis
(Ref.
129519
).
Nannocharax luapulae
is most similar to
N. chochamandai
but can be distinguished from it by a low number of branched soft fin rays in dorsal and anal fins, 9-10 and 5 vs. 11-12 and 8-9; a high number of lateral ine scales, 49-55 vs. 41-46; a short pectoral fin, 18.3-20.6% of standard length, not reaching the pelvic-fin insertion but extending to the level of the anterior dorsal-fin base origin, vs. 21.6-28.4% of standard length, reaching the pelvic-fin insertion and the level of about the middle of the dorsal-fin base; a short pelvic fin, 20.0-22.9% of standard length, not reaching the anal-fin insertion but extending to about mid-level of the dorsal-adipose fin distance, vs. 24.3-30.6% of standard length, reaching the anal-fin insertion and the level of the last one fourth of the dorsal-adipose fin distance; and a short anal fin, 13.6-15.1% of standard length vs. 15.6-19.0% (Ref.
129519
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Daget, J. and J.-P. Gosse
, 1984. Distichodontidae. p. 184-211. In J. Daget, J.-P. Gosse and D.F.E. Thys van den Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). ORSTOM, Paris and MRAC, Tervuren. Vol. 1. (Ref.
7094
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
16 February 2009
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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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=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this 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).
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Page last modified by :
mrius-barile
- 20 July 2016
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