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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
पारिस्थितिकी
; स्वच्छ जल, अलवण जल पिलाजिक; 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).
आकार / वज़न / Age
Maturity: Lm ? range ? - ? cm
Max length : 4.6 cm TL पुल्लिंग / अलिंग; (Ref. 129519)
Short description
पहचान कुंजी | आकृति विज्ञान | मौरफोमैटरिक्स
पृष्ठीय रीढ़ (सम्पूर्ण) : 0; पृष्ठीय सौफट रेज़ (सम्पूर्ण) : 12 - 13; गुदा कांटा: 0; ऐनल सौफट रेज़: 8; जानवरों की रीड़ का जोड़: 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
परिपक्व अवधि | पुनरुत्पत्ति | मछलीऔ का अंडे देना | अंडे | Fecundity | लार्वा
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: Version 2024-1)
Threat to humans
Harmless
Human uses
मात्स्यिकी: बाबत संभावित दिलचस्पी
साधन
Special reports
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इंटरनेट स्रोत
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=0.00447 (0.00189 - 0.01058), b=3.17 (2.96 - 3.38), 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).
