Classification / Names
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Characiformes (Characins) >
Distichodontidae (Distichodus)
Etymology: Nannocharax: Latin, nannus = small + Greek, charax = a marine fish without identification (Ref. 45335); hadros: The specific name is derived from the Greek adjective 'hadros', meaning well-developed, strong, great, bulky and refers to its large maximum size, exceeding that of its currently known congeners (Ref. 127100).
Environment: milieu / climate zone / depth range / distribution range
पारिस्थितिकी
; स्वच्छ जल, अलवण जल बेनथोपिलाजिक; pH range: 7.0 - 8.4; गहराई सीमा 1 - 1 m (Ref. 127100). Tropical; 18°C - 28°C (Ref. 127100)
Africa: Kalule Nord River, Upper Lualaba, Congo River basin in Democratic Republic of the Congo (Ref. 127100).
आकार / वज़न / Age
Maturity: Lm ? range ? - ? cm
Max length : 7.8 cm SL पुल्लिंग / अलिंग; (Ref. 127100)
Short description
आकृति विज्ञान | मौरफोमैटरिक्स
पृष्ठीय रीढ़ (सम्पूर्ण): 0; पृष्ठीय सौफट रेज़ (सम्पूर्ण): 13-14; गुदा कांटा 0; ऐनल सौफट रेज़: 8 - 9; जानवरों की रीड़ का जोड़: 32 - 33. Diagnosis: Nannocharax hadros is distinguished from all its congeners by the possession of a completely pored lateral line vs. incompletely in N. angolensis, N. dageti, N. hastatus, N. lineostriatus, N. machadoi, N. minutus, N. monardi, N. multifasciatus, N. ocellicauda, N. rubensteini, N. uniocellatus and N. wittei; 37-43 lateral line scales vs. fewer scales in N. ogoensis (36) and N. pteron (35), and more scales in N. elongatus (52-57), N. intermedius (46-55), N. lineomaculatus (47-53), N. luapulae (49-55), N. macropterus (45-47), N. maculicauda (55-61), N. niloticus (50-55), N. occidentalis (50-56), N. reidi (46-48), N. rubrolabiatus (45-50), and N. signifer (46-48); 14-16 circumpeduncular scales, vs. 12 in N. altus and N. schoutedeni; 11-12 scales between the dorsal and adipose fins, vs. 9-10 in N. brevis, and 8-9 in N. seyboldi (Ref. 127100). In N. hadros, the dorsal-fin origin is situated well behind the pelvic-fin origin, vs. origin situated anterior to pelvic-fin origin in N. ansorgii, N. fasciolaris, N. gracilis, N. hollyi, N. latifasciatus, N. micros, and N. taenia or at the same level as the pelvic-fin origin in N. fasciatus; Nannocharax hadros has the tip of the longest pectoral-fin ray extending beyond the vertical through the insertion of the pelvic fin, vs. not reaching the pelvic-fin insertion in N. parvus, and a large distance between the posterior margin of the anus and the insertion of first anal-fin ray, 5.5-8.4% of standard length vs. 0.9-1.9% in N. usongo and 2.2-3.8% in N. zebra; it is most similar to N. procatopus and can be distinguished from it by a higher number of pectoral-fin rays, 16-17 vs. 12-15, respectively, a deeper body at the anal-fin origin, 15.5-19.3% of standard length vs. 10.9-15.0%, respectively, and a smaller internostril distance, 11-16% of head length vs. 17-23%, respectively (Ref. 127100).
Found in a shallow water zone with a high current over the rocky substrate (Ref. 127100)
Life cycle and mating behavior
परिपक्व अवधि | पुनरुत्पत्ति | मछलीऔ का अंडे देना | अंडे | Fecundity | लार्वा
Katemo Manda, B., J. Snoeks, A. Chocha Manda and E. Vreven, 2021. Nannocharax hadros (Teleostei: Distichodontidae), a new species from the Kalule Nord River in the Upemba National Park, Upper Congo basin. Ichthyol. Explor. Freshwaters 30(4):317-330. (Ref. 127100)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
अधिक जानकारी
आम नामउपशब्दचपायचयपरभक्षीईकोटोकसीकोलौजीपुनरुत्पत्तिपरिपक्व अवधिमछलीऔ का अंडे देनाSpawning aggregationFecundityअंडेEgg development
Age/Sizeबाढ़Length-weightLength-lengthLength-frequenciesमौरफोमैटरिक्सआकृति विज्ञानलार्वालारवल गतिकीभर्तीबहुतायतBRUVS
संदर्भजलीयकृषिजलीयकृषि रूपरेखाखींचआनुवंशिकीElectrophoresesहैरेटिबिलटीबीमारीप्रक्रमणNutrientsMass conversion
सहयोगीयोतस्वीरेStamps, Coins Misc.ध्वनिसिगुयटिरारफ्तारतैरने के प्रकारगिल क्षेत्रOtolithsदिमागदृष्टि
साधन
Special reports
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इंटरनेट स्रोत
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = No PD50 data [Uniqueness, from 0.5 = low to 2.0 = high].
Trophic level (Ref.
69278): 3.2 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
