Classification / Names
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Characiformes (Characins) >
Distichodontidae (Distichodus)
Etymology: Nannocharax: Latin, nannus = small + Greek, charax = a marine fish without identification (Ref. 45335); hastatus: The adjectival species name hastatus, from the Latin 'hasta', meaning spear, is an allusion to the spearshaped body of the species (Ref. 96084).
Environment: milieu / climate zone / depth range / distribution range
पारिस्थितिकी
; स्वच्छ जल, अलवण जल पिलाजिक. Tropical
Africa: Likouala drainage in Republic of Congo (Ref. 96084) and Pool Malebo and Middle Congo River, including Luilaka River and Tshuapa River, in Democratic Republic of the Congo (Ref. 96084).
आकार / वज़न / Age
Maturity: Lm ? range ? - ? cm
Max length : 3.2 cm SL पुल्लिंग / अलिंग; (Ref. 96084)
Short description
पहचान कुंजी | आकृति विज्ञान | मौरफोमैटरिक्स
पृष्ठीय रीढ़ (सम्पूर्ण) : 0; पृष्ठीय सौफट रेज़ (सम्पूर्ण) : 11 - 14; गुदा कांटा: 0; ऐनल सौफट रेज़: 13 - 15; जानवरों की रीड़ का जोड़: 40 - 42. Diagnosis: Nannocharax hastatus is distinguished from all congeners except N. maculicauda and N. ocellicauda by the possession of a largely unpigmented body except for a dark line along the bases of the dorsal and anal fins and a longitudinally elongate, ovoid, dark spot on the posterior portion of the caudal peduncle and bases of the central caudal-fin rays; the elongate form of the head and body are also unique to these three species in the genus (Ref. 96084). Nannocharax hastatus differs from N. maculicauda in the numbers of scale rows around the caudal peduncle, 18-20 vs. 14-16; and pored scales along the lateral line, 6-9 vs. 55-61 (Ref. 96084). Nannocharax hastatus is distinguished from N. ocellicauda in the number of scales along the lateral-line scale series, 59-68 vs. 50-56; and scale rows around the caudal peduncle, 18-20 vs. 13-16 (Ref. 96084).
Life cycle and mating behavior
Maturities | पुनरुत्पत्ति | Spawnings | Egg(s) | Fecundities | लार्वा
Jerep, F.C. and R.P. Vari, 2014. New species of Nannocharax (Characiformes: Distichontidae) from the Northwestern Congo River Basin, with appraisal of Hemigrammocharax. Copeia 2014(1):44-49. (Ref. 96084)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
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=0.01000 (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).
