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Characiformes (Characins) >
Distichodontidae (Distichodus)
Etymology: Nannocharax: Latin, nannus = small + Greek, charax = a marine fish without identification (Ref. 45335); zebra: The species name zebra is an allusion to the striped pattern of preserved specimens (Ref. 80507).
पर्यावरण: पर्यावरण / जलवायु क्षेत्र / गहराई सीमा / वितरण सीमा
पारिस्थितिकी
; स्वच्छ जल, अलवण जल पिलाजिक. Tropical; 6°N - 5°N, 6°E - 10°E
Africa: Cross River and Niger Delta (Ref. 80507).
आकार / वज़न / आयु
परिपक्व अवधि: Lm ?  range ? - ? cm
Max length : 4.1 cm SL पुल्लिंग / अलिंग; (Ref. 80507)
संक्षिप्त वर्णन
पहचान कुंजी | आकृति विज्ञान | मौरफोमैटरिक्स
पृष्ठीय रीढ़ (सम्पूर्ण) : 0; पृष्ठीय सौफट रेज़ (सम्पूर्ण) : 12 - 14; गुदा कांटा: 0; ऐनल सौफट रेज़: 12 - 13. Diagnosis: Nannocharax zebra is distinguished from all other described Nannocharax species except N. schoutedeni, N. latifasciatus, N. ansorgii and N. procatopus, by its shorter distance between posterior border of anus and articulation of first anal-fin ray (2.2-3.8 vs. 4.2-14.2% of standard length) (Ref. 80507). It differs from N. schoutedeni by having 39-43 vs. 36 or 37 lateral line scales, from N. latifasciatus by its major depth of caudal peduncle (55.9-63.8% vs. 48.1-50.8% of standard length), from N. ansorgii by having 12-13 rather than 9 anal-fin rays, and from N. procatopus by having a lower caudal peduncle length (11.3-15.2% vs. 18.0% of standard length), and by having 39-43 rather than 36 lateral line scales (Ref. 80507).
Body shape (shape guide): elongated; Cross section: compressed.
Type specimens collected inshore in areas of relatively calm water among fine twigs of a fallen tree; these twigs were not reaching soil, but remained attached to the crown of the fallen tree and reaching into the free water column; specimens sometimes rested on the fine twigs, but mostly were seen moving or hovering in the free water column in a water depth of aproximately 50-100 cm, well above the bottom which consisted of leaflitter, sand and fine detritus (Ref. 80507).
जीवन चक्र और संभोग व्यवहार
परिपक्व अवधि | पुनरुत्पत्ति | मछलीऔ का अंडे देना | अंडे | उपजाऊपन | लार्वा
Dunz, A.R. and U.K. Schliewen, 2009. Description of two new species of Nannocharax Günther, 1867 (Teleostei: Characiformes: Distichodontidae) from the Cross River, Cameroon. Zootaxa 2028:1-19. (Ref. 80507)
आईयूसीएन रेड लिस्ट स्थिति (Ref. 130435: Version 2025-2 (Global))
मनुष्यों के लिए ख़तरा
Harmless
मानव उपयोग
मात्स्यिकी: बाबत संभावित दिलचस्पी
साधन
विशेष रिपोर्ट
XML डाउनलोड करें
इंटरनेट स्रोत
मॉडल पर आधारित अनुमान
जातिवृति विविधता सूचकांक (संदर्भ 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00447 (0.00185 - 0.01077), b=3.17 (2.96 - 3.38), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
ट्रॉफिक स्तर (संदर्भ 69278) |
3.1 ±0.4 se; based on size and trophs of closest relatives |
मछली पकड़ने की भेद्यता (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |
मूल्य श्रेणी (Ref. 80766) |
Unknown.
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