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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).
Περιβάλλον: περιβάλλον / κλιματική ζώνη / εύρος βάθους / εύρος διανομής
Οικολογία
; Γλυκού νερού Πελαγικό(ά). Tropical; 6°N - 5°N, 6°E - 10°E
Africa: Cross River and Niger Delta (Ref. 80507).
Μέγεθος / Βάρος / Ηλικία
Γεννητική Ωρίμανση: Lm ?  range ? - ? cm
Max length : 4.1 cm SL αρσενικό/απροσδιόριστο; (Ref. 80507)
Σύντομη περιγραφή
Κλείδες προσδιορισμού | Μορφολογία | Μορφομετρία
Ραχιαίες άκανθες (συνολικά) : 0; Μαλακές ραχιαίες ακτίνες (συνολικά) : 12 - 14; Εδρικές άκανθες: 0; Μαλακές εδρικές ακτίνες: 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).
Κύκλος ζωής και συμπεριφορά ζευγαρώματος
Γεννητική Ωρίμανση | Αναπαραγωγή | Γεννοβολία | Αβγά | Γονιμότητα | Προνύμφες
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)
Κατάσταση Κόκκινου Καταλόγου IUCN (Ref. 130435: Version 2025-2 (Global))
Απειλή για τον άνθρωπο
Harmless
Ανθρώπινες χρήσεις
αλιεία: με δυνητικό ενδιαφέρον
Εργαλεία
Ειδικές εκθέσεις
Λήψη XML
Διαδικτυακές πηγές
Εκτιμήσεις βάσει μοντέλων
Δείκτης φυλογενετικής ποικιλότητας (Αναφ. 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). |
Τροφικό Επίπεδο (Αναφ. 69278) |
3.1 ±0.4 se; based on size and trophs of closest relatives |
Ευπάθεια στην αλιεία (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |
Κατηγορία τιμής (Ref. 80766) |
Unknown.
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