Taxonomic Remarks
For taxonomic remarks, see Géry (1964: 9-10).
Περιβάλλον: περιβάλλον / κλιματική ζώνη / εύρος βάθους / εύρος διανομής
Οικολογία
; Γλυκού νερού βενθοπελαγικό. Subtropical
South America: Amazon, Paraguay, Corantijn and Orinoco River basins.
Μέγεθος / Βάρος / Ηλικία
Γεννητική Ωρίμανση: Lm ? range ? - ? cm
Max length : 4.8 cm TL αρσενικό/απροσδιόριστο; (Ref. 38376)
Σύντομη περιγραφή
Κλείδες προσδιορισμού | Μορφολογία | Μορφομετρία
Μαλακές ραχιαίες ακτίνες (συνολικά) : 11; Μαλακές εδρικές ακτίνες: 26 - 30; Σπόνδυλοι: 32 - 33. Hemigrammus lunatus is distinguished from most congeners, except from H. barrigonae, H. machadoi and H. ulreyi, by having wide dark horizontal stripe across the eye (vs. eye stripes absent or, when present, vertical in the remaining congeners). It differs also from most congeners, with the exception of H. barrigonae, H. boesemani H. geisleri, H. machadoi, H. mimus, and H. ulreyi, by having well defined narrow dark stripe at the basis of the anal fin (vs. dark stripe at the basis of anal fin absent). It can be readily diagnosed from H. boesemani, H. geisleri, and H. mimus, by having a distinct roundish dark humeral blotch (vs. humeral blotch absent) and by lacking a blotch on caudal peduncle or any distinct patch of pigmentation on caudal fin (vs. blotch on caudal peduncle present in H. boesemaniand H. geisleri, a dark marking present at the basis of each caudal-fin lobe basis in H. mimus). It differs from H. barrigonae and H. ulreyi by lacking a narrow, well-defined longitudinal dark stripe (vs. present), and by lacking a discrete blotch on caudal peduncle (vs. present in H. barrigonae) or a dark pigmentation patch on the basis of anteriormost dorsal-fin rays (vs. present in H. ulreyi). It differs from H. machadoi by having the following characters: a small roundish dark humeral blotch, extending horizontally from fourth through sixth lateral-line scales, and vertically from fourth through fifth scale rows above lateral line (vs. conspicuous, vertically elongated humeral blotch, extending horizontally from second through sixth lateral-line scales, and vertically from third row above lateral line to first row below it); 6-7 gill-rakers on upper branch and 11-12 on lower (vs. 4-5, and 9-10, respectively); the lower number of cusps of inner premaxillary, dentary, and maxillary largest tooth (5 vs. 5-7 cusps, mode 7, in premaxillary and dentary; 1-3 vs. 3-5, mode 5, in maxillary); and 32-33 total vertebrae (vs. 34-35) (Ref. 96864).
Body shape (shape guide): fusiform / normal.
Usually inhabits slow flowing, low-gradient streams and small rivers. Also found in floodplain lakes associated with white-water rivers in central Amazon. An ubiquitous and abundant species in lagoons and riverine habitats across a piedmont/lowland river stretch in río Napo basin in Amazonian Ecuador (Ref. 96864). Maximum length questionable (Ref. 38376).
Κύκλος ζωής και συμπεριφορά ζευγαρώματος
Γεννητική Ωρίμανση | Αναπαραγωγή | Γεννοβολία | Αβγά | Γονιμότητα | Προνύμφες
Ota, R.P., F.C.T. Lima and C.S. Pavanelli, 2014. A new species of Hemigrammus Gill, 1858 (Characiformes: Characidae) from the rio Madeira and rio Paraguai basins, with a redescription of H. lunatus. Neotrop. Ichthyol. 12(2):265-279. (Ref. 96864)
Κατάσταση Κόκκινου Καταλόγου IUCN (Ref. 130435: Version 2025-2 (Global))
Απειλή για τον άνθρωπο
Harmless
Ανθρώπινες χρήσεις
Εργαλεία
Ειδικές εκθέσεις
Λήψη XML
Διαδικτυακές πηγές
Εκτιμήσεις βάσει μοντέλων
Δείκτης φυλογενετικής ποικιλότητας (Αναφ.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01479 (0.00718 - 0.03045), b=3.14 (2.96 - 3.32), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245).
Τροφικό Επίπεδο (Αναφ.
69278): 3.3 ±0.4 se; based on size and trophs of closest relatives
Ελαστικότητα (Αναφ.
120179): Υψηλό, ελάχιστος χρόνος για διπλασιασμό πληθυσμού < 15 μήνες (Preliminary K or Fecundity.).
Ευπάθεια στην αλιεία (Ref.
59153): Low vulnerability (10 of 100).
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