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Characiformes (Characins) >
Acestrorhamphidae (American tetras) > Hyphessobryconinae
Etymology: Hyphessobrycon: Greek, hyphesson, -on, -on = a little smaller + Greek, bryko = to bite (Ref. 45335); kayabi: Named for the the Kayabi Indians, a Tupi-speaking Indian nation, who, after suffering severe onslaughts from the western/Brazilian society during the first half of the 20th Century, still survive as a small group in a recently established area at the lower Rio Teles Pires, but mostly as a transplanted population at the Xingu Indigenous Park.
Eponymy: The Kayabi are a Tupí-speaking Indian nation that lived in the region of the rivers Arinos, dos Peixes and Teles Pires, Mato Grosso, Brazil. [...] (Ref. 128868), visit book page.
Lingkungan: lingkungan / zona iklim / kisaran kedalaman / jangkauan distribusi
Ekologi
; air tawar bentopelagis. Tropical
South America: Rio Teles Pires, Rio Tapajós basin in Brazil.
Ukuran / Berat / umur
Kematangan: Lm ? range ? - ? cm
Max length : 2.8 cm SL jantan/; (Ref. 94770)
deskripsi pendek
Kunci identifiaksi (pengenalan) | Morfologi | Morfometrik
duri punggung lunak (Keseluruhan (total)) : 10 - 12; Sirip dubur lunak: 21 - 24. Hyphessobrycon kayabi can be diagnosed from all its congeners, except for H. bifasciatus, H. cyanotaenia, H. heliacus, H. igneus, H. loweae and H. peugeoti by having distal border of the anal fin slightly convex to straight, without a distinct anterior lobe in adult males, with last unbranched ray and first to second branched ray shorter than the subsequent branched rays (vs. distinct anterior lobe present in most congeners, with last unbranched ray and first and second branched rays longer than remaining rays). It differs from H. bifasciatus, H. cyanotaenia, H. heliacus, H. igneus, H. loweae, and H. peugeoti by having octa- to decacuspid inner premaxillary teeth (vs. tetra- to pentacuspid in H. bifasciatus and H. igneus, heptacuspid in H. heliacus, penta- to heptacuspid in H. cyanotaenia and H. loweae, and hexa- to heptacuspid in H. peugeoti), and by having dark chromatophores concentrated on the posterior border of the body scales, forming a reticulated color pattern (vs. reticulated pattern absent). It can be separated from Hyphessobrycon heliacus, H. loweae, and H. peugeoti by the absence of an elongated, filamentous dorsal fin in adult males (vs. elongated, filamentous dorsal fin present in adult males). It further differs from H. bifasciatus by having a single humeral blotch (vs. two well-defined humeral blotches) and from H. bifasciatus and H. igneus by having 17-20 branched anal-fin rays (vs. 27-32 in H. bifasciatus, and 23-29 in H. igneus) and by the absence of hooks on anal fin in mature males (vs. presence in H.bifasciatus and H. igneus) (Ref. 94770).
Body shape (shape guide): elongated.
The type locality, Lagoa Azul, a terra-firme lake near the margin of the Rio Teles Pires, connected to it, with crystal-clear water, fed by springs at the bottom of the lake, and large stands of
subaquatic macrophytes. Stomach content analysis based on three specimens reveals that this species feeds mostly on vegetal matter (macrophyte fragments, unicellular and filamentous algae), and a smaller proportion of other organisms (testate amoebae, Cladocera, aquatic Hemiptera, Chironomidae larvae, unidentified invertebrate eggs). Observed during snorkeling sessions to browse on the periphyton growing on the surface of large submerged macrophytes leaves (Nymphaeaceae). Occurs syntopically at Lagoa Azul with other characids including Thayeria sp., Hemigrammus sp., Moenkhausia ceros, M. cotinho, M. colletti, and M. cf. lepidura, as well as several cichlids, anostomids, poeciliids, and stingrays (Ref. 94770).
Siklus hidup dan perilaku kawin
Kematangan | Reproduksi, perkembang biakan | Pemijahan | telur-telur | Fekunditas | Larva
Teixeira, T.F., F.C.T. Lima and J. Zuanon, 2013. A new Hyphessobrycon Durbin from the Rio Teles Pires. Rio Tapajós basin, Mato Grosso State, Brazil. (Characiformes: Characidae). Copeia 2013(4):612-621. (Ref. 94770)
Status IUCN Red List (Ref. 130435: Version 2025-2 (Global))
ancaman kepada manusia
Harmless
penggunaan manusia
Perikanan: tidak ada kepentingan
Alat, peralatan
laporan khas
muat turun XML
Sumber internet
Estimasi berdasarkan model
Indeks keanekaragaman filogenetik (Acuan
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00676 (0.00269 - 0.01698), b=3.12 (2.90 - 3.34), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Tingkat Trofik (Acuan
69278): 2.9 ±0.3 se; based on size and trophs of closest relatives
Daya lenting (Acuan
120179): Tinggi, Waktu penggandaan populasi minimum kurang dari 15 bulan (Preliminary K or Fecundity.).
Kerentanan Penangkapan Ikan (Ref.
59153): Low vulnerability (10 of 100).
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