分類 / Names
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Characiformes (Characins) >
Characidae (Characins; tetras) > Stethaprioninae
Etymology: Hyphessobrycon: Greek, hyphesson, -on, -on = a little smaller + Greek, bryko = to bite (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
生態学
; 新鮮な水 底生の漂泳性. Tropical
South America: tributaries of the rio Grande (rio São Francisco basin) draining east to the Serra Geral de Goiás, from the rio São Domingos (upper rio Tocantins basin) and rio do Sono basins (middle rio Tocantins basin) in Brazil.
サイズ / 重さ / 年齢
Maturity: Lm ? range ? - ? cm
Max length : 2.7 cm SL オス/雌雄の選別がない; (Ref. 102657)
簡単な記述
検索表 | 形態学 | 形態計測学
脊つい: 31 - 32. Hyphessobrycon diastatos is distinguished from all congeners, with the exception of H. amandae, H. axelrodi, H. brumado, H. compressus, H. diancistrus, H. eilyos,H. georgettae, H. heteresthes, H. gracilior,H. milleri, H. minimus, H. negodagua, H. otrynus, H. parvellus, H. piabinhas, H. procerus, H. saizi,H. scutulatus, H. taurocephalus, and H. tukunai by lacking any concentration of chromatophores at the humeral region (vs. presence of a dark humeral spot or/and a longitudinal dark stripe extending over the humeral region). It differs from H. otrynus, H. piabinhas, and H. procerus by having 15-18 branched rays on anal fin (vs. 19 or more); from H. amandae, H. axelrodi, H. compressus, H. georgettae, H. heteresthes, and H. milleri by the absence of a dark blotch in the dorsal fin (vs. presence); from H. eilyos and H. scutulatus by having 1-3 maxillary teeth (vs. 5 or more); from H. diancistrus by having hyaline caudal-fin lobes (vs. caudal lobes with a black spot); from H. gracilior by having 4-5 longitudinal scale rows below the lateral line (vs. 3); from H. minimus by having the largest dentary teeth with 3-5 cusps (vs. 7); from H. saizi by having 14 horizontal scale rows around caudal peduncle (vs. 12) and 10-12 predorsal scales (vs. 9); from H. taurocephalus by having adipose fin (rarely absent, 1 of 294 specimens) and 15-18 branched rays on anal fin (vs. adipose fin absent and 12-15); and from H. tukunai by having 2-5 teeth in the outer premaxillary teeth row (vs. 1, rarely 2), besides the maxillary teeth with 1-3 cusps (vs. 5 or more). It is distinct from H. brumado, H. negodagua, and H. parvellus by the round and relatively well-defined dark spot on caudal peduncle in males (vs. caudal peduncle blotch with inconspicuous border in males, frequently only represented by dense pigmentation on this region) and also by the absence of white pigmentation on distal portions of first rays of dorsal, anal, and caudal fins in life (vs. presence). It further differs from H. negodagua and H. parvellus by having dark pigmentation of caudal-peduncle spot extending to base of few middle caudal-fin rays or reaching their tip, never on caudal lobes in males (vs. caudal-peduncle pigmentation spread from middle caudal-fin rays to inner portions of caudal-fin lobes in males); from H. brumado and H. parvellus by having pectoral, pelvic, and anal fins hyaline to slightly yellowish in life (vs. distinct orange- to reddish) and sexually dimorphic elongation of dorsal and anal fins in males (vs. absence). It can be further separated from H. brumado by having overall silvery body color in life (vs. orange- to reddish) and from H. negodagua by the absence of dense concentration of dark chromatophores over dorsum and posterior portion of body (vs. presence) and by the presence of adipose fin (rarely absent, 1 of 294 specimens) (vs. usually absent; and 4 of 158 with adipose fin (Ref. 102657).
Life cycle and mating behavior
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Dagosta, F.C.P., M.M.F. Marinho and P. Camelier, 2014. A new species of Hyphessobrycon Durbin (Characiformes: Characidae) from the middle rio São Francisco and upper and middle rio Tocantins basins, Brazil, with comments on its biogeographic history. Neotrop. Icththyol. 12(2):365-375. (Ref. 102657)
IUCNのレッドリストの状況は (Ref. 130435: Version 2024-1)
Human uses
用具
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インターネットの情報源
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=0.01175 (0.00498 - 0.02769), b=3.10 (2.93 - 3.27), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
栄養段階 (Ref.
69278): 3.0 ±0.3 se; based on size and trophs of closest relatives
回復力 (Ref.
120179): 高い, １５か月以下の倍増期間の最小個体群 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
