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Characiformes (Characins) >
Characidae (Characins; tetras) > Stevardiinae
Etymology: Hemibrycon: Greek, hemi = half + Greek, bryko = to bite (Ref. 45335); divisorensis: Named for its type locality, Zona Reservada Sierra del Divisor; noun in apposition..
Environment: milieu / climate zone / depth range / distribution range
生態学
; 新鮮な水 外洋の. Tropical
South America: Río Ucayali drainage in Peru.
サイズ / 重さ / 年齢
Maturity: Lm ?  range ? - ? cm
Max length : 6.8 cm SL オス/雌雄の選別がない; (Ref. 75799); 8.2 cm SL (female)
簡単な記述
形態学 | 形態計測学
背鰭 (合計): 8; 臀鰭: 25 - 28; 脊つい: 38 - 39. This species is distinguished from its congeners by the following characters: a wide black asymmetrical spot covering base of caudal-fin rays, extending along entire length of caudal-fin rays 9 to 12-13 (except H. surinamensis); a black band in the lower half of the caudal peduncle from the region above the last anal-fin rays to the caudal-fin base; 4-5 scale rows below lateral line (vs. 5-9) except from H. mikrostiktos and H. surinamensis (Ref. 75799); differs from H. mikrostiktos by the number of branched anal-fin rays (24-30 vs. 18-21), and from H. surinamensis by the number of scale sheath along anal-fin base (17-22 vs. 12-17), and by the number of cusps in the inner row of the premaxilla teeth (5-7 vs. 4-5) (Ref. 85819).
Type specimens were collected at the tributaries of río Tapiche which are about 2-3 m wide with crystalline water, 0.3-0.5 m deep, medium water current, sandy substrate, and with moderate amount of riparian vegetation. This species has a typical aquasperm with a spherical to slightly ovoid nucleus , suggesting that the species is non-inseminating. It was not possible to verify the presence of spermatozoa in the ovaries due to the lack of mature females. Mature males possess bony hooks on rays of all fins, except the caudal fin; the presence of which may represent a secondary sexual character (Ref. 75799).
Life cycle and mating behavior
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Bertaco, V.A. and L.R. Malabarba, 2010. A review of the Cis-Andean species of Hemibrycon Günther (Teleostei: Characiformes: Characidae: Stevardiinae), with description of two new species. Neotrop. Ichthyol. 8(4):737-770. (Ref. 85819)
Human uses
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Age/Size成長体長-重さLength-length体長組成形態計測学形態学幼生幼生の動力補充豊度BRUVS
参考文献水産養殖水産養殖の紹介緊張遺伝子のElectrophoreses遺伝病気行列NutrientsMass conversion
協力者画像Stamps, Coins Misc.音シガテラ(食中毒の名前)速度泳ぐ 型式カマOtoliths脳視覚
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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=0.00813 (0.00372 - 0.01775), b=3.09 (2.90 - 3.28), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
栄養段階 (Ref.
69278): 3.0 ±0.4 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).