分類 / Names
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Characiformes (Characins) >
Characidae (Characins; tetras) > Stethaprioninae
Etymology: Astyanax: The name of Astyanax, Hector´s son in the Greek mythology (Ref. 45335); tehuacanensis: Named for its type locality, Río Salado south of Tehuacán in central Mexico. An adjective.
Eponymy: Astyanax was the son of Hector in Greek mythology. See Homer’s Iliad for details. The reasoning for its use for a genus of characins is not explained. (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
生態学
; 新鮮な水 底生の漂泳性. Tropical
Central Ameica: endemic to the Río Salado (Gulf of Mexico versant), south of Tehuacán in central Mexico.
サイズ / 重さ / 年齢
Maturity: Lm ? range ? - ? cm
Max length : 7.5 cm SL オス/雌雄の選別がない; (Ref. 118583)
簡単な記述
検索表 | 形態学 | 形態計測学
背鰭 (合計) : 9; 臀鰭: 18 - 23; 脊つい: 32 - 33. Astyanax tehuacanensis is distinguished from other congenes in central Mexico by the following characters: rays on anal fin, mean fewer than 24 (vs. mean 24 or more in A. aeneus); total gill rakers, mean fewer than 20 (vs. mean 22 or more in A. finitimus); head shorter, mean 21.9% SL (vs. mean 23.8% or more); snout shorter, mean 3.3% SL (vs mean 4.2% or more); interorbital, mean 8% SL (mean 9-10% SL in A. acatlanensis and A. mexicanus); pectoral fin shorter, mean 19.3% SL (vs. mean ca. 21% in A. acatlanensis and A. mexicanus); anterior fontanel longer (vs. shorter); infraorbital II, triangular with an angled base (vs. base convex in A. acatlanensis, A. aeneus and A. mexicanus); epibranchial III, distal segment straight (vs. curved in A. finitimus and A. mexicanus); first dorsal pterygiophore, dorsal edge angled (vs. curved in A. mexicanus) (Ref. 118583).
Life cycle and mating behavior
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Schmitter-Soto, J.J., 2017. A revision of Astyanax (Characiformes: Characidae) in Central and North America, with the description of nine new species. J. Nat. Hist. 51(23/24):1-94. (Ref. 118583)
IUCNのレッドリストの状況は (Ref. 130435: Version 2024-1)
Human uses
用具
特記事項
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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=0.01096 (0.00493 - 0.02437), 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): 2.9 ±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).
