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> Characiformes (Characins) > Acestrorhamphidae (American tetras) > Acestrorhamphinae
Etymology: Astyanax: The name of Astyanax, Hector´s son in the Greek mythology (Ref. 45335); bagual: The specific name bagual, from Tupi- Guarani, refers to wild horse, or what is mortal, or dangerous to mount. This expression is used mainly to convey the information that a given horse is a male reproductive in the countryside of Rio Grande do Sul State. This is allusion to the presence of bony hooks on all fins in mature males.
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.
Etymology: Astyanax: The name of Astyanax, Hector´s son in the Greek mythology (Ref. 45335); bagual: The specific name bagual, from Tupi- Guarani, refers to wild horse, or what is mortal, or dangerous to mount. This expression is used mainly to convey the information that a given horse is a male reproductive in the countryside of Rio Grande do Sul State. This is allusion to the presence of bony hooks on all fins in mature males.
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.
環境：環境 / 気候帯 / 深さの範囲 / 分布範囲 生態学
; 新鮮な水 底生の漂泳性. Subtropical
分布 領土 | 国連食糧農業機関の区域 | エコシステム | 事件 | 目的のマップ | 導入 | Faunafri
South America: Rio Taquari-Antas basin, rio Jacuí drainage, laguna dos Patos system in
Rio Grande do Sul State, Brazil.
サイズ / 重さ / 年齢
簡単な記述 検索表 | 形態学 | 形態計測学
背鰭 (合計) : 11; 脊つい: 36 - 37. Astyanax bagual is distinsguisded from all congeners occurring in rio Uruguay basin, laguna dos Patos and rio Tramandaí systems by having the following characters: first humeral spot vertically elongate with upper portion wider than lower portion and slightly directed forward
(vs. presence of oval spot with two brown vertical bars in humeral region in A. jacuhiensis, oval spot in A. laticeps, and forming a uniform wedge in A. eigenmanniorum, A. henseli, A. saguazu and A. stenohalinus; two humeral spots (vs. one in A. eigenmanniorum, A. aff. fasciatus (Cuvier), A. jacuhiensis, and A. laticeps); 24-28 branched anal-fin rays (vs. 18 or less in A. brachypterygium and A. cremnobates, 18-23 in A. procerus, and A. Xiru, 20-22 in A. paris, 16-21 in A. obscurus, 15-23 in A. laticeps, 15-20 in A. pirabitira, 20-23 in A. ojiara; 22-24 in A. douradilho; 2-4 maxillary tricuspid teeth (vs. one in A. aramburui, A. dissensus, and A. aff. fasciatus); 37-39 perforated scales along the lateral line (vs. 34-36 in A. paris); and 14 scale rows around caudal peduncle (vs. 15-16 in A. stenohalinus). In addition, A. bagual differs from A. douradilho and A. saguazu by body depth (37.9-45.9% of SL, mean = 43.3%, vs. 34.4-41.0% of SL, mean = 37.0% and 30.9-39.0% of SL, mean = 35.6%); and from A. saguazu and A. stenohalinus by preanal distance (62.4-69.1% of SL, mean = 65.5% vs. 56.0-61.2% of SL, mean = 58.7% and 58.2-62.7% of SL, mean = 59.8%), respectively; and from A. stenohalinus by the anal-fin origin located at vertical through last dorsal-fin ray insertions vs. before a vertical through last dorsal-fin ray insertions. In addition, A. bagual differs from all congeners (including the species complex A. bimaculatusand A. scabripinnis) by the following features: two vertically elongated humeral spots present (the anterior humeral spot with upper portion wider than lower portion and slightly directed forward); 24-28 branched anal-fin rays; 37-39 perforated lateral line scales; outer row of premaxilla with tricuspid teeth, inner premaxilla row with pentacuspid teeth, 2-4 maxillary tricuspid teeth; small bony hooks on all fins of mature males; conspicuous caudal peduncle spot, body depth (37.9-45.9% of SL); preanal distance (62.4-69.1% of SL); anal-fin base length (29.7-35.6% of SL); and orbital diameter (29.5-38.2% of HL) (Ref. 103251).
Body shape (shape guide): elongated.
Body shape (shape guide): elongated.
Occurs in relatively small, dark water rivers up to two meters deep, with stones and rocks on bottom, and moderate riparian vegetation. Sampling localities are around 300 meters above sea level (Ref. 103251).
ライフサイクルと交尾行動 成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
主な参考文献
参考文献のアップロード | 参考文献 | コーディネーター | 協力者
Bertaco, V.A> and A.C. Vigo, 2015. A new species of Astyanax Baird and Girard (Ostariophysi: Characidae) from the rio Taquari-Antas basin, southern Brazil. Neotrop. Ichthyol. 13(2):265-272. (Ref. 103251)
CITES
Not Evaluated
人間に対する脅威
Harmless
人間の用途
FAO - Publication: search | FishSource |
より多くの情報
ライフサイクル
繁殖
成熟
成熟度／エラ
生産力
放精
産卵群
卵
卵の開発
幼生
幼生の動力
繁殖
成熟
成熟度／エラ
生産力
放精
産卵群
卵
卵の開発
幼生
幼生の動力
解剖学
カマ
脳
オトリス
カマ
脳
オトリス
生理学
体組成
栄養素
酸素消費
水泳タイプ
泳ぐ速さ
視覚色素
フィッシュ・サウンド
病気と寄生虫
毒性（LC50）
体組成
栄養素
酸素消費
水泳タイプ
泳ぐ速さ
視覚色素
フィッシュ・サウンド
病気と寄生虫
毒性（LC50）
遺伝子の
ゲノム
遺伝子の
ヘテロ接合性
遺伝
遺伝的多様性
ゲノム
遺伝子の
ヘテロ接合性
遺伝
遺伝的多様性
用具
特記事項
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インターネットの情報源
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モデルに基づく推定値
系統多様性指数 (参照 82804): PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01047 (0.00452 - 0.02424), b=3.11 (2.93 - 3.29), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245).
栄養段階 (参照 69278): 2.9 ±0.4 se; based on size and trophs of closest relatives
回復力 (参照 120179): 高い, １５か月以下の倍増期間の最小個体群 (Preliminary K or Fecundity.).