分類 / 名稱
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Teleostei >
Characiformes (Characins) >
Acestrorhamphidae (American tetras) > Acestrorhamphinae
Etymology: Astyanax: The name of Astyanax, Hector´s son in the Greek mythology (Ref. 45335).
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. Raúl Horacio Arámburu (1924–2004) was a researcher and professor of the Museo de La Plata, Buenos Aires. He was the first Professor of Ichthyology in Argentina. This species of fish is endemic to Argentina. (Ref. 128868), visit book page.
環境: 環境 / 氣候帶 / 深度上下限 / 配送範圍
生態學
; 淡水 大洋性; 深度上下限 2 - ? m (Ref. 57546). 亞熱帶的
South America: Argentina.
南美洲: 阿根廷。
大小 / 重量 / 年齡
成熟度: Lm ?  range ? - ? cm
Max length : 6.1 cm SL 雄魚/尚未辨別雌雄; (Ref. 57546)
Diagnosis: Distinct from its congeners in having a round or trapezoidal black humeral spot, dorsal to the lateral line; a branch of the infraorbital sensory canal directed ventrally, continued as a series of pores totally or partially traversing the third infraorbital; body relatively slender (31.8-37.4% SL); eye large (41.1-45.8% HL); snout short (15.5-20.9% HL); caudal peduncle relatively slender (10.3-12% SL); one pentacuspid maxillary tooth; pored lateral line scales 38-42; and anal fin rays v-vi, 23-29. The males have breeding tubercles on the head and scales, and bony hooks on all fins (Ref. 57546).
Body shape (shape guide): fusiform / normal.
鑑別: 在有一個方面不同於它的同類圓或梯形的黑色肩部的斑點,背部的到側線; 眶下知覺管的一個分支方向朝向腹側了, 繼續的當一系列的孔完全地或部份地穿越那第三眶下的; 身體相當細長的 (31.8-37.4% SL); 眼大的 (41.1-45.8% HL); 吻短 (15.5-20.9% HL); 尾柄相當細長的 (10.3-12% SL); 一個 pentacuspid 上頜骨牙齒; 有細孔的側線鱗片 38-42; 而且臀鰭棘條 v-vi, 23-29. 雄性有頭部與鱗片上繁殖小瘤, 與在所有的鰭上多骨的鉤.(參考文獻 57546)
Collected from a creek which is a relatively extensive watercourse, with sections about 50 m wide and pools over 2 m deep; vegetated with grasses and other plants, and the bottom consists of mud and clay (Ref. 57546).
採集自一條小溪是一個相當廣泛的水道, 藉由部分大約 50 公尺寬與超過 2 的水池公尺深; 以草與其他的植物植物生長的.,而且底部由泥與泥土組成。 (參考文獻 57546)
生命週期和交配行為
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
南美洲: 阿根廷。
Protogino, L., A.M. Miquelarena and H.L. López, 2006. A new species of Astyanax (Teleostei, Characiformes, Characidae), with breeding tubercles, from Paraná and Uruguay river basins. Zootaxa 1297:1-16. (Ref. 57546)
IUCN 瀕危狀態 (Ref. 130435: Version 2025-2 (Global))
近危 (NT) (B1a+2a); Date assessed: 05 September 2020
人類使用
漁業: 沒有興趣
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基於模型的估計
系統發育多樣性指數 (參考文獻 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.01047 (0.00461 - 0.02381), b=3.11 (2.93 - 3.29), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245). |
營養階層 (參考文獻 69278) |
3.0 ±0.4 se; based on size and trophs of closest relatives |
回復力 (參考文獻 120179) |
高度, 族群倍增時間少於 15個月 (Preliminary K or Fecundity.). |
釣魚的脆弱性 (Ref. 59153) |
Low vulnerability (13 of 100). 🛈 |