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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); pirauba: Name came from the Tupi language, 'pira' for fish and 'aúba' for false, referring to the apparent mimicry of the new species with Jupiaba; noun in apposition.
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.
محیط زیست: محیط زیست / منطقه آب و هوایی / تغييرات عمق / محدوده توزیع
بوم شناسي
; آب شيرين سطح زی. Tropical
South America: Brazil.
اندازه / وزن / سن
بلوغ: Lm ?  range ? - ? cm
Max length : 9.9 cm SL جنس نر / بدون خواص جنسي; (Ref. 83482)
توصيف مختصر
كليدهاي شناسايي | ريخت شناسي | ريخت ستجي بوسيله انداره گيري
شعاع نرم باله پشتي (کل) : 8 - 9; شعاع نرم باله مخرجي: 22 - 26. This species is distinguished from all its congeners, except Moenkhausia moisae by having more scales in lateral series 43-47 (vs. 23-41); it differs from M. moisae mainly by its colour pattern, which consists of one humeral blotch (vs. two), a moderately sized dark midlateral stripe (vs. narrow dark midlateral line), asymmetrical caudal blotch, continuous anteriorly with midlateral stripe and extending posteriorly to margins of four or five middle caudal-fin rays, although less pigmented on this posterior portion (vs. conspicuous, regularly rounded and symmetrical dark blotch, restricted to end of caudal peduncle and base of caudal fin, not continuous with a midlateral line and not extending to the entire length of median caudal-fin rays); scales along mid-dorsal line between tip of supraoccipital process and origin of dorsal fin forming a regular series (vs. predorsal line of scales irregular, not forming a median series) (Ref. 83482).
Body shape (shape guide): short and / or deep.
Collected in clear-water creeks and small tributaries of larger rivers, such as the Rio Culuene, Rio Curuá and Rio Teles Pires. Usually found in shadowed pools between rapids with well-preserved riparian vegetation. Stomachs of 5 specimens from Tapajós and Xingu basins had a predominance of allochthonous items, adults of terrestrial insects (Coleoptera, Curculionidae; Hymenoptera, Formicidae; Diptera), insect aquatic larvae (Trichoptera, Ephemeroptera; Diptera, Chironomidae), fish remains (Characiformes) and plant fragments (Ref. 83482).
چرخه زندگی و رفتار جفتگیری
بلوغ | تولید مثل | تخم ریزی | تخم ها | باروری | توزاد ( لارو)
Zanata, A.M., J.L.O. Birindelli and C.R. Moreira, 2010. New species of Moenkhausia Eigenmann (Characiformes: Characidae) from Rio Xingu and Rio Tapaj´os basins, Brazil, with comments on a putative case of polymorphic Batesian mimicry. J. Fish Bio. 75(10):2615-2628. (Ref. 83482)
وضعيت در فهرست قرمز IUCN (Ref. 130435: Version 2025-2 (Global))
خطر برای انسان ها
Harmless
استفاده انسانی
ابزارها
گزارش های ويژه
بارگيری XML
منابع اينترنتي
تخمینها بر اساس مدلها
شاخص تنوع فیلوژنتیکی (مرجع 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=0.01905 (0.00846 - 0.04293), b=3.01 (2.83 - 3.19), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245). |
سطح تروفیک (مرجع 69278) |
2.9 ±0.4 se; based on size and trophs of closest relatives |
آسیبپذیری ماهیگیری (Ref. 59153) |
Low vulnerability (21 of 100). 🛈 |