分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Characiformes (Characins)
脂鯉目 (Characins) >
Characidae (Characins; tetras)
脂鯉科 (Characins; tetras) > Stethaprioninae
Etymology: Psalidodon: Greek, psalis, -idos = scissors + Greek, odous = teeth (Ref. 45335); xiru: The specific name is from Tupi-Guarani, meaning an old wise Indian. It is used mainly in the treatment personal in the countryside of Rio Grande do Sul State..
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 底中水層性.
South America: Rio Jacuí drainage, laguna dos Patos system, and upper rio Uruguay drainage in Rio Grande do Sul and Santa Catarina States in Brazil.
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 10.9 cm SL 雄魚/尚未辨別雌雄; (Ref. 94153)
簡短描述
型態特徵 | 形態測量圖
背的軟條 (總數): 11; 脊椎骨: 35 - 38. Astyanax xiru can be diagnosed from all species of Astyanax from the rio Uruguay basin and laguna dos Patos and rio Tramandaí systems by having the following characters: two humeral spots; shape of the first humeral spot is on the upper portion horizontally elongate and lower portion vertically narrow (vs. one spot in A. eigenmanniorum, A. sp. aff. fasciatus, A. jacuhiensis, and A. laticeps and ovale shape in last two species); one maxillary tooth (vs. 2-5 in A. henseli and 3-4 in A. paris); maxillary tooth tri- to pentacuspid (vs. heptacuspid in A. ojiara and A. dissensus); anal fin with 18-22 branched rays (vs. 25-30 in A. saguazu and A. stenohalinus, 23-29 in A. aramburui, 18 or less in A. brachypterygium and A. cremnobates); body depth 32.3-37.5% of SL (vs. 38.3-46.0% of SL in A. procerus); very few small hooks on anal and pelvic-fin of males (vs. absence in A. obscurus). It is most similar to A. procerus in color pattern, but it can be distinguished by the pelvic-fin length (13.6-17.1% vs. 16.1-18.7% of SL), dorsal-fin length (21.1-25.4% vs. 24.1-28.7% of SL), males with bony hooks on the anal and pelvic fins (vs. absence). The following combination of characters separate this species from all congeners including the species complex A. bimaculatus and A. scabripinnis: two conspicuous humeral spots (the first humeral spot vertically elongate with upper portion wider and lower portion narrow); a conspicuous wide lateral band; 18- 22 branched anal-fin rays; 19-24 gill rakers on first branchial arch; 37-40 perforated lateral line scales, 4-5 scale row between lateral line and pelvic-fin origin; outer row of premaxilla with pentacuspid teeth, inner premaxilla row with heptacuspid teeth, one maxillary teeth tri- to pentacuspid; very few small hooks on anal and pelvic fin of males, conspicuous caudal spot, head length 24.2-27.3% of SL, body depth 32.5-37.5% of SL, interorbital width 29.8-34.2% of HL, orbital diameter 32.1-36.6% of HL, head length 24.2-27.3% of SL, and anal-fin base length 23.3-27.4% of SL (Ref. 94153)
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
Terán, G.E., M.F. Benitez and J.M. Mirande, 2020. Opening the Trojan house: phylogeny of Astyanax, two genera and resurrection of Psalidodon (Teleostei: Characidae). Zool. J. Lin. Soc. 190(4):1217-1234. (Ref. 123753)
人類使用
更多資訊
俗名同種異名新陳代謝捕食者生態毒物學繁殖成熟度產卵場產卵群集孕卵數卵卵發育
年龄/大小成長長度-重量長度-長度長度-頻率形態測量圖型態特徵仔魚稚魚動力學入添量豐度BRUVS
參考文獻養殖養殖資訊品種遺傳學Electrophoreses遺傳率疾病加工NutrientsMass conversion
合作者照片Stamps, Coins Misc.聲音神經毒速度泳型鰓區Otoliths腦重體重比眼睛色素
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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=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.0 ±0.3 se; based on size and trophs of closest relatives
回復力 (Ref.
120179): 高度, 族群倍增時間少於 15個月 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
