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Teleostei >
Characiformes (Characins) >
Stevardiidae (Stevardiids) > Creagrutinae
Etymology: Creagrutus: Greek, kreagreytos, -os, -on = to tear, to rip up the flesh (Ref. 45335).
Eponymy: This species is named after the Tuyuka tribe of the Colombia-Brazil border region. (Ref. 128868), visit book page.
More on authors: Vari & Lima.
Environment: milieu / climate zone / 深度上下限 / distribution range
生态学
; 淡水 居于水底的. 热带
South America: Rio Uaupés basin in Brazil.
南美洲: 在巴西的 Rio Uaupes 流域。
大小 / 重量 / 年龄
成熟度: Lm ? range ? - ? cm
Max length : 6.8 cm SL 雄鱼/尚未辨别雌雄; (Ref. 52414)
简单描述
检索表 | 型态特徵 | 形态测量图
背的软条 (总数) : 10; 臀鳍软条: 14 - 15; 脊椎骨: 39 - 41. It differs from Creagrutus amoenus and Creagrutus kunturus in its lack of the series of dark midlateral spots on the body that progressively coalesce ontogenetically to sometimes form a midlateral stripe in adults of the latter two species and in the distance from the snout to the anal fin origin (27.2-30.7 vs 33.8-38.8 and 30.8-34.0, respectively), distance from the snout to the pelvic fin insertion (22.2-25.6 vs 29.0-35.6 and 27.9-31.6, respectively), and the caudal peduncle depth (8.9-9.8 vs. 12.2-13.8 and 11.1-12.1, respectively). It further differs from Creagrutus amoenus in the number of vertebrae (39-41 with 39 in four specimens and 40 or 41 in 10 specimens vs 35-39 with 36-38 in 34 specimens and 39 in only one of 36 radiographed specimens, respectively, and from Creagrutus kunturus in the number of median predorsal scales (9 or 10 vs 12, respectively).
它有别于 Creagrutus amoenus 与 在它的 Creagrutus kunturus 没有成列的深色侧面中央的斑点在渐进地个体发生地合并有时后者形成一个侧面中央的斑纹当成鱼时二个种的身体上与在遥远之处从吻部到臀鳍起源 (27.2-30.7 相对 33.8-38.8 与 30.8-34.0, 分别地), 来自吻部到腹鳍嵌入 (22.2-25.6 相对 29.0-35.6 与 27.9-31.6, 分别地) 的距离 , 与尾梗深度.(8.9-9.8 vs.12.2-13.8 與 11.1-12.1, 分別地) 它進一步在脊椎骨的數字中有別於 Creagrutus amoenus(39-41 具有 39 在四件標本與 40 或 41/10 的標本中相對 35-39 具有 36-38/34 的標本與 39 在 36件被拍 X 光線照片的標本的只有一個中, 分別地, 與從 Creagrutus kunturus 在中央前背的鱗片的數字中.(9 或 10 相對 12, 分別地)
Occurs along the edge of a large pool immediately below a small fall preceded upstream by a long series of rapids and in a clear water stream with sandy bottom (Ref. 52414). Observed swimming close to the substrate in small schools of four to six fish (Ref. 52414). Feeds on benthic aquatic insect larvae (Ref. 52414).
生存沿着大水池的边缘紧邻向上游被一个长的成列急流之前的小的秋天下方与在一个清澈的水域水流中且底部为沙地的地方.(参考文献 52414) 观察游泳接近四到六个鱼被形成小群鱼群的底部。 (参考文献 52414) 吃底栖的水生昆虫幼生。 (参考文献 52414)
Life cycle and mating behavior
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
南美洲: 在巴西的 Rio Uaupes 流域。
Vari, R.P. and F.C.T. Lima, 2003. New species of Creagrutus (Teleostei: Characiformes: Characidae) from the Rio Uaupés basin, Brazil. Copeia 2003(3):583-587. (Ref. 52414)
世界自然保护联盟红皮书 (Ref. 130435: Version 2025-1)
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Estimates based on models
Phylogenetic diversity index (参考文献
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00851 (0.00408 - 0.01776), b=3.02 (2.85 - 3.19), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
营养阶层 (参考文献
69278): 3.2 ±0.40 se; based on food items.
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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