分類 / 名前
共通名の | 類義語 | Catalog of Fishes(部類, 種) | ITIS | CoL | WoRMS | Cloffa
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Characiformes (Characins) >
Stevardiidae (Stevardiids) > Creagrutinae
Etymology: Creagrutus: Greek, kreagreytos, -os, -on = to tear, to rip up the flesh (Ref. 45335); yudja: Named after the Juruna indigenous people, self-named Yudjá (which means “keeper of the river”).
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. Tropical
South America: Brazil.
サイズ / 重さ / 年齢
成熟: Lm ? range ? - ? cm
Max length : 3.0 cm SL オス/雌雄の選別がない; (Ref. 122128)
簡単な記述
検索表 | 形態学 | 形態計測学
背鰭 (合計) : 8; 臀鰭: 7 - 9; 脊つい: 36. This species is distinguished from its congeners by the following set of characters: absence of infraorbital 6 (vs. present); differs from its congeners, except for C. cracentis, C. maxillaris, C. melanzonus, C. phasma, C. runa, C.veruina, by having a shallower body 13.7-19.2% (vs. > 20%); differs from C. cracentis, C. maxillaris, C. phasma, C. runa, C.veruina by having a lower number of perforated lateral line scales 34-36 (vs. > 37); differs from C. melanzonus by having a higher number of post-anal scales 4-6 (vs. 2) (Ref. 122128).
Cross section: oval.
ライフサイクルと交尾行動
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Netto-Ferreira, A.L. and C.R. Moreira, 2018. New species of Creagrutus (Ostariophysi; Characiformes; Characidae) from the Rio Xingu drainage, Brazil. Zootaxa 4375(2):250-256. (Ref. 122128)
IUCNのレッドリストの状況は (Ref. 130435: Version 2025-2 (Global))
絶滅危惧 (EN) (B2ab(iii)); Date assessed: 23 November 2020
人間の用途
用具
特記事項
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インターネットの情報源
モデルに基づく推定値
系統多様性指数 (参照
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00851 (0.00401 - 0.01809), b=3.02 (2.85 - 3.19), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
栄養段階 (参照
69278): 2.7 ±0.1 se; based on size and trophs of closest relatives
漁業の脆弱性 (Ref.
59153): Low vulnerability (10 of 100).
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