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Cypriniformes (Carps) >
Danionidae (Danios) > Danioninae
Etymology: Devario: Bangla/Bengali:‘debari’, local name for these fishes; also meaning ‘brother in law’ (Ref. 2031).
More on authors: Fang & Kottelat.
環境：環境 / 気候帯 / 深さの範囲 / 分布範囲
生態学
; 新鮮な水 底生の漂泳性. Tropical
Asia: presently known only from the Nam Tha watershed in Louang Namtha Province and Nam Beng watershed in Oudomxai Province, Mekong basin, northern Laos.
サイズ / 重さ / 年齢
成熟: Lm ? range ? - ? cm
Max length : 5.2 cm SL オス/雌雄の選別がない; (Ref. 37788)
簡単な記述
検索表 | 形態学 | 形態計測学
背鰭 (合計) : 10 - 11; 臀鰭: 14 - 15; 脊つい: 35 - 36. With complete lateral line, without infraorbital process; with mostly 7 branched dorsal-fin rays and 11 branched anal-fin rays. Danio leptos can be distinguished from other striped Danio by its slender body (body depth 25.8-27.7% SL, versus over 29.2 in most striped Danio) and a color pattern consisting in three horizontal stripes on the sides of the body, with the middle one (P stripe) deeper (about one scale deep) and more prominent that the other two (P+1 and P-1 stripes), and, anteriorly on the sides, the dark pigment organized in vertical elements, separated by thin, irregular light interspaces, which appears somewhat similar to the vertical bars in the barred Danio species. The most similar species, D. chrysotaeniatus, has 8-9 branched dorsal-fin rays and 12-13 branched anal-fin rays, and a few short, horizontal lines derived from the I-1 interspace, instead of dark blotches anteriorly on the side.
Body shape (shape guide): elongated; Cross section: compressed.
Found in a hill stream in dense forest, about 5-30 cm deep (mostly 5-10), 50-150 cm wide, with slow to moderate current, very clear water, and bottom consisting of sand to pebbles and rock outcrops. Occurs also in a forest stream 20-70 cm deep, about 4 m wide, with moderate current over pebbles and boulders and in a headwater in a secondary forest, very shallow (about 2-50 cm, but mostly 5-15), 30-200 cm wide, with very slow to slow current, clear water and bottom consisting of mud to pebbles.
ライフサイクルと交尾行動
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Fang, F. and M. Kottelat, 1999. Danio species from northern Laos, with descriptions of three new species (Teleostei: Cyprinidae). Ichthyol. Explor. Freshwat. 10(3):281-295. (Ref. 37788)
IUCNのレッドリストの状況は (Ref. 130435: Version 2025-2 (Global))
人間の用途
水産業: 興味がない
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=0.00589 (0.00244 - 0.01420), b=3.12 (2.91 - 3.33), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
栄養段階 (参照
69278): 3.0 ±0.4 se; based on size and trophs of closest relatives
回復力 (参照
120179): 高い, １５か月以下の倍増期間の最小個体群 (Preliminary K or Fecundity.).
漁業の脆弱性 (Ref.
59153): Low vulnerability (10 of 100).
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