分類 / Names
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Teleostei >
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.
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 底中水層性. 熱帶
Asia: presently known only from the Nam Tha watershed in Louang Namtha Province and Nam Beng watershed in Oudomxai Province, Mekong basin, northern Laos.
亞洲: 目前已知只來自在 Louang Namtha 省的 Nam Tha 分水嶺而且在 Oudomxai 省，寮國北部的湄公河流域已知只來自 Nam Beng 分水嶺。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 5.2 cm SL 雄魚/尚未辨別雌雄; (Ref. 37788)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
背的軟條 (總數) : 10 - 11; 臀鰭軟條: 14 - 15; 脊椎骨: 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.
具有側線完整, 沒有眶下的突起; 大部份具有 7個分枝的背鰭鰭條與 11個分枝的臀鰭棘條。 Danio leptos 能另外地被區分有斑紋的 Danio 用它的細長身體 (體高 25.8-27.7% SL, 對超過 29.2 在大部分方面有斑紋的 Danio) 與一條彩色斑紋在於三條水平的斑紋在身體側邊上, 藉由一個中央的比較深的 (大約一個鱗片深的) 而較突出的另一個二 (P+1 與 P-1 斑紋), 與, 前面地側邊上，深色素在被分開的垂直的要素組織了被細的, 不規則的淡間隙, 出現略微類似縱帶在那有條紋的 Danio 種。 最相似的種 , D. chrysotaeniatus,有 8-9個分枝的背鰭鰭條與 12-13個分枝的臀鰭棘條, 與一些短水平線衍生的從 I-1 間隙, 前面地側邊上取代黑色斑塊。
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.
發現於在茂密森林中的一個丘陵溪流了, 大約 5-30 公分深 (大部份 5-10) ， 50-150 公分寬的，水流緩慢到中等的地方，最清澈的水域, 而且底部包含沙子到小圓石與裸露的岩石。 在一個森林水流中也生存 20-70 公分深 , 大約 4 公尺寬, 藉由在小圓石與磐石上的平穩水流與在一個次級森林中的一個河川源頭中, 很淺的 (大約 2-50 公分, 但是大部份 5-15),30-200 公分寬的，水流慢或很慢的地方, 清澈的水域而且底部包含泥到小圓石。
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔魚
亞洲: 目前已知只來自在 Louang Namtha 省的 Nam Tha 分水嶺而且在 Oudomxai 省，寮國北部的湄公河流域已知只來自 Nam Beng 分水嶺。
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)
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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=0.00457 (0.00175 - 0.01195), b=3.15 (2.92 - 3.38), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.0 ±0.4 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).
