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) >
Lebiasinidae (Pencilfishes)
鮰脂鯉科 (Pencilfishes) > Lebiasininae
Etymology: hoffmannorum: Named for Peter Hoffmann.
Eponymy: Dr Patrick Henri de Rham (d: 1936) is a Swiss zoologist, botanist, ichthyologist and aquarist in Lausanne, and was Expert Ecologist to the Coopération Technique Suisse. He is a Director of the Aquatic Conservation Network. (Also see Patrick and Rham) Peter Hoffmann of Salzgitter, Germany and Dr Martin Hoffmann of Hanover, Germany, collected the type specimens and, according to the etymology, it was they: “ …who managed to collect and acclimate the species and gave us precious information about [...] (Ref. 128868), visit book page.
More on authors: Géry & Zarske.
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 大洋性. 熱帶
South America: Mazaruni River, Guyana.
南美洲: 蓋亞那。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 6.1 cm SL 雄魚/尚未辨別雌雄; (Ref. 47610)
背棘 (總數) : 2; 背的軟條 (總數) : 8; 臀鰭軟條: 9 - 10. Elongated body (greatest depth 4.60-5.45 in SL) with a narrow caudal peduncle; symmetrical caudal fin and a dorsal fin far backward. Transverse scales from dorsal to pelvic, 6 or 6.5; predorsal scales 15.5 or 16. Mouth somewhat superior with a short maxilla (apparent length 4.5-5.5 in HL), not quite reaching the level of the eye's front margin. Eyes relatively large. A longitudinal black band surmounted by a light line, from opercle to base of middle caudal rays (Ref. 47610).
延長的身體 (最大的高度 4.60-5.45 分之一標準體長) 具有一個狹窄的尾柄; 對稱的尾鰭與一個背鰭遠的向後地。 橫跨的鱗片從背部的對腹鰭,6 或 6.5; 前背的鱗片 15.5 或 16. 嘴略微上方的具有一個短的顎骨 (明顯的長度 4.5-5.5個 HL比率), 不完全達到眼的在前面的邊緣的水平。 眼相當大的。 從鰓蓋到中央尾部的鰭條的基底,一條縱向的黑色條紋頂上有一條淡的線了。 (參考文獻 47610)
A shy species (probably the most timorous pencil-fish species), living mainly on the surface and hidden, when possible, under a floating leaf or other hiding possibility. Swims actively, in a fitful manner, the moving of the pectorals is alternative, not symmetric. In captivity, accepts all foods, including dry ones, but only on the surface, neglecting what falls on the bottom. No peculiar nocturnal coloration; no direct courtship was yet observed, only short hunts against each other (within and between sexes) without real fights (Ref. 47610).
一個害羞的種 (可能最膽怯的鉛筆-魚的種), 生活主要在表面與隱藏的, 當可能的時候,在一片漂浮的葉或其他的藏可能性下面。 以斷斷續續的方法, 活躍地游動,胸鰭的移動是交替的, 不是對稱。 在繁殖場, 接受包括乾的一些所有的食物但是只有在表面上，忽略落在底部的東西。 沒有特殊的夜行色; 沒有直接的求偶期仍然被觀察, 沒有真正的戰鬥只短暫的爭鬥對抗彼此 (同性或異性間).(參考文獻 47610)
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
南美洲: 蓋亞那。
Géry, J. and A. Zarske, 2002. Derhamia hoffmannorum gen. et sp. n. - a new pencil fish (Teleostei, Characiformes, Lebiasinidae), endemic from the Mazaruni River in Guyana. Zool. Abh., Staat. Mus. Tierk. Dresden (52):35-47. (Ref. 47610)
IUCN 瀕危狀態 (Ref. 130435: Version 2024-2)
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00692 (0.00273 - 0.01753), b=3.05 (2.83 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.4 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
