分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Gymnotiformes (Knifefishes)
電鰻目 (Knifefishes) >
Apteronotidae (Ghost knifefishes)
無背魚科 (Ghost knifefishes) > Apteronotinae
Etymology: Apteronotus: Greek, apteros = without wings / (in this cases, fins) + Greek, noton = back (Ref. 45335); anu: Name in reference to the Añu indigenous people who lived along the shores of Lago Maracaibo (Ref. 93867).
Eponymy: The Añu indigenous people lived along the shores of Lake Maracaibo, Venezuela, in traditional houses which they built above the lake. [...] (Ref. 128868), visit book page.
Issue
Populations previously identified as A. leptorhynchus based on samples originating in various rivers draining into Lago Maracaibo in both Colombia and Venezuela were found to be A. anu based on the collecting localities (Ref. 93867).
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 底中水層性.
South America: Colombia and Venezuela.
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 27.1 cm TL 雄魚/尚未辨別雌雄; (Ref. 93867)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
臀鰭軟條: 159 - 176; 脊椎骨: 70 - 83. This species can be distinguished from its congeners by the following set of characters: A 159-176; P 14-16; C 10-13; precaudal vertebrae 18-19; total vertebrae 70-83; 5th infraorbital present as a tubular laterosensory canal segment; cartilaginous lateral ethmoid; the number of scales above the lateral line at the midbody 7-9; the number of scales along the lateral line 59-63; the extent of the mid-dorsal groove (extending seven to eight scales beyond the vertical through the posterior terminus of the anal fin); tail length 17.1-37.5% of LEA; interorbital distance 14.7-36.5% of HL. Colouration: head and body dark brown from a lateral view with the fins apparently hyaline; distinct pale, broad, longitudinal band extends from chin along dorsal midline of head and body to over dorsal filament; pectoral and anal-fin rays ranging from translucent to dark brown with interradial membranes translucent; pale band encircling base of caudal fin; caudal fin pale at base, pale to black on central portion and translucent posteriorly (Ref. 93867).
Inhabits swift current habitats over substrates of rounded stones. It was observed that this species is a voracious nocturnal predator (Ref. 93867).
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
de Santana, C.D. and R.P. Vari, 2013. Brown ghost electric fishes of the Apteronotus leptorhynchus species-group (Ostariophysi, Grymnotiformes); monophyly, major clades, and revision. Zool. J. Lin. Soc. 168(3):564-596. (Ref. 93867)
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 = No PD50 data [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00355 (0.00145 - 0.00867), b=3.06 (2.85 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.3 ±0.3 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (17 of 100).
