分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Siluriformes (Catfishes)
鯰形目 (Catfishes) >
Akysidae (Stream catfishes)
河鯰科 (Stream catfishes) > Akysinae
Etymology: Akysis: Derived from Greek, a = without + Greek, kysthos = bladder (Ref. 45335); galeatus: Specific name from the Latin galeatus (helmeted), in reference to the the body ridges on the head.
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 居於水底的.
Asia: Way Gedongwani, a tributary of Way Sekampung in Sumatra, Indonesia.
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 2.8 cm SL 雄魚/尚未辨別雌雄; (Ref. 75761)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
背棘 (總數) : 1; 背的軟條 (總數) : 5; 臀鰭軟條: 8 - 10; 脊椎骨: 30 - 33. Diagnosed by the following characters: space between anterior nostril and base of nasal barbel about equal to nostril diameter; anterior and posterior nostrils relatively small with diameter less than that of eye; anterior nostril situated at end of short tube; jaws subequal (lip of upper jaw projecting past lower jaw); caudal fin emarginate (not strongly forked); eye dorsolateral, not protruding above head when viewed from side; large depression below eye; posterior edge of pectoral spine with 1-3 small serrae (much less than half width of spine); obvious concavity on top of head extending from anterior median fontanel to posterior median fontanel with body ridge along either side formed by medial edges of frontals and supraoccipitals; ridges converge posteriorly at elevated supraoccipital process (Ref. 75761).
Inhabits gravel-sandy run in a medium-sized turbid river with average width of 40 m (Ref. 75761).
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
Page, L.M., R.K. Hadiaty, J.A. López, I. Rachmatika and R.H. Robins, 2007. Two new species of the Akysis variegatus species group (Siluriformes: Akysidae) from Southern Sumatra and a redescription of Akysis variegatus Bleeker, 1846. Copeia 2007(2):292-303. (Ref. 75761)
IUCN 瀕危狀態 (Ref. 130435: Version 2024-1)
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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=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.3 ±0.5 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
