分類 / 名前
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Siluriformes (Catfishes) >
Akysidae (Stream catfishes) > Akysinae
Etymology: Akysis: Derived from Greek, a = without + Greek, kysthos = bladder (Ref. 45335); fontaneus: The specific epithet comes from the Latin adjective fontaneus, meaning of or from a spring, in reference to the nature of a type locality (a spring-fed stream).
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; pH range: 6.8 - ?; 深さの範囲 0 - 2 m (Ref. 80541). Tropical; 2°S - 3°S, 102°E - 103°E
Asia: Indonesia. Presently known only from the type locality in the Batang Hari drainage in central Sumatra (Ref. 80541).
サイズ / 重さ / 年齢
成熟: Lm ?  range ? - ? cm
Max length : 2.4 cm SL オス/雌雄の選別がない; (Ref. 80541)
簡単な記述
検索表 | 形態学 | 形態計測学
背面の脊椎 (合計) : 1; 背鰭 (合計) : 5; 肛門の骨: 3; 臀鰭: 7; 脊つい: 33. Akysis fontaneus is distinguished from congeners by a combination of the following characters: weakly emarginate caudal fin, convex dorsal surface of neurocranium making predorsal profile appear steeply sloping, presence of 4 large serrations on posterior edge of pectoral spine that are more than half width of spine, predorsal length 34.5% SL, pectoral-fin length 21.7% SL (not reaching pelvic-fin origin), length of adipose-fin base 18.7% SL and interorbital distance 42.3% HL (Ref. 80541).
Body shape (shape guide): elongated; Cross section: compressed.
ライフサイクルと交尾行動
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Ng, H.H., 2009. Akysis fontaneus, a new species of catfish (Siluriformes: Akysidae) from Sumatra. Zootaxa 1973:41-50. (Ref. 80541)
IUCNのレッドリストの状況は (Ref. 130435: Version 2025-2 (Global))
人間の用途
用具
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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) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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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). |
栄養段階 (参照 69278) |
3.2 ±0.5 se; based on size and trophs of closest relatives |
漁業の脆弱性 (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |