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: alfredi: Named for Eric R. Alfred, for his pioneering work on the freshwater fish fauna of Peninsular Malaysia.
Eponymy: Eric Ronald Alfred (1931–2019) was an ichthyologist and Curator of the Raffles Museum, Singapore (1957–1967). [...] (Ref. 128868), visit book page.
More on authors: Ng & Kottelat.
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 底中水層性. 熱帶
Asia: Tasek Bera in Malaysia.
亞洲: 在馬來西亞的 Tasek Bera。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 3.0 cm SL 雄魚/尚未辨別雌雄; (Ref. 30226)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
背的軟條 (總數) : 5 - 6; 臀鰭軟條: 8 - 10; 脊椎骨: 32 - 33. Distinguished from all its congeners by possessing tubercles with poorly-demarcated, indistinct margins (versus tubercles with well-demarcated and distinct margins) and the following combination of characters: head width 20.3-25.0% SL; body depth at anus 11.3-14.7% SL; depth of caudal peduncle 5.7-7.3% SL; pectoral-fin length 23.1-28.9% SL; interorbital distance 34-39% HL; eye diameter 7-11% HL; length of nasal barbel 29-65% HL; length of maxillary barbel 122-144% HL; length of outer mandibular barbel 88-134% HL; color pattern of dark-colored patches on a predominantly light-colored body (versus predominantly dark-colored body with light-colored patches in its congeners); and caudal fin strongly forked (Ref. 30226).
藉由用貧乏定界線又不明顯的邊緣 (對小瘤以很好定界線與明顯的邊緣) 與下列的組合特徵持有小瘤與它所有的同類區分了: 頭部寬度 20.3-25.0% SL; 在肛門 11.3-14.7% SL 的體高; 尾柄 5.7-7.3% SL 的深度; 胸鰭長度 23.1-28.9% SL; 眼間距 34-39% HL; 眼直徑 7-11% HL; 鼻觸鬚 29-65% HL 的長度; 顎觸鬚 122-144% HL 的長度; 外部顎的觸鬚 88-134% HL 的長度; 深色區塊的彩色斑紋一之上主要顏色較淡身體;(對主要深色的身體有顏色較淡區塊在它的同類中) 而且尾鰭強烈地分岔.(參考文獻 30226)
Recorded from small slow-flowing forested streams with acidic water (Ref. 84801).
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
亞洲: 在馬來西亞的 Tasek Bera。
Ferraris, C.J. Jr., 2007. Checklist of catfishes, recent and fossil (Osteichthyes: Siluriformes), and catalogue of siluriform primary types. Zootaxa 1418:1-628. (Ref. 58032)
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 = 0.5001 [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 ±0.6 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
