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Siluriformes (Catfishes) >
Akysidae (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 / Klimaatzone / Diepte / distribution range
Ecologie
; zoet water benthopelagisch. Tropical
Asia: Tasek Bera in Malaysia.
Grootte / Gewicht / Leeftijd
Maturiteit: Lm ? range ? - ? cm
Max length : 3.0 cm SL mannelijk / geslacht onbekend; (Ref. 30226)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Dorsale zachte stralen (totaal) : 5 - 6; Anale zachte stralen: 8 - 10; Wervels: 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).
Body shape (shape guide): elongated.
Recorded from small slow-flowing forested streams with acidic water (Ref. 84801).
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
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)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-1)
Gevaar voor de mens
Harmless
Gebruik door de mens
Tools
Speciale rapporten
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Internetbronnen
Estimates based on models
Fylogenetische diversiteitsindex (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).
Trofisch niveau (Ref.
69278): 3.3 ±0.6 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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