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Cypriniformes (Carps) >
Nemacheilidae (Brook loaches)
Etymology: Schistura: Greek, schizein = to divide + Greek, oura = tail; an allusion to forked caudal fins (Ref. 45335); porthos: Named for Porthos, one of the characters of Alexandre Dumas' 'Les trois mousquetaires'.
Eponymy: Not a true eponym but one of the characters in Alexander Dumas’: The Three Musketeers, joining the two other musketeeer Schistura species (aramis, athos) all found in the Nam Ou basin, northern Laos. (Ref. 128868), visit book page.
More on author: Kottelat.
Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied
Ecologie
; zoet water benthopelagisch. Tropical
Asia: Mekong in Nam Ngiap, Nam Khan, Nam Xuang, Nam Ou and Nam Tha basins in northern Laos.
Grootte / Gewicht / Leeftijd
Maturiteit: Lm ? range ? - ? cm
Max length : 8.6 cm SL mannelijk / geslacht onbekend; (Ref. 43281)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Body massive, head broadly triangular from above; hump in front of dorsal origin in individuals over 60 mm SL; caudal peduncle very deep, 0.9-1.1 times longer than deep; anterior nostril pierced on front side of a flap; processus dentiformis present; lower lip interrupted medially; a conspicuous hard keel on back between dorsal and caudal fins and along lower edge of caudal peduncle; lateral line complete; anus about 1-2 eye diameters in front of anal-fin origin; 8.5 branched dorsal-fin rays; 5.5 branched anal-fin rays; caudal fin emarginate, with 9+8 branched rays; axillary pelvic lobe present; top of head vermiculated; body with 9-17 bars, much wider than interspaces, of quite regular width but irregularly organized, often fused two by two along dorsal midline, or upper or lower part missing; black bar at caudal-fin base complete, wide, with anterior and posterior projections where it reaches dorsal and ventral midlines; dorsal fin with 2-3 blotches along base; dark marks on fin rays of all fins (Ref. 36949).
Body shape (shape guide): elongated; Cross section: compressed.
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
Kottelat, M., 2001. Fishes of Laos. WHT Publications Ltd., Colombo 5, Sri Lanka. 198 p. (Ref. 43281)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-2 (Global))
Gevaar voor de mens
Harmless
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Schattingen op basis van modellen
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00708 (0.00323 - 0.01553), b=3.03 (2.86 - 3.20), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 3.0 ±0.3 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref.
120179): Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (Preliminary K or Fecundity.).
Kwetsbaarheid van de visserij (Ref.
59153): Low vulnerability (10 of 100).
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