Classification / Names
Populärnamn | synonymer | Catalog of Fishes(Släkte, Arter) | ITIS | CoL | WoRMS | Cloffa
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Cypriniformes (Carps) >
Cyprinidae (Minnows or carps) > Cyprininae
Etymology: Carassius: Latinization of , karass, karausche, European crucian carp (Ref. 45335); praecipuus: Derived from the Latin adjective praecipuus, -a, -um, means ‘which is not common’, in allusion to the unexpected presence of a Carassius in the Mekong drainage and the very low dorsal-fi n ray, lateral line scale and gill-raker counts..
Environment: milieu / climate zone / depth range / distribution range
Ekologi
; sötvatten bentopelagisk. Tropical
Asia: upper Nam Chat in central Laos.
Size / Vikt / Age
Maturity: Lm ? range ? - ? cm
Max length : 6.2 cm SL hane/ej könsbestämd; (Ref. 116770)
Short description
Bestämningsnycklar | Morfologi | Morfometri
Mjukstrålar i ryggfenan (totalt) : 13 - 15; Mjukstrålar i analfenan: 8. Carassius praecipuus is diagnosed from all other species of Carassius by having the origin of the anal fin located behind a vertical through the base of last dorsal-fin ray (vs. under dorsal-fi n base), 9-11½ branched dorsal-fin rays (vs. 11-21½), 25-27 +1 scales on lateral line (vs. 27-36 [total]), and 20-21 total gill rakers (vs. 23-128) (Ref. 116770).
Inhabits stream with 2-4 m width, about 30-50 cm depth, up to about 1 m depth in one of the curves, moderate current, and bottom consisted of gravel and pebble, with some areas cogvered by a thin layer of sediments. Occurs mainly in the deepest areas, under the roots of overhanging trees and bushes. Other fish species found were Opsarius pulchellus (Cyprinidae), Schistura coruscans, S. defectiva, S. personata, S. quaesita (Nemacheilidae), Oreoglanis sp. (Sisoridae) and Rhinogobius mekongianus (Gobiidae). Sexual maturity is attained at around 60-70 mm SL (Ref. 116770).
Life cycle and mating behavior
Maturities | Reproduktion | Spawnings | Egg(s) | Fecundities | Larver
Kottelat, M., 2017. Carassius praecipuus, a dwarf new species of goldfish from the Mekong drainage in central Laos (Teleostei: Cyprinidae). Revue suisse de Zoologie 124(2):323-329. (Ref. 116770)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
Verktyg
Special reports
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01175 (0.00548 - 0.02519), b=3.00 (2.82 - 3.18), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trofisk nivå (Ref.
69278): 2.9 ±0.2 se; based on size and trophs of closest relatives
Resiliens (Ref.
120179): Hög, lägsta populationsfördubblingstid mindre än 15 månader (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
