Classificação / Names
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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
Ecologia
; Água doce bentopelágico. Tropical
Asia: upper Nam Chat in central Laos.
Tamanho / Peso / Idade
Maturity: Lm ? range ? - ? cm
Max length : 6.2 cm SL macho/indeterminado; (Ref. 116770)
Descrição suscinta
Chaves de identificação | Morfologia | Morfometria
Raios dorsais (total) : 13 - 15; Raios anais : 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).
Ciclo de vida ou comportamento de acasalamento
Maturidade | Reprodução | Desova | Ovos | Fecundidade | Larvas
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)
Status na Lista Vermelha da UICN (Ref. 130435: Version 2024-2)
Ameaça para os humanos
Harmless
Uso pelos humanos
Ferramentas
Relatórios especiais
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Estimates based on models
Índice de diversidade filogenética (Ref.
82804): PD
50 = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01230 (0.00556 - 0.02722), b=3.03 (2.86 - 3.20), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Nível Trófico (Ref.
69278): 2.9 ±0.2 se; based on size and trophs of closest relatives
Resiliência (Ref.
120179): Elevada, tempo mínimo de duplicação da população menor que 15 meses (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
