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Perciformes/Percoidei (Perchs) >
Percidae (Perches) > Etheostomatinae
Etymology: Percina: Latin, diminutive of perch = perch (Ref. 45335); williamsi: Named after James D. Williams, a contemporary ichthyologist, malacologist and natural historian extraordinaire.
Eponymy: Dr James ‘Jim’ David Williams (d: 1941) is a biologist and conservationist who worked in the Department of the Interior at the US Florida Fish & Wildlife Service and US Geological Survey (1974–2006), Florida Fish & Wildlife Conservation Commission [...] (Ref. 128868), visit book page.
Entorno: milieu / zona climática / rango de profundidad / gama de distribución
Ecología
; agua dulce bentopelágico. Subtropical
North America: restricted to the upper Tennessee River drainage of Tennessee, Virginia and North Carolina, USA.
Tamaño / Peso / Edad
Madurez: Lm ?  range ? - ? cm
Max length : 9.1 cm SL (female)
Descripción breve
Claves de identificación | Morfología | Morfometría
Espinas dorsales (total) : 11 - 16; Radios blandos dorsales (total) : 12 - 13; Espinas anales: 2; Vértebra: 44 - 45. Distinguished from all congeners, except Percina macrocephala, by having a sickle-shaped suborbital bar and a black bar subtending a medial black spot on the caudal-fin base. Differs from Percina macrocephala by having larger scales (usually 24-26 scales around the caudal peduncle vs. 27-31), 21-23 transverse scales (vs. 23-26), and 70-77 lateral scales (vs. 76-86). Has values for the combination of caudal peduncle, transverse and lateral scales and lateral scales usually 120-129 (vs. 128-141); has shorter snout on average; snout ranges from 20-28% of HL compared to 24-31 in Percina macrocephala (Ref. 75766).
Body shape (shape guide): elongated.
Adfults inhabit flowing pools over rocky, sandy or silty substrates in clear creeks or small rivers (Ref. 75766). They occur most often near woody debris, vegetation such as water willow, or large boulders (Ref. 75766). Spawning takes place in gravel shoals in later winter (Ref. 75766). Migratory behaviour is undetermined (Ref. 126106).
Ciclo vital y comportamiento de apareamiento
Madurez | Reproducción | Puesta | Huevos | Fecundidad | Larva
Page, L.M. and T.J. Near, 2007. A New darter from the upper Tennessee River drainage related to Percina macrocephala (Percidae: Etheostomatinae). Copeia 2007(3):605-613. (Ref. 75766)
Situación en la Lista Roja de la UICN (Ref. 130435: Version 2025-2 (Global))
Vulnerable (VU) (B1ab(ii,iii,iv,v)+2ab(ii,iii,iv,v)); Date assessed: 20 April 2012
Amenaza para el ser humano
Harmless
Usos humanos
Herramientas
Informes especiales
Descargar XML
Fuentes de Internet
Estimaciones basadas en modelos
Índice de diversidad filogenética (Referencia 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00575 (0.00270 - 0.01228), b=3.13 (2.95 - 3.31), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Nivel trófico (Referencia 69278) |
3.4 ±0.4 se; based on size and trophs of closest relatives |
Resiliencia (Referencia 120179) |
Alto, población duplicada en un tiempo mínimo inferior a 15 meses (Preliminary K or Fecundity.). |
Vulnerabilidad pesquera (Ref. 59153) |
Low vulnerability (25 of 100). 🛈 |