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Percina sciera (Swain, 1883)

Dusky darter
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Percina sciera
Male picture by Tumlison, R.

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> Perciformes/Percoidei (Perchs) > Percidae (Perches) > Etheostomatinae
Etymology: Percina: Latin, diminutive of perch = perch (Ref. 45335);  sciera: sciera meaning dusky (Ref. 10294).

Environment: milieu / climate zone / depth range / distribution range Ecologie

; zoet water benthopelagisch; pH range: 6.8 - 7.8; dH range: 8 - 18. Temperate; 10°C - 24°C (Ref. 12468); 41°N - 29°N

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North America: Mississippi River basin from Ohio and West Virginia to eastern Illinois and south to Louisiana in the USA; Gulf drainages from Black Warrior River in Alabama to Guadalupe River in Texas, USA.

Lengte bij maturiteit / Grootte / Gewicht / Leeftijd

Maturity: Lm ?, range 5 - ? cm
Max length : 13.0 cm TL mannelijk / geslacht onbekend; (Ref. 5723); common length : 7.5 cm TL mannelijk / geslacht onbekend; (Ref. 12193); max. gerapporteerde leeftijd: 4 Jaren (Ref. 12193)

Biologie     Verklarende woordenlijst (bv. epibenthic)

Inhabit fast gravel runs, sometimes riffles, of creeks and small to medium rivers. Often found near brush (Ref. 5723, 10294). Young are found in shallower gravel riffles (Ref. 7043). Juveniles feed on midge and blackfly larvae; adults consume caddisfly and mayfly larvae (Ref. 10294). Males are larger and darker in color during breeding (Ref. 69400).

Levenscyclus en paargedrag Maturities | Voortplanting | Spawnings | Egg(s) | Fecundities | Larven

While in captivity, males exhibit tail-beating while infront of a large female aside from color changes as prespawning behavior (Ref. 69400). 'The generalized condition of a midventral row of specialized scales suggests that the male mounts the female and aligns his body with hers during fertilization and deposition of the eggs' (Ref. 69400).

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Page, L.M. and B.M. Burr, 1991. A field guide to freshwater fishes of North America north of Mexico. Houghton Mifflin Company, Boston. 432 p. (Ref. 5723)

Status op de Rode Lijst van het IUCN (Ref. 130435)

  Niet bedreigd (LC) ; Date assessed: 01 March 2012

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

  Harmless





Gebruik door de mens

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Estimates based on models

Fylogenetische diversiteitsindex (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00537 (0.00235 - 0.01227), b=3.14 (2.94 - 3.34), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trofisch niveau (Ref. 69278):  3.2   ±0.40 se; based on food items.
Weerstandsvermogen (Ref. 120179):  Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (tmax=4; tm=1; Fec=80-196).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100).