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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..
Environment: milieu / climate zone / depth range / distribution range
生態学
; 新鮮な水 底生の漂泳性. Subtropical
North America: restricted to the upper Tennessee River drainage of Tennessee, Virginia and North Carolina, USA.
サイズ / 重さ / 年齢
Maturity: Lm ? range ? - ? cm
Max length : 9.1 cm SL (female)
簡単な記述
検索表 | 形態学 | 形態計測学
背面の脊椎 (合計) : 11 - 16; 背鰭 (合計) : 12 - 13; 肛門の骨: 2; 脊つい: 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).
Inhabits flowing pools over rocky, sandy or silty substrates in clear creeks or small rivers (Ref. 75766). Occurs 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).
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 幼生
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)
IUCNのレッドリストの状況は (Ref. 130435)
攻撃されやすい (VU) (B1ab(ii,iii,iv,v)+2ab(ii,iii,iv,v)); Date assessed: 20 April 2012
Human uses
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インターネットの情報源
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 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).
栄養段階 (Ref.
69278): 3.4 ±0.4 se; based on size and trophs of closest relatives
回復力 (Ref.
120179): 高い, １５か月以下の倍増期間の最小個体群 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
