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Characiformes (Characins) >
Characidae (Characins; tetras) > Characinae
Etymology: Priocharax: Greek, prio = to saw + Greek, charax, -akos = a fish without identification (Ref. 45335); nanus: Derived from the Latin nanus (meaning a dwarf) in allusion to the tiny size of adult specimens of the species. A noun in apposition.
Environment: milieu / climate zone / depth range / distribution range
生態学
; 新鮮な水 底生の漂泳性; 深さの範囲 0 - 1 m (Ref. 96862). Tropical
South America: Rio Negro basin, Amazonas, Brazil.
サイズ / 重さ / 年齢
Maturity: Lm ? range ? - ? cm
Max length : 1.5 cm SL オス/雌雄の選別がない; (Ref. 96862)
簡単な記述
検索表 | 形態学 | 形態計測学
背鰭 (合計) : 10 - 11; 脊つい: 32 - 34. Priocharax nanus can be distinguished from its congeners (P. ariel and P. pygmaeus) by having i,6 pelvic-fin rays (vs. i,5), a claustrum (vs. claustrum absent) and two postcleithra (vs. postcleithra absent). It can be further diagnosed from P. ariel by having 9-10 gill rakers on the lower limb of the first branchial arch (vs. 11-13), caudal peduncle length 13.5-16.8 % SL (vs. 18.1- 23.7 % SL); and 21-26 branched anal-fin rays (vs. 16-21) (Ref. 96862).
Collected in the black acidic waters of the Rio Negro basin around the submerged vegetation at depths of about 1 m or less and from an area exposed to the sun in warm, shallow water, approximately 50 cm deep (Ref. 96862).
Life cycle and mating behavior
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Toledo-Piza, M., G.M.T. Mattox and R. Britz, 2014. Priocharax nanus, a new miniature characid from the rio Negro, Amazon basin (Ostariophysi: Characiformes), with an updated list of miniature Neotropical freshwater fishes. Neotrop. Ichthyol. 12(2):229-246. (Ref. 96862)
IUCNのレッドリストの状況は (Ref. 130435: Version 2024-2)
Human uses
水産業: 興味がない
用具
特記事項
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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 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00661 (0.00301 - 0.01449), b=3.11 (2.93 - 3.29), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
栄養段階 (Ref.
69278): 3.0 ±0.5 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).
