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Bryconaethiops yseuxi Boulenger, 1899

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drawing shows typical species in Alestidae.

Congo (Brazzaville) country information

Common names: [No common name]
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: live export: yes;
Comments: Known from the Djoué River, a right bank affluent of the lower Congo at the exit of Pool Malebo (Ref. 74421).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/cf.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Ibala Zamba, A., G. De Boeck, V. Mamonekene and E. Vreven, 2007
National Database:

Common names from other countries

Kongo vimpelsalmler, ... more

分類 / Names 共通名の | 類義語 | Catalog of Fishes(部類, 種) | ITIS | CoL | WoRMS | Cloffa

> Characiformes (Characins) > Alestidae (African tetras)
Etymology: Bryconaethiops: Greek, bryko = to bite+ Aethiops, region in North east Africa (Ref. 45335);  yseuxi: Named after Dr. E. Yseux, professor at the Université Libre de Bruxelles (Ref. 74421).
  More on author: Boulenger.

Environment: milieu / climate zone / depth range / distribution range 生態学

; 新鮮な水 外洋の.   Tropical

分布 国々 | 国連食糧農業機関の区域 | エコシステム | 事件 | Point map | 導入 | Faunafri

Africa: from Boma on the lower Congo River up to Pool Malebo, in Republic of Congo and Democratic Republic of the Congo basin (Ref. 74421).

サイズ / 重さ / 年齢

Maturity: Lm ?  range ? - ? cm
Max length : 7.2 cm SL オス/雌雄の選別がない; (Ref. 74421)

簡単な記述 検索表 | 形態学 | 形態計測学

背面の脊椎 (合計) : 0; 背鰭 (合計) : 10; 肛門の骨: 0; 臀鰭: 21 - 23. Bryconaethiops yseuxi can be distinguished from all other known Bryconaethiops species based on the following unique combination of characters: a high number of scale rows between anterior origin of dorsal fin and lateral line (7.5 vs. 6.5 or less); a low number of gill rakers on the first gill arch; and a long dorsal-fin and anal-fin bases, respectively 15.7-17.6% and 22.7-25.9% of standard length (Ref. 74421). Body deep and somewhat laterally compressed (Ref. 74421). Mouth terminal; upper jaw with three rows of premaxillary teeth; external row composed of two small median teeth with a small lateral cusp at their outer side; a median row with 6 or 7 teeth; and an inner row of 8 pluricuspid teeth with their cusp on a median row and without an anterior cusp or row of cusps as generally found in the other Bryconaethiops species (Ref. 74421). Lower jaw with an external series of 6 large pluricuspid teeth and an inner row of two median caniniform teeth (Ref. 74421). Lateral line scales 34-39; longitudinal line scales 36-40 (Ref. 74421). Head and body of live mature male specimens silvery with a pinkish hue on sides of the body; upper side of head green-olive; humeral spot present but not well marked; adipose-fin whitish transparent, blackish at base (Ref. 74421). After preservation, body yellowish white; darker above lateral line with scales above lateral line faintly dark brown on their basal part; fins whitish, transparent in overall appearance; humeral spot not well distinguishable, or even regularly absent (Ref. 74421).

生物学     用語集 (例 epibenthic)

Life cycle and mating behavior Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 幼生

主な参考文献 Upload your references | 参考文献 | コーディネーター | 協力者

Ibala Zamba, A., G. De Boeck, V. Mamonekene and E. Vreven, 2007. Rehabilitation of Bryconaethiops yseuxi Boulenger, 1899 (Characiformes: Alestidae) from the Congo River basin, Africa. J. Nat. Hist. 41(17-20):1213-1226. (Ref. 74421)

IUCNのレッドリストの状況は (Ref. 130435)

  評価されなかった 

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

人間に対する脅威

  Harmless




Human uses

FAO(Publication : search) | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5312   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01148 (0.00528 - 0.02495), b=3.00 (2.82 - 3.18), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
栄養段階 (Ref. 69278):  3.1   ±0.3 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).