分類 / Names
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Teleostei >
Characiformes (Characins)
脂鯉目 (Characins) >
Alestidae (African tetras)
Alestidae (African tetras)
Etymology: Brycinus: Greek, ebrykon, brykomai = to bite, to gnaw (Ref. 45335).
More on author: Valenciennes.
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水; 半鹹淡水 大洋性; 河川洄游 (Ref. 51243). 熱帶; 22°C - 28°C (Ref. 12468)
Africa: present throughout intertropical Africa (Ref. 2880, 80290, 81279). Absence from the Gambia basin is noteworthy (Ref. 81279). Present in the Nile system (Ref. 28714, 58460) up to Lake Albert (Ref. 4903) and in Lake Turkana system (Ref. 28663). Widely distributed in the Congo River basin (Ref. 5331, 42019, 42510, 45434).
非洲: 之中-熱帶但是不存在於甘比亞流域。 來自到喀麥隆獅子山的塞內加爾，尼日，查德，佛塔河與流域; 蘇丹邊緣, 尼羅河，艾伯特湖尼羅河與 Murchison 尼羅河，湖艾伯特湖，維多利亞， Omo 與特坎那湖，剛果河流域上游.(參考文獻 5331)
Length at first maturity / 大小 / 重量 / 年齡
Maturity: Lm 18.5, range 33 - ? cm
Max length : 53.0 cm SL 雄魚/尚未辨別雌雄; (Ref. 2880); 最大體重: 2.0 kg (Ref. 3799)
臀棘: 0; 臀鰭軟條: 13 - 19. Diagnosis: fronto-parietal fontanel absent in adults, sometimes pore-like in juveniles; snout long, comprimised 3x in head length; dorsal fin origin distinctly behind pelvic fin insertion; adults large-sized; no sexual dimorphism affecting anal fin shape; 21-31 lateral line scales; 4.5 scales between lateral line and dorsal fin; 10-16 anal fin branched rays; 14-22 gill rakers on lower limb of first gill arch; 8-14 teeth in outer premaxillary row (Ref. 2880, 80290, 81279). Head length/snout length 2.6-2.9; 10-12 predorsal scales (Ref. 80290). Body depth more than 3x SL in adults (Ref. 2880, 81279).
甚至當幼魚時的沒有囟門。 上眼眶的硬骨發展良好的。 上頜當成魚時長度超過低的。 肱骨而前尾部的斑點黑色。 呈綠色的背面, 白色的腹面。 當成魚時只有有時有來自鰓蓋到尾鰭的橘色的側面斑紋。 大多數的魚有紅色-橘色的到粉紅色的鰭。 只有來自卡瓦利河的那些有鮮紅色鰭。 在尾柄的上半部上稚魚有白色的斑點。 在第一 ceratobranch 上的鰓耙。
More common in rivers than lakes; feeds on insects, crustaceans, fish, vegetation and debris (Ref. 28714). Considering the distribution of different forms (according to collection determinations), it should be noted that a B. macrolepidotus 'form' is found only in northern regions, while a B. schoutedi 'form' is found only in southern regions. However, between these two forms there appears to be mixing and intermediacy of forms. We consider that there are several populations which have evolved in a geographical gradient to produce different morphotypes of a single species (Ref. 80290).
較常見於河勝於湖。 吃昆蟲，甲殼動物，魚，植物與殘礫。 (參考文獻 28714)
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
非洲: 之中-熱帶但是不存在於甘比亞流域。 來自到喀麥隆獅子山的塞內加爾，尼日，查德，佛塔河與流域; 蘇丹邊緣, 尼羅河，艾伯特湖尼羅河與 Murchison 尼羅河，湖艾伯特湖，維多利亞， Omo 與特坎那湖，剛果河流域上游.(參考文獻 5331)
Paugy, D. and S.A. Schaefer, 2007. Alestidae. p. 347-411. In M.L.J. Stiassny, G.G. Teugels and C.D. Hopkins (eds.) Poissons d'eaux douces et saumâtres de basse Guinée, ouest de l'Afrique centrale/The fresh and brackish water fishes of Lower Guinea, west-central Africa. Vol. 1. Coll. Faune et Flore tropicales 42. Istitut de recherche pour le développement, Paris, France, Muséum nationale d'histoire naturelle, Paris, France and Musée royale de l'Afrique centrale, Tervuren, Belgique. 800 p. (Ref. 80290)
IUCN 瀕危狀態 (Ref. 130435: Version 2024-1)
無危 (LC) ; Date assessed: 16 April 2019
人類使用
漁業: 商業性
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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=0.00977 (0.00743 - 0.01285), b=2.99 (2.94 - 3.04), in cm total length, based on LWR estimates for this species (Ref.
93245).
營養階層 (Ref.
69278): 2.8 ±0.35 se; based on food items.
Generation time: 2.4 ( na - na) years. Estimated as median ln(3)/K based on 1
growth studies.
回復力 (Ref.
120179): 高度, 族群倍增時間少於 15個月 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (31 of 100).
