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Ichthyborus besse (Joannis, 1835)

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drawing shows typical species in Distichodontidae.


Sudan (North) country information

Common names: Alekagurgur, Atem duor, Cwak
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Known from the White Nile (Ref. 28714, 120561).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/su.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Moritz, T., Z.N. El Dayem, M.A. Abdallah and D. Neumann, 2019
National Database:

Common names from other countries

分类 / Names 俗名 | 同种异名 | Catalog of Fishes(, ) | ITIS | CoL | WoRMS | Cloffa

Teleostei > Characiformes (Characins) > Distichodontidae (Distichodus)
Etymology: Ichthyborus: Greek, ichthyboros, -os, -on = that eats fishes (Ref. 45335).

Environment: milieu / climate zone / depth range / distribution range 生态学

; 淡水 大洋性.   熱帶

分布 国家 | FAO区域 | 生态系 | 标本纪录 | Point map | 简介 | Faunafri

Africa: White Nile basin (Ref. 2936, 28714), Chad basin and Benue River (Ref. 2936, 86396).
非洲: 尼羅河,查德流域與 Benoue。

Length at first maturity / 大小 / 重量 / 年龄

Maturity: Lm 14.0  range ? - ? cm
Max length : 25.0 cm TL 雄鱼/尚未辨别雌雄; (Ref. 28714)

简单描述 检索表 | 型态特徵 | 形态测量图

Diagnosis: body depth 4.7-6.2 and head length 3.1-3.8x SL; caudal peduncle 1.5-2x longer than high; head flattened, 2.9-3.5 longer than wide; eye diameter 4-7x of head length; scale formula 12.5-14.5/90-107/13.5-14.5; single, dark, undulating longitudinal band along lateral line (not visible in live specimens); caudal-fin lobes marked with oblong black spots (Chad and Benué) (Ref. 2936, 86396).
体高 4.7-6.2, 头长 3.1-3.8 x SL。 尾柄 1.5-2 倍于高的。 头部 2.9-3.5 长度超过宽的。 尖的吻, 短于眼睛后面的部份。 眼直径 4-7 倍于头长。 银色或浅灰色的身体有侧边上在侧线下面的深色侧面的条纹波动。 背鳍灰色或淡黄色的, 尾鳍鲜黄色的有黑色的长方形斑点。

生物学特性     字汇 (例如 epibenthic)

Maximum TL was recorded at 24.5 cm (Ref. 7094). Inhabits open water and fringing vegetation. Feeds on Caridina and fish fry (Ref. 28714).

最大体长TL记录为 24.5 公分。 (参考文献 7094) 栖息于开放水域与岸边的植丛。 吃 Caridina 与鱼苗。 (参考文献 28714)

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

非洲: 尼羅河,查德流域與 Benoue。

主要参考文献 Upload your references | 参考文献 | 合作者 | 合作者

Gosse, J.-P. and E.J. Coenen, 1990. Distichodontidae. p. 237-260. In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douces et saumâtres de l'Afrique de l'Ouest. Tome I. Coll. Faune Tropicale n° XXVIII. Musée Royal de l'Afrique Centrale, Tervuren and O.R.S.T.O.M., Paris, 384 p. (Ref. 2936)

世界自然保护联盟红皮书 (Ref. 130435)

  最不相关 (LC) ; Date assessed: 28 August 2019

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

对人类的威胁

  无害处的




人类利用

FAO(Publication : search) | FishSource |

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Trophic ecology
食物相
Diet compositions
Food consumptions
Food rations
捕食者
Ecology
生态学
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Population dynamics
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Max. ages / sizes
Length-weight rel.
Length-length rel.
体长-频率
Mass conversions
Recruitments
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繁殖
Maturities
Fecundities
Spawnings
Spawning aggregations
Egg(s)
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仔鱼
稚鱼动力学
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Anatomy
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Otoliths
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Nutrients
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Visual pigment(s)
鱼的声音
Diseases / Parasites
Toxicities (LC50s)
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遗传学
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Human related
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水产养殖描述
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Ciguatera cases
Stamps, coins, misc.
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形态测量图
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参考文献

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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=0.00380 (0.00147 - 0.00981), b=3.11 (2.88 - 3.34), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
营养阶层 (Ref. 69278):  4.0   ±0.3 se; based on diet studies.
回复力 (Ref. 120179):  高度, 族群倍增时间少于 15个月 (K=0.6).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (23 of 100).