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Phractolaemus ansorgii Boulenger, 1901

Hingemouth
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Phractolaemus ansorgii
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分类 / Names 俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa

Teleostei > Gonorynchiformes (Milkfishes) > Phractolaemidae (Hingemouths)
Etymology: Phractolaemus: Greek, phraktos = fence + Greek, laimos = throttle (Ref. 45335).
Eponymy: Dr William John Ansorge (1850–1913) was an English explorer and collector who was active in Africa in the second half of the 19th century. [...] (Ref. 128868), visit book page.
More on author: Boulenger.

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

; 淡水 底中水层性; pH range: 6.0 - 8.0; dH range: ? - 25. 熱帶; 25°C - 30°C (Ref. 13371)

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

Africa: in West Africa from Lake Nokoué (Ouémé River, Benin) (Ref. 81277) to Cross River (Cameroon) (Ref. 52397), including Ogun, Osse and Niger Delta (Ref. 81277). Also in the middle Congo River basin (Ref. 93183) in Republic of Congo and Democratic Republic of the Congo.
非洲: 從尼日三角州到瑙固維湖與剛果河流域,限制了分布。

大小 / 重量 / 年龄

Maturity: Lm ?  range ? - ? cm
Max length : 25.0 cm TL 雄鱼/尚未辨别雌雄; (Ref. 93183)

简单描述 检索表 | 型态特徵 | 形态测量图

背棘 (总数) : 0; 背的软条 (总数) : 6; 臀棘: 0; 臀鳍软条: 6; 脊椎骨: 34 - 38. Diagnosis: head depressed and strongly ossified; anterior nostril elongate, forming an oblique, forward-pointing tube; posterior nostril crescent-shaped, located just behind the narial tube (Ref. 2913, 81277). Mouth small, protrusible (Ref. 245, 31256, 81277), placed at tip of a proboscis and opening upwards between the narial tubes (Ref. 2913, 81277), on upper surface of snout (Ref. 245, 31256). Narrow gill opening, but opercles very well developed, covering also the underside of the head where they overlap (Ref. 2913, 81277, 93183).
多骨的头部。 鼻骨开口: 1) 细管,2) 半-在细管后面的圆圈。 狭窄的鳃裂。 背鳍与臀鳍有 2 单一的与 4个分支条。 骨骼的公式: 3.5/35-38/4.5:3.5:16 在 210 公分TL 的性同种二形: 眼与小刺的周围雄性有 4个大的瘤结在尾梗上。 偶鳍带有了红色。

生物学特性     字汇 (例如 epibenthic)

Facultative or obligate air-breathing (Ref. 126274); Lives in forest pools and swamps (Ref. 41580). Microphagous (Ref. 4910, 41580, 45483), especially phytophagous (epiphytes), and detritiphagous (Ref. 41580). Swim bladder entirely alveolar, functioning like a lung; this adaptation to aerial breathing allows the fish to survive under poor oxygenation conditions (Ref. 2913, 81277); recorded from nearly deoxygenated lungfish nest in Pool Malebo, Congo DR (Ref. 41585). Gonads, which are largely fused, are situated ventrally, not dorsally, in abdominal cavity (Ref. 41580). Mouth can be projected as a small trunk (Ref. 2913). Eggs transparent, yellow-greenish, 1.5-1.7mm diameter; large females may have several thousands of eggs (Ref. 41580). Particular blood system, with dark coloured and an abundant amouth of blood (Ref. 4910).

泳鳔具有肺的功能, 让这一个种在缺氧的水域中存活。 嘴能被突出作为一个小的躯干。

Life cycle and mating behavior 成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼

Males and females have lateral tubercles on their body which probably aid in maintaining contact during spawning (Ref. 38266).非洲: 從尼日三角州到瑙固維湖與剛果河流域,限制了分布。

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

Lévêque, C., 1990. Phractolaemidae. p. 189-191. In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douces et saumâtres d'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. 2913)

世界自然保护联盟红皮书 (Ref. 130435: Version 2024-1)

  最不相关 (LC) ; Date assessed: 05 June 2019

CITES

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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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 1.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00437 (0.00172 - 0.01106), b=3.13 (2.90 - 3.36), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
营养阶层 (Ref. 69278):  2.3   ±0.1 se; based on diet studies.
Fishing Vulnerability (Ref. 59153):  Low vulnerability (15 of 100).