Phractolaemus ansorgii, Hingemouth : fisheries

Phractolaemus ansorgii Boulenger, 1901

Hingemouth
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Phractolaemus ansorgii
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分類 / Names 俗名 | 同種異名 | Catalog of Fishes(, ) | ITIS | CoL | WoRMS | Cloffa

Actinopteri > Gonorynchiformes (Milkfishes) 鼠□目 (Milkfishes) > Kneriidae (Shellears) 克奈魚科 (Shellears) > Phractolaeminae
Etymology: Phractolaemus: Greek, phraktos = fence + Greek, laimos = throttle (Ref. 45335);  ansorgii: Named for the presence of 1-3 spines on the scales of the lateral line on the caudal peduncle, and on the 2 scale rows above and below the lateral line series (Ref. 93266).  More on author: Boulenger.

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

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

分布 國家 | FAO區域 | 生態系 | 發現紀錄 | Point map | 簡介 | Faunafri

Africa: in West Africa from Lake Nokoué (Ouémé River, Benin) (Ref. 81277) to Cross River (Cameroon) (Ref. 52397) including the 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 / 年齡

Maturity: Lm ?  range ? - ? cm
Max length : 25.0 cm TL 雄魚/尚未辨別雌雄; (Ref. 93183)

簡短描述 型態特徵 | 形態測量圖

背棘 (總數): 0; 背的軟條 (總數): 6; 臀棘 0; 臀鰭軟條: 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).
多骨的頭部。 鼻骨開口: 1) 細管,2) 半-在細管後面的圓圈。 狹窄的鰓裂。 背鰭與臀鰭有 2 單一的與 4個分支條。 骨骼的公式: 3.5/35-38/4.5:3.5:16 在 210 公分TL 的性同種二形: 眼與小刺的周圍雄性有 4個大的瘤結在尾梗上。 偶鰭帶有了紅色。

生物學特性     字彙 (例如 epibenthic)

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).

泳鰾具有肺的功能, 讓這一個種在缺氧的水域中存活。 嘴能被突出作為一個小的軀幹。

Life cycle and mating behavior 成熟度 | 繁殖 | 產卵場 | | 孕卵數 | 仔魚

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。

主要參考資料 Upload your references | 參考文獻 | 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)

IUCN 瀕危狀態 (Ref. 123251)

  無危 (LC) ; Date assessed: 05 June 2019

CITES (Ref. 123416)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

對人類具威脅

  無害處的





人類使用

漁業:
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Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 1.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00427 (0.00164 - 0.01111), b=3.13 (2.90 - 3.36), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
營養階層 (Ref. 69278):  2.3   ±0.1 se; based on diet studies.
回復力 (Ref. 120179):  .
瀕危性 (Ref. 59153):  Low vulnerability (13 of 100) .
價格種類 (Ref. 80766):   Unknown.