Chrysichthys auratus (Geoffroy Saint-Hilaire, 1809)
Golden Nile catfish
分類 / 名稱 俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei > Siluriformes (Catfishes) > Claroteidae (Claroteid catfishes)
Etymology: Chrysichthys: Greek, chrysos = golden + Greek, ichthys = fish (Ref. 45335).
Etymology: Chrysichthys: Greek, chrysos = golden + Greek, ichthys = fish (Ref. 45335).
環境： 環境 / 氣候帶 / 深度上下限 / 配送範圍 生態學
; 淡水; 半鹹淡水 居於水底的; 河川洄游 (Ref. 51243). 熱帶; 26°C - 31°C (Ref. 27935); 36°N - 2°N, 16°W - 34°E (Ref. 7324)
分布 領土 | FAO區域 | 生態系 | 發現紀錄 | 分布圖 | 簡介 | Faunafri
Africa: known from most of the West African hydrographic basins, except in the coastal areas between Gambia and Liberia, where it is replaced by Chrysichthys maurus (Ref. 7324, 57126). Present from southern Liberia to Cabinda (Angola) (Ref. 57126), and widespread throughout Lower Guinea (Ref. 81642). Also reported from the Chad (Ref. 3236, 57126) and Nile (Ref. 3236, 2988, 28663, 78586) basins.
非洲: 尼羅河與特坎那湖 (?)。 在非洲的西岸上也記錄自象牙海岸與迦納 (參考文獻 272) ，奈及利亞 (參考文獻 3799) 與喀麥隆 (參考文獻 271) 。
非洲: 尼羅河與特坎那湖 (?)。 在非洲的西岸上也記錄自象牙海岸與迦納 (參考文獻 272) ，奈及利亞 (參考文獻 3799) 與喀麥隆 (參考文獻 271) 。
初熟時的長度 / 大小 / 重量 / 年齡
成熟度: Lm 11.0, range 8 - 19 cm
Max length : 57.0 cm TL 雄魚/尚未辨別雌雄; (Ref. 41031); 35.0 cm SL (female); 最大體重: 0.00 g
Max length : 57.0 cm TL 雄魚/尚未辨別雌雄; (Ref. 41031); 35.0 cm SL (female); 最大體重: 0.00 g
簡短描述 檢索表 | 型態特徵 | 形態測量圖
背棘 (總數) : 2; 背的軟條 (總數) : 5 - 6; 臀棘: 0. Diagnosis: 1st branched dorsal-fin ray longest, nearly always extended into a long filament that may reach, or even exceed, the base of the caudal fin; in some individuals or populations (Mafou on the upper Niger; rivers Cross, Ogowe, Nyong; Sanaga estuary) this filament is strongly reduced, but the first branched ray remains the longest (Ref. 57126, 81642). In other populations this filament is particularly elongate (Sanaga mainstream and coastal rivers of Cabinda)(Ref. 81642). Usually 8 branched rays in pectoral fins (Ref. 57126, 81642), rarely 7 or 9 (Ref. 57126, 81642), 2nd and 3rd rays sometimes filamentous (Ref. 57126). Exhibits pronounced intraspecific variability, and a clinal series can be demonstrated in the size of the adipose fin and the number of gill rakers (Ref. 81642). Either 9-13 gill rakers on lower limb of first gill arch and base of adipose fin longer than dorsal-fin base (Nilo-Sudanese region = populations from Nile, Chad, Senegal and the upper courses of the Niger, Comoé, Benue and Volta), or 12-15 lower gill rakers and base of adipose fin shorter than, or equal to, dorsal-fin base (coastal zones from Liberia to Cabinda); populations from the middle and lower courses of coastal rivers in this region are more or less intermediate in regard to these characters (Ref. 57126, 81642). Pronounced dimorphism between mature males in reproductive activity and immature males (Ref. 57126, 81642).
Body shape (shape guide): elongated.
Body shape (shape guide): elongated.
In those parts where Chrysichthys maurus and Chrysichthys auratus overlap (from Liberia to Ghana, to the east of the Volta), C. auratus does not enter rivers, but remains in estuaries and lagoons, where both species are sympatric; in the coastal region, C. auratus has been reported as C. filamentosus (Ref. 57126). Found in lakes and coastal rivers (Ref. 3236) and appears to tolerate a certain amount of salt (Ref. 78218). Occurs usually over soft, slightly muddy substrates or substrates with heavy layers of leafy detritus in deep, relatively quiet waters (Ref. 6868). Feeds on mollusks and small crustaceans (Branchiopods, Copepods, Ostracoda) which it digs from the substrate (Ref. 27935), and also on insects (Ref. 28714) and fish (Ref. 28714, 78218).
出現於湖。 吃軟體動物與小型甲殼動物 (鰓足類，橈腳類的動物, 介形亞綱動物) 它挖從底部.(參考文獻 27935) 它也吃魚與昆蟲。 (參考文獻 28714)
出現於湖。 吃軟體動物與小型甲殼動物 (鰓足類，橈腳類的動物, 介形亞綱動物) 它挖從底部.(參考文獻 27935) 它也吃魚與昆蟲。 (參考文獻 28714)
生命週期和交配行為 成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
非洲: 尼羅河與特坎那湖 (?)。 在非洲的西岸上也記錄自象牙海岸與迦納 (參考文獻 272) ，奈及利亞 (參考文獻 3799) 與喀麥隆 (參考文獻 271) 。
主要參考資料
上傳您的推薦信 | 參考文獻 | 合作者 | 合作者
Risch, L.M., 2003. Claroteidae. p. 60-96 In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douce et saumâtres de l'Afrique de l'Ouest, Tome 2. Coll. Faune et Flore tropicales 40. Musée Royal de l'Afrique Centrale, Tervuren, Belgique, Museum National d'Histoire Naturalle, Paris, France and Institut de Recherche pour le Développement, Paris, France. 815 p. (Ref. 57126)
CITES
Not Evaluated
對人類具威脅
無害處的
人類使用
漁業: 商業性
FAO - Publication: search | FishSource |
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基於模型的估計
|
系統發育多樣性指數 (參考文獻 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
| Bayesian length-weight | a=0.01023 (0.00784 - 0.01335), b=2.96 (2.90 - 3.02), in cm total length, based on LWR estimates for this species (Ref. 93245). |
|
營養階層 (參考文獻 69278) |
3.7 ±0.55 se; based on food items. |
| Generation time | 6.9 ( na - na) years. Estimated as median ln(3)/K based on 2 growth studies. |
|
回復力 (參考文獻 120179) |
中等的, 族群倍增時間最少 1.4 - 4.4年 (K=0.16; Fec > 1,000). |
|
釣魚的脆弱性 (Ref. 59153) |
Low to moderate vulnerability (27 of 100). 🛈 |
|
價格種類 (Ref. 80766) |
Unknown. |