Oreochromis alcalicus (Hilgendorf, 1905)
Common Natron tilapia
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Oreochromis alcalicus
Male 拍攝者 Seegers, L.
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Male 拍攝者 Seegers, L.
分類 / 名稱 俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei > Cichliformes (Cichlids, convict blennies) 鱸形目 (Cichlids, convict blennies) > Cichlidae (Cichlids) 慈鯛科魚類 (Cichlids) > Pseudocrenilabrinae
Etymology: Oreochromis: Latin, aurum = gold + Greek, chromis = a fish, perhaps a perch (Ref. 45335).
More on author: Hilgendorf.
Etymology: Oreochromis: Latin, aurum = gold + Greek, chromis = a fish, perhaps a perch (Ref. 45335).
More on author: Hilgendorf.
環境： 環境 / 氣候帶 / 深度上下限 / 配送範圍 生態學
; 淡水 底中水層性. 熱帶; 2°S - 3°S
分布 領土 | FAO區域 | 生態系 | 發現紀錄 | 分布圖 | 簡介 | Faunafri
Africa: known only from the catchment of Lake Natron, Tanzania and Kenya (Ref. 2, 5166, 118638).
非洲: 坦尚尼亞與肯亞 (湖天然碳酸鈉; 在湖 Nakuru 中引入).
非洲: 坦尚尼亞與肯亞 (湖天然碳酸鈉; 在湖 Nakuru 中引入).
大小 / 重量 / 年齡
簡短描述 檢索表 | 型態特徵 | 形態測量圖
背棘 (總數) : 9 - 13; 背的軟條 (總數) : 11 - 15; 臀棘: 3; 臀鰭軟條: 9 - 11; 脊椎骨: 27 - 30. Diagnosis: A small elongated species with a terminal mouth (Ref. 118638). Mature males have dark-edged dorsal and anal fins, iridescent blue-white spots on flanks, white lower lips, and a spotted caudal fin with a pink edge; they appear to be colour polymorphic, with some males having yellow bellies and throats, while others are blue white: both morphs can be found in the same location and the colours are stable in aquarium-held specimens, suggesting it is a true polymorphism and not related to reproductive state (Ref. 118638). Females and non-territorial males are sandy-coloured, pale ventrally, sometimes with faint vertical bars (Ref. 118638).
Body shape (shape guide): short and / or deep; Cross section: compressed.
成熟的雌性有一個整體的金色; 雄性有側面一藍灰色與下面唇的側面部份腫大而色彩豔麗的。 在鱗片上的完整的顏色藍色的斑點中變成彩虹色。 生殖乳突在成熟的雄魚中是錐形﹐突出的與黃色的, 比較不突出, 但是腫大的在成熟的母魚中。 在頰 3-4 上的鱗片列. 眶前骨只有 4個孔與沒有鱗片。 (參考文獻 4967)
Body shape (shape guide): short and / or deep; Cross section: compressed.
成熟的雌性有一個整體的金色; 雄性有側面一藍灰色與下面唇的側面部份腫大而色彩豔麗的。 在鱗片上的完整的顏色藍色的斑點中變成彩虹色。 生殖乳突在成熟的雄魚中是錐形﹐突出的與黃色的, 比較不突出, 但是腫大的在成熟的母魚中。 在頰 3-4 上的鱗片列. 眶前骨只有 4個孔與沒有鱗片。 (參考文獻 4967)
Occurs at a temperature range of 30-32°C (Ref. 2). It feeds actively in the early morning; mainly on algae as well as copepods and dipterous larvae (Ref. 2). A maternal mouthbrooder: males excavate pits in the substrate in shallow water (Ref. 2, 118638). The species is occasionally caught as a food fish in its natural range; although it attains a small size, its tolerance of hostile environments may make it suitable for culture in high salinity environments; potential as an aquarium fish (Ref. 118638). Classed as endangered, due to its restricted distribution (Ref. 118638).
生存在一個 30-32 °C 的溫差。 (參考文獻 2) 活躍地在清晨中為食; 主要吃藻類以及橈腳類的動物與雙翅目昆蟲幼生.(參考文獻 2)
生存在一個 30-32 °C 的溫差。 (參考文獻 2) 活躍地在清晨中為食; 主要吃藻類以及橈腳類的動物與雙翅目昆蟲幼生.(參考文獻 2)
生命週期和交配行為 成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
Early in the morning before taking possession of their pits, the males feed on slimy algal growths-noisily; sexual activity is greater after noon than before; young male may build a small pit around that of a larger male and mate there with a small female (Ref. 2). Males prepare and guard nests, while females migrate from one nest to another; males guard the nest against juveniles of their own species and other species which feed on the fertilized eggs which fall from the mouth of the female mouth brooder (Ref. 11288). Also Ref. 118638.非洲: 坦尚尼亞與肯亞 (湖天然碳酸鈉; 在湖 Nakuru 中引入).
主要參考資料
上傳您的推薦信 | 參考文獻 | 合作者 : Kullander, Sven O. | 合作者
Seegers, L. and H. Tichy, 1999. The Oreochromis alcalicus flock (Teleostei: Cichlidae) from lakes Natron and Magadi, Tanzania and Kenya, with descriptions of two new species. Ichthyol. Explor. Freshwat. 10(2):97-146. (Ref. 32272)
IUCN 瀕危狀態 (Ref. 130435: Version 2025-2 (Global))
瀕危 (EN) (B1ab(i,ii,iii)+2ab(i,ii,iii)); Date assessed: 31 January 2006
CITES
Not Evaluated
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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=0.01905 (0.00846 - 0.04293), b=3.01 (2.82 - 3.20), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
營養階層 (參考文獻 69278): 2.7 ±0.21 se; based on food items.
回復力 (參考文獻 120179): 高度, 族群倍增時間少於 15個月 (Preliminary K or Fecundity.).