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Alcolapia grahami (Boulenger, 1912)

Magadi tilapia
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Alcolapia grahami
Male picture by Seegers, L.

分類 / Names 俗名 | 同種異名 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii 輻鰭魚綱 (條鰭魚) > Perciformes (Perch-likes) 鱸形目 (Perch-likes) > Cichlidae (Cichlids) 慈鯛科魚類 (Cichlids) > Pseudocrenilabrinae
Etymology: Alcolapia: From Albert Alcock, 1891, edited the research campaigne carried out by the ship Investigator in Bengal and Calcute + Bechauana, Tihape = fish.  More on author: Boulenger.

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

; 淡水 底中水層性; pH range: 7.5 - 8.5; dH range: 10 - 20.   熱帶; 24°C - 32°C (Ref. 2060); 1°S - 2°S

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

Africa: Lake Magadi in Kenya (Ref. 52331). Introduced in Lake Nakuru and Lake Elmenteita, both in Kenya (Ref. 52331). Reported as introduced to Lake Natron in Tanzania (Ref. 13364), but there is currently no evidence that any introduction led to establishment of breeding populations (Ref. 118638).
非洲: 在肯亞 (參考文獻 3881) 與湖天然碳酸鈉在坦尚尼亞的湖 Magadi 與 Nakuru(引入).(參考文獻 13364)

Length at first maturity / 大小 / 重量 / 年齡

Maturity: Lm ?, range 3 - ? cm
Max length : 20.0 cm SL 雄魚/尚未辨別雌雄; (Ref. 2)

簡短描述 型態特徵 | 形態測量圖

背棘 (總數): 11 - 13; 背的軟條 (總數): 12-13; 臀棘 3; 臀鰭軟條: 9 - 11; 脊椎骨: 28. Mature females with an overall golden hue; males with the flanks a pale blue. Swollen and brilliant white lateral parts of the lower lip of the mature male. Blue spots on scales becoming iridescent. Genital papilla conical, prominent and yellow in the mature male; swollen in the mature female. An oblique eye-bar intensely black in the breeding male, duller in the female.
成熟的雌性有一個整體的金色; 雄性有側面藍灰色。 成熟雄魚的下面唇的腫大而色彩豔麗白色側面部份。 在變成彩虹色的鱗片上的藍色的斑點。 生殖乳突錐形﹐突出的與黃色的在成熟的雄魚中; 腫大的在成熟的母魚中。 一個斜的眼-橫帶密集黑色在繁殖期的雄魚中, 比較遲鈍的在母魚中。

生物學特性     字彙 (例如 epibenthic)

Occur at temperatures ranging from 16.0-40.0 °C (Ref. 2). Feed actively in the evening. Young O. alcalicus grahami eat eggs as they are shed by the female, and much of the time and energy of the territorial male is occupied in driving them off. Feed on invertebrates, at the surface (Ref. 2).

生存在溫度範圍從 16.0-40.0 °C 。 (參考文獻 2) 晚上為食活躍地。 當他們被母魚流出的時候,幼魚 O. alcalicus grahami 吃卵,而且許多時間與具有領域性雄魚的能源在使他們外海方面被佔領。 捕食無脊椎動物, 在水表面。 (參考文獻 2)

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

Male prepares a breeding pit, the structure of which may vary with the nature of the substratum. Breeding activities are more actively pursued by both sexes in the morning than in the afternoon. Female lays about 3-10 eggs at a time, picks them up instantly and the male swims with his genital papilla near the mouth, probably emitting sperm. Brooding period reportedly 12-16 days. 非洲: 在肯亞 (參考文獻 3881) 與湖天然碳酸鈉在坦尚尼亞的湖 Magadi 與 Nakuru(引入).(參考文獻 13364)

主要參考資料 Upload your references | 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. Freshwaters 10(2):97-146. (Ref. 32272)

IUCN 瀕危狀態 (Ref. 120744)

  次級保育類動物, 見 IUCN 紅皮書 (VU) (D2); Date assessed: 31 January 2006

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

對人類具威脅

  無害處的





人類使用

漁業: ; 水族館: 商業性
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俗名
同種異名
新陳代謝
捕食者
生態毒物學
繁殖
成熟度
產卵場
產卵群集
孕卵數

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年龄/大小
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長度-重量
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豐度
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Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5625   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01738 (0.00747 - 0.04041), b=3.03 (2.83 - 3.23), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
營養階層 (Ref. 69278):  2.8   ±0.28 se; Based on food items.
回復力 (Ref. 69278):  高度, 族群倍增時間少於 15個月 (Preliminary K or Fecundity.).
瀕危性 (Ref. 59153):  Low to moderate vulnerability (27 of 100) .
價格種類 (Ref. 80766):   Unknown.