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Oreochromis niloticus (Linnaeus, 1758)

Nile tilapia
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Tunisia country information

Common names: [No common name]
Occurrence: introduced
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments:
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/ts.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Welcomme, R.L., 1988
National Database:

Common names from other countries

Tilapia du Nil, Tilapia del Nilo, Тилапия нильская, ... more

分類 / Names 俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa

Teleostei > Cichliformes (Cichlids, convict blennies) > Cichlidae (Cichlids) > Pseudocrenilabrinae
Etymology: Oreochromis: Latin, aurum = gold + Greek, chromis = a fish, perhaps a perch (Ref. 45335);  niloticus: Cancellata = barred, referring to the dark bars on the flanks of the species (Ref. 58535).
  More on author: Linnaeus.

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

; 淡水; 半鹹淡水 底中水層性; 河川洄游 (Ref. 51243); 深度上下限 0 - 20 m (Ref. 32849), usually ? - 20 m (Ref. 34290).    14°C - 33°C (Ref. 3); 32°N - 5°S, 17°W - 38°E

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

Africa: naturally occurring in coastal rivers of Israel (Ref. 5166), Nile basin (including lake Albert, Edward and Tana), Jebel Marra, Lake Kivu, Lake Tanganyika, Awash River, various Ethiopian lakes, Omo River system, Lake Turkana, Suguta River and Lake Baringo (Ref. 2). In West Africa natural distribution covers the basins of the Senegal, Gambia, Volta, Niger, Benue and Chad, with introduced specimens reported from various coastal basins (Ref. 53405). Widely introduced for aquaculture, with many existing strains. Several countries report adverse ecological impact after introduction. The following subspecies were previously recognized: Oreochromis niloticus baringoensis, Oreochromis niloticus cancellatus, Oreochromis niloticus eduardianus, Oreochromis niloticus filoa, Oreochromis niloticus niloticus, Oreochromis niloticus sugutae, Oreochromis niloticus tana and Oreochromis niloticus vulcani.

Length at first maturity / 大小 / 重量 / 年齡

Maturity: Lm 18.6, range 6 - 28 cm
Max length : 60.0 cm SL 雄魚/尚未辨別雌雄; (Ref. 4967); 最大體重: 4.3 kg (Ref. 40637); 最大年齡: 9 年 (Ref. 164)

簡短描述 檢索表 | 型態特徵 | 形態測量圖

背棘 (總數) : 15 - 18; 背的軟條 (總數) : 11 - 13; 臀棘: 3; 臀鰭軟條: 9 - 11; 脊椎骨: 30 - 32. Diagnosis: A large deep-bodied tilapia, with a relatively small head (Ref. 118638). Jaws of mature male not greatly enlarged, length of lower jaw 29-37% of head length; genital papilla of breeding male not tassellated (Ref. 2). Body depth 36-50% of SL (Ref. 28714). Most distinguishing characteristic is the presence, at all life stages, of regular vertical stripes throughout depth of caudal fin (Ref. 4967, 53405, 118638). In smaller fishes, these are relatively wide and form an arc, and start at the base of the caudal fin (Ref. 118638). Males are bluish pink, sometimes with a dark throat, belly, anal and pelvic fins; females are usually brownish, silvery/white beneath with around 10 thin vertical bars (Ref. 118638).

生物學特性     字彙 (例如 epibenthic)

Occurs in a wide variety of freshwater habitats like rivers, lakes, sewage canals and irrigation channels (Ref. 28714). Does not do well in pure salt water, but is able to survive in brackish water (Ref. 52307). Mainly diurnal. Feeds mainly on phytoplankton or benthic algae. Additionally, insect larvae are of some importance, as are aufwuchs and detritus; juveniles tend to be more omnivorous than adults (Ref. 52307). Oviparous (Ref. 205), ovophilic (Ref. 52307). A maternal mouthbrooder (Ref. 2, 28714, 52307, 118638), males dig simple pits in shallow water (Ref. 118638). May mature early (about 11 cm TL females, 14 cm TL males) (Ref. 28714). Globally, the most important tilapia species in fish farming and supports major capture fisheries where established; generally highly invasive and known to hybridise with many other Oreochromis species and for this reason further stocking has been banned in a number of countries, e.g. South Africa, Malawi and Zambia (Ref. 118638). Extended temperature range 8-42 °C, natural temperature range 13.5 - 33 °C (Ref. 3). Maximum depth from Ref. 34290. Marketed fresh and frozen (Ref. 9987).

Life cycle and mating behavior Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔魚

Sexual maturity is reached at 3-6 months depending on temperature, reaching about 30 g. Reproduction occurs only when temperatures are over 20°C. Several yearly spawnings every 30 days. Females incubate eggs inside their mouths (approximately for a week) where larvae hatch and remain until the vitellus is reabsorved. Egg size 1.5 mm, larval length at hatching 4 mm. Spawns in firm sand in water from 0.6 to 2 m deep of lakes (Ref. 2) and inshore waters (Ref. 55624). Males set up and defend territory which are visited by the females. Courtship lasts several hours. A single male probably fertilises the eggs of more than one female (Ref. 55624). Eggs are shed in batches in shallow nest and fertilized by male. Each batch of eggs is picked up into oral cavity by female. Females solely involved in broodcare. Female carries up to 200 eggs in her mouth where the larvae hatch and remain until after the yolk-sac is absorbed.

主要參考資料 Upload your references | 參考文獻 | 合作者 : Kullander, Sven O. | 合作者

Trewavas, E., 1983. Tilapiine fishes of the genera Sarotherodon, Oreochromis and Danakilia. British Mus. Nat. Hist., London, UK. 583 p. (Ref. 2)

IUCN 瀕危狀態 (Ref. 130435)

  無危 (LC) ; Date assessed: 06 April 2020

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

對人類具威脅

 




人類使用

漁業: 高經濟性; 養殖: 商業性
FAO(Aquaculture systems: 產生, 魚種描繪; 漁業: 產生, 魚種描繪; publication : search) | FishSource |

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網路資源

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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01905 (0.01589 - 0.02285), b=2.97 (2.93 - 3.01), in cm Total Length, based on LWR estimates for this species (Ref. 93245).
營養階層 (Ref. 69278):  2.0   ±0.0 se; based on diet studies.
回復力 (Ref. 120179):  中等的, 族群倍增時間最少 1.4 - 4.4年 (K=0.14-0.41; tm=1-2; tmax=9; Fec < 1,000).
Fishing Vulnerability (Ref. 59153):  Low to moderate vulnerability (30 of 100).
價格種類 (Ref. 80766):   Unknown.