Oreochromis rukwaensis, Lake Rukwa tilapia : fisheries

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Oreochromis rukwaensis (Hilgendorf & Pappenheim, 1903)

Lake Rukwa tilapia
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Pictures | 谷歌图片
Image of Oreochromis rukwaensis (Lake Rukwa tilapia)
Oreochromis rukwaensis
Male picture by Turner, G.F.

分类 / Names 俗名 | 同种异名 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii 辐鳍鱼纲 (条鳍鱼) > Perciformes (Perch-likes) 鱸形目 (Perch-likes) > Cichlidae (Cichlids) 麗魚科 (Cichlids) > Pseudocrenilabrinae
Etymology: Oreochromis: Latin, aurum = gold + Greek, chromis = a fish, perhaps a perch (Ref. 45335).  More on authors: Hilgendorf & Pappenheim.

Environment: milieu / climate zone / depth range / distribution range 生态学

; 淡水 底中水层性.   熱帶; 7°S - 9°S

分布 国家 | FAO区域 | 生态系 | 标本纪录 | Point map | 简介 | Faunafri

Africa: Lake Rukwa (Ref. 2, 118630) and upper Great Ruaha River in Tanzania (Ref. 118630).
非洲: 在坦尚尼亞的魯誇湖。

大小 / 重量 / 年龄

Maturity: Lm ?  range ? - ? cm
Max length : 33.0 cm SL 雄鱼/尚未辨别雌雄; (Ref. 4967)

简单描述 型态特徵 | 形态测量图

背棘 (总数): 15 - 17; 背的软条 (总数): 11-13; 臀棘 3; 臀鳍软条: 10 - 11; 脊椎骨: 30. Diagnosis: Typical tilapiine cichlid, relatively deep bodied, with rather a small head (Ref. 118638). Other distinguishing characters are: caudal fin free of scales except basally; vertebrae 30; scales in lateral line series 30-32; dorsal spines XV-XVII; soft rays usually 11-13; outer teeth bicuspid, in mature fishes occasionally with a few tricuspids; lower gill-rakers 20-22; interorbital region in adults 34.5-40.0% length of head (Ref. 2). Ripe males have a dark body and fins, almost black, with bright red/orange margins on the dorsal and caudal fins; vertical barring can be noticeable in freshly caught specimens; head region in ripe males has a bluish sheen; ripe males have yellow-orange tassels; females and subadult males plain silver/grey with 6-7 post-opercular vertical stripes and bluish snout present in freshly caught specimens (Ref. 118638).
尾鳍没有鳞片除了基部地之外。 在 2 列中的在颊上的鳞片。 脊椎骨 30. 外部的齿二头齿,偶然地具有一些三尖瓣。 繁殖期的雄性主要地黑色的有橘色的边缘到背鳍与尾鳍鳍; 腹鳍黑色或淡黄色的与长的生殖流苏橘黄色的; 在鳃盖与吻上的彩虹色的大理石纹。

生物学特性     字汇 (例如 epibenthic)

This species is found both in large lakes and small rivers (Ref. 4967, 118638). A maternal mouthbrooder (Ref. 118638). Males construct territories in shallow water; where there was ample space they were similar in structure and grouping to those of Oreochromis variabilis, each territory consisting of a central raised mating platform in the middle of a large circular depression (Ref. 2). It is a major component of the fisheries catch in Lake Rukwa and the Mtera Dam (Ref. 118638). Strong aquaculture potential given broad habitat requirements (Ref. 118638). IUCN conservation status is stated as vulnerable D2, declining population trend (Ref. 118638).

栖息于湖与河。 (参考文献 4967) 雄性在浅水区中构造领土。 在哪里有充足的空间, 每领土在大而圆形凹洼的中央中有了中央凸起的交配平台.(参考文献 2)

Life cycle and mating behavior 成熟度 | 繁殖 | 产卵场 | | 孕卵数 | 仔鱼

A maternal mouthbrooder (Ref. 118638). Males construct territories in shallow water; where there was ample space they were similar in structure and grouping to those of Oreochromis variabilis, each territory consisting of a central raised mating platform in the middle of a large circular depression; males occupy these territories at sunrise, when water temperature was 12°C and they left for deeper water in the late afternoon when the temperature rose to 25°C (Ref. 2). It exhibits pseudo-spawning and then true spawning follows (Ref. 2). 非洲: 在坦尚尼亞的魯誇湖。

主要参考文献 Upload your references | 参考文献 | 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)

世界自然保护联盟红皮书 (Ref. 120744)

  次级保育类动物, 见 IUCN 红皮书 (VU) (D2); Date assessed: 31 January 2006

CITES (Ref. 118484)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

对人类的威胁

  无害处的





人类利用

渔业: 商业性
FAO(Publication : search) | FishSource |

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特别资料

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网络资源

Aquatic Commons | BHL | Cloffa | Websites from users | 核实 FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | ECOTOX | Faunafri | Fishtrace | GenBank(基因组, 核苷酸) | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | 树状分类阶层 | Wikipedia(转至, 搜寻) | World Records Freshwater Fishing | 动物学的记录

Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01738 (0.00744 - 0.04060), b=3.03 (2.83 - 3.23), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
回复力 (Ref. 120179):  中等的, 族群倍增时间最少 1.4 - 4.4年 (Preliminary K or Fecundity.).
脆弱性 (Ref. 59153):  Moderate vulnerability (39 of 100) .
价格分类 (Ref. 80766):   Unknown.