>
Cichliformes (Cichlids, convict blennies) >
Cichlidae (Cichlids) > Pseudocrenilabrinae
Etymology: Oreochromis: Latin, aurum = gold + Greek, chromis = a fish, perhaps a perch (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
экология
; пресноводный донно-пелагический. Tropical
Africa: Pangani River in Kenya and Tanzania (Ref. 2, 52331, 118630), from Lake Jipe down to the Pangani Falls dam (Ref. 118638). Introduced in ponds at Korogwe (Ref. 2), thence distributed to several ponds and dams in Tanzania (Ref. 2, 54836), including near Tanga (Ref. 2), in the Usambara Mountains (Ref. 2), in Lake Singida (Ref. 2, 54836), and in dams near Dodoma (Ref. 54836).
Length at first maturity / Size / Вес / Возраст
Maturity: Lm ?, range 20 - ? cm
Max length : 50.0 cm SL самец/пол неопределен; (Ref. 2)
Краткое описание
определительные ключи | морфология | морфометрия
колючие лучи спинного плавника (общее число) : 17 - 19; членистые (мягкие) лучи спинного плавника (общее число) : 11 - 13; колючие лучи анального плавника: 3 - 4; членистые (мягкие) лучи анального плавника: 10 - 12; позвонки: 32 - 33. Diagnosis: A large bodied tilapia, with a slender body and small head and mouth; body depth 2.5-2.8 times in standard length (Ref. 4967, 118638). It can be distinguished by following characters: teeth of jaws with slender shafts in young, uniformly slender in adults; pharyngeal teeth very fine and crowded; dentigerous area with rounded lobes and short apex, its median length nearly always less than that of the blade; pectoral fin 34.3-41.2% of standard length, reaching base of anal fin; anal spines III-V (Ref. 2, 55060). Males and females are characterised by rows of blotched scales across the flanks; males have a pale blue head with dark spots, dark fins with pale spots, and orange margins to the dorsal and caudal; females and non-territorial males plainer and typically paler, and in some populations there is a more olive/yellow gular and ventral region (Ref. 118638). Caudal fin long with very definite vertical black or dark brown stripes (Ref. 55060).
Found in lakes and rivers (Ref. 4967). Chiefly a browser of periphyton in the lake, but additionally feeding also on bottom deposits and associated phytobenthos (Ref. 30832). A maternal mouthbrooder (Ref. 54046, 55060, 118638). Occasionally territorial (Ref. 2). It supports artisanal fisheries in lakes and dams across the Pangani catchment, with the largest fisheries in Lake Jipe and Nyumba ya Mungu (Ref. 118638). IUCN conservation status is critically endangered due to its restricted range and evidence of declining stocks between the 1970s and 2000 (Ref. 118638).
A maternal mouthbrooder (Ref. 54046, 55060, 118638). Breeding pits consist of a central pit surrounded by two or three series of smaller pits (Ref. 2, 55060).
Trewavas, E., 1983. Tilapiine fishes of the genera Sarotherodon, Oreochromis and Danakilia. British Mus. Nat. Hist., London, UK. 583 p. (Ref. 2)
Статус Красного Списка МСОП (Ref. 130435)
Угроза для людей
Harmless
Использование человеком
рыболовство: коммерческий; аквакультура (рыбоводство): экспериментальный
дополнительная информация
инструменты
Специальные отчеты
Скачать в формате XML
ресурсы в Интернет
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01905 (0.00827 - 0.04391), b=3.01 (2.82 - 3.20), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 2.0 ±0.00 se; based on food items.
устойчивость к внешним воздействиям (Ref.
120179): средний (среднего размера), минимальное время удвоения популяции 1.4-4.4 года (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (44 of 100).
