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1

Growth of Tilapia zilli exposed to sublethal concentrations of crude extracts of Azadirachta indica

100%
Omoregie E., Okpanachi M. A.
Acta Hydrobiologica
|
1992
|
tom 34
|
nr 3
281-286
The effects on growth of Tilapia zilli exposed for 12 weeks to sublethal crude extracts of Azadirachta indica was investigated in static bioassays and a constant aeration system. Weight increased with the decline of nominal concentrations of the extracts. Long-term exposure of T. zilli to sublethal concentration of the extract caused growth retardation. The exposed fish showed abnormal behavioural responses at 1.56 and 0.78 mg dm-3, these responses being minimal at lower concentrations. The use by local fishermen of extracts of A. indica to kill fish is therefore ill-advised.
2

Acute toxicity of water extracts of bark of the Neem plant, Azadirachta indica [Lodd] to the cichlid, Tilapia zilli [Gervais]

100%
Omoregie E., Okpanachi M. A.
Acta Hydrobiologica
|
1997
|
tom 39
|
nr 1-2
47-51
3

Parasite communities of the elongate tigerfish Hydrocynus forskahlii (Cuvier 1819) and redbelly tilapia Tilapia zillii (Gervais 1848) from Lake Turkana, Kenya: influence of host sex and size

84%
Otachi E. O., Szostakowska B., Jirsa F., Fellner-Frank C.
Acta Parasitologica
|
2015
|
tom 60
|
nr 1
4

Physiological and histological changes in Tilapia zillii [Gerv.] exposed to sublethal concentrations of the effluent of the Egyptian Copper Works

84%
Mourad M., Wahby O.
Acta Ichthyologica et Piscatoria
|
1999
|
tom 29
|
nr 2
73-80
The physiological and histological changes in Tilapia zillii (Gerv.) after exposure to sublethal concentrations of the effluent of the Egyptian Copper Works have been investigated. The results of acute toxicity test showed that the LC50 was 25 cm3/dm3, which means that this waste water is highly toxic. The results of physiological and histological changes in Tilapia zillii (Gerv.) showed that, fish were under considerable stress during exposure to sublethal doses of this waste water. Physiological response of fish revealed a significant disturbances in respiratory system, fish metabolism, and ionic osmoregulation. Pathological changes attributed to heavy metals were observed in the gills, liver, and kidney. Bioaccumulation of copper was highest in the liver, followed by the gills, and flesh. It is concluded that the waste water of the Egyptian Copper Works was not acceptable to discharge to drainage canal. Moreover, this plant should institute appropriate in-plant control to reduce emission of heavy metals.
5

Morphometric and meristic description of Tilapia mariae [Boulenger, 1901] and Tilapia zilli [Gervais, 1848] from the Umuoseriche Lake in the freshwater reaches of the Niger delta flood plains

84%
Anene A.
Acta Hydrobiologica
|
1999
|
tom 41
|
nr 3-4
6

Gyrodactylus malalai sp. nov. (Monogenea, Gyrodactylidae) from Nile tilapia, Oreochromis niloticus (L.) and Redbelly tilapia, Tilapia zillii (Gervais) (Teleostei, Cichlidae) in the Lake Turkana, Kenya

67%
Prikrylova I., Radim B., Gelnar M.
Acta Parasitologica
|
2012
|
tom 57
|
nr 2
Gyrodactylus malalai sp. nov. is described from the fin surface of cichlid fishes Oreochromis niloticus (L.) and Tilapia zillii (Gervais) caught in Lake Turkana (Kenya). The new species morphologically resembles Gyrodactylus nyanzae Paperna, 1973, but can be readily distinguished by the shape of the marginal hook sickles and the size of its hamuli. The sequence data of rDNA spanning partial 18S, internal transcribe spacer 1 and 2 and the 5.8S gene is unique within GenBank. Genetically, as most similar Gyrodactylus ergensi Přikrylová, Matějusová, Musilová et Gelnar, 2009 was found (97.5%). Moreover, a specimen of G. cichlidarum from O. niloticus, and a specimen G. ergensi from Sarotherodon galilaeus (L.) were collected during sampling in Kenya. Likewise, additional sampling of O. niloticus from the Blue Nile in Sudan revealed the presence of the newly described species. These findings represent the first records of gyrodactylids in both African countries.
7

Stocking based fishery enhancement programmes in Ethiopia

67%
Tigabu Y.
International Journal of Ecohydrology and Hydrobiology
|
2010
|
tom 10
|
nr 2-4
Fishery and aquaculture play an enormous role in reducing poverty and alleviating food insecurity at household level. The first fish stocking program in Ethiopia was reported as early as 1925. Indigenous Oreochromis niloticus, Tilapia zilli, Clarias gariepinus and non-native Cyprinus carpio, Carassius carassius, Carassius auratus, Ctenopharyngodon idella and Salmo trutta fish species were used for stocking. Even though most of the fishery enhancement programs are low-cost operations, they often seem to be very efficient actions. Fish harvested in the reservoirs Fincha and Amerti in Oromia region, lakes Haik and Ardibo in Amhara region and Hashengie in Tigray region, enhanced by stocking, contribute up to 15% of the annual fish production of the country. Thus fisheries programs challenging the growing protein-rich food demand should be considered as a necessary and valuable aspect of management strategy in all waters, independently from its major operational goal like hydropower or irrigation.
8

Acute toxicity of water extracts of bark of the neem plant, Azadirachta indica [Lodd] to the cichlid, Tilapia zilli [Gervais]

67%
Omoregie E., Okpanachi M. A.
Acta Hydrobiologica
|
1997
|
tom 39
|
nr 1-2
The effects of the extract on the mortality rate, opercular ventilation rate and some behavioural responses of T. zilli were investigated under laboratory conditions, over a 96 h exposure period. The 96 h LC50 was determined as 6.03 mg L-1. The extract led to an initial increase in the opercular ventilation rates which then decreased significantly (P<0.05). Prior to death, darkening of the exposed fish, erratic swimming, and respiratory distress were observed. The implication of these findings in relation to environmental pollution is discussed.
9

Variation in meristic characters of a tilapian fish, Tilapia zilli [Gervais, 1848] from the inland water bodies in Libya

67%
Jawad L. A.
Acta Ichthyologica et Piscatoria
|
2001
|
tom 31
|
nr 1
Meristic characters were compared in samples of the tilapian fish, Tilapia zilli (Gervais, 1848), collected from lake Ain Ziana, lake Tawrqa, and Ojala area, Libya. The significant difference in the number of vertebrae and the pectoral fin rays provide an evidence of the existence of three general groups or populations in the three study areas.
10

"Przeklęte" Jezioro Wiktorii - czyli co się stało z największym afrykańskim jeziorem?

51%
Bednarczuk R.
Nasze Akwarium. Miesięcznik Miłośników i Hodowców Ryb
|
2008
|
nr 08[101]
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