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Now showing items 21-30 of 34
Water quality, fish production and economics of Nile Tilapia, Oreochromis niloticus, and African catfish, Clarias gariepinus, monoculture and polyculture
Type: Journal Article
Tilapia is the main cultured fish species in Egypt, contributing 43.5% of farmed fish production and 24% of total fisheries production. The main problem facing tilapia producers is early reproduction before fish reach ...
Assessment of the impact of dissemination of genetically improved Abbassa Nile tilapia strain (GIANT-G9) versus commercial strains in some Egyptian governorates
Type: Journal Article
WorldFish initiated a selective breeding program in Abbassa--Egypt to develop and produce the genetically improved Nile tilapia strain known as “Genetically Improved Abbassa Nile tilapia (GIANT)”, adopting the same technology ...
Economic impacts of ponds management on water quality and growth performance of fish in polyculture
Type: Journal Article
The present study was conducted to evaluate the economics of the fish farms management under different systems and different water sources and its impact on the growth performance of fish in polyculture.
Production economics of Nile Tilapia (Oreochromis niloticus) pond culture in El-Fayum Governorate, Egypt
Type: Journal Article
Econometric techniques were used to estimate a production function for tilapia pond culture in El-Fayum Governorate, Egypt, utilizing cross-sectional field data. Explanatory variables were feed, initial stocking weight, ...
Genetic evaluation of growth and survival at 6 weeks old fry of Egyptian Nile Tilapia (Oreochromis niloticus) between improved Abbassa and commercial Manzala strains in a diallel crossing
Type: Journal Article
The main objectives of this study were to evaluate growth performance and estimate line crossing parameters of improved Abbassa tilapia strain and a commerciall Manzala strain within a complete diallel cross at 6 weeks old ...
A comparison of the fixed input and water quality analysis methods for optimizing fertilization requirements, minimizing costs and increasing fish production in polyculture ponds
Type: Journal Article
This study aims to find a proper fertilization method to optimize nutrient requirements and a proper fertilization strategy through determining the amount as well as the period of fertilizers addition, with an aim of ...
Some heavy metals concentrations in water and tilapia (Oreochromis Niloticus) muscles of fish farms supplied by three different water sources
Type: Journal Article
This study was conducted to assess and compare heavy metals contamination in muscle tissues (edible part) of fish cultured in ponds received fresh, agriculture and sewage drainage water which could poses a threat to human ...
Detection of Tilapia Lake Virus in Egyptian fish farms experiencing high mortalities in 2015
Type: Journal Article
The aim of this study was to detect potential pathogens in diseased tilapia that might account for the high summer mortalities observed in Egyptian fish farms. To this end, diseased fish were examined from eight farms in ...
Estimated costs and returns for commercial cage production of fingerlings and table-size mullet (Mugil cephalus) in Dakhlia Governorate, Egypt
Type: Journal Article
Large scale cage culture of mullet is new practice in Egypt and have not economically evaluated. The aims of this study are: to assess the economic potential of the actual practices of private mullet cage operations in ...
Increasing fish farm profitability through aquaculture best management practice training in Egypt
Type: Journal Article
Egyptian aquaculture production has grown rapidly to over one million tons per year so that it now provides most of the countrys fish supply. However, Egyptian fish farmers have received little extension advice or training. ...