Category Archives: Cage Culture
A 2014 report on aquaculture in Egypt presents some interesting information:
- Despite the pressure on water, Egypt has the largest aquaculture industry in Africa with a market value of over $1.3 billion.
- The industry now provides 65% of the country’s fish needs, with virtually all the output coming from small and medium-scale privately owned farms.
- The main farmed fish is Nile tilapia and Egypt is the world’s second largest producer of farmed tilapia after China. Grey mullet and carp are also farmed, sometimes in mixed ponds with tilapia.
- From small levels of production in the early 1990s fish farming has expanded rapidly while capture fishing has remained fairly constant, even declining somewhat after peaking at the beginning of the 21st century.
- Aquaculture is also important in providing employment to an estimated 100,000 people of whom 50% are youth.
- With the exception of Fayoum, aquaculture takes place in the Nile Delta region and mainly around the Northern Lakes area.
Citation: Mur, R. 2014. Development of the aquaculture value chain in Egypt: Report of the National Innovation Platform Workshop, Cairo, 19-20 February 2014. Cairo: WorldFish.
An Industry Assessment of Tilapia Farming in Egypt
Dr. Adel A. Shaheen, B.V.Sc., M.V.Sc., Ph.D.
Professor of fish diseases & management Head Department of fish diseases & management
Faculty of Veterinary Medicine Benha University Moshtohor – Toukh – Egypt
2.5. Status of fish production in Egypt
Capture fisheries in Egypt are in decline due to; overfishing, pollution, illegal, unreported and Unregulated fishing (IUU), relaxation in the implementation of laws and regulations, lack of interest in clearing Straits and waterways, poor sustainable management of fisheries and aquaculture, illegal fishing operations of fry. In addition to the building of Aswan High Dam (that reduced the annual flood cycle of the Nile), the application of partial pond flushing, aeration and sex reversal are the major steps that contributed to the expansion,
intensification and growth of total tilapia production in ponds in Egypt.
The General Authority for Fish Resources Development (GAFRD) planned two-sided strategy aims to increase the productivity of freshwater aquaculture operations, while encouraging investment in marine aquaculture.
A cooperation agreement between Egypt’s General Authority for Fish Resources Development (GAFRD) and Vietnam’s Ministry of Agriculture and Rural Development (MARD) inked in May sets a framework for joint fisheries development. The protocol encourages researchers, trainers and quality control technicians in the two countries to share data, and calls for exchange visits of fisheries and aquaculture officials
An overview of tilapia culture by Leonard Lovshin, Auburn University. The presentation covers tilapia groups, origins, culture environments, feeding, reproduction, hybridization, grow-out, marketing, and global potential.
A new type of farming in Indiana is gaining in popularity. This farming uses water rather than water. Aquaculture, or fish farming, is the practice of raising or harvesting fish (or other aquatic life) in a controlled environment.
There are four culture systems where you can raise fish:
- Recycling Systems
Cage culture is a popular form of aquaculture that has many advantages that include resource flexibility, low cost, and simplified harvesting. This article focuses on cage culture.
Before investing any capital in a new business venture, it’s always good practice to do a thorough market analysis and develop a business plan. This will help you determine the size of the market, competition, and capital requirements. Markets are scalable from home consumption, to retail, to wholesale distribution.
After determining aquaculture farming is a viable interest for you to pursue, then the next step is to locate a body of water that will meet the biological and ecological requirements of cage culture. Lakes and quarries are possible sites. Some requirements to consider:
- Size of body of water – at least 1/2 acre, but preferably an acre of larger
- Water depth – at least 6 feet deep
- Water quality – determine pollution sources and surrounding topology
- Access to electricity – for aeration or other needs
- Access to site – by boat or vehicle
Consider the marketability of your product and your grow out site. In Indiana, tilapia is a popular fish because of its large size, rapid growth, and hardiness. Hybrid striped bass, catfish, rainbow trout, and largemouth bass are other candidates for cage culture.
Hatcheries / Fingerlings
Once you have selected your species (or species), you need to find a hatchery that can reliably provide high quality fingerlings at a fair price.
For a list of commercial suppliers, see the Indiana Dept. of Natural Resources website:
Cage size determined the number of fingerlings to purchase. You want 5 to 7 fingerlings per cubic foot. Cages come in all size, but the minimum depth should be 4 feet. Cages can be purchased or homemade. Cages range in cost from $150 to $500 per cage. The size of your fingerling will determine the mesh size you need.
Make sure you leave at least 10 feet between cages when you add them to your site. Cages must be in quiet areas (away from swimmers) and easily accessible.
The water for your cage system must contain adequate oxygen to support the fish you are growing. Natural water oxygen can be supplemented with aeration. The dissolved oxygen level and temperature of the site should be monitored closely.
Fish are shy animals and are easily subject to stress. You need to avoid stressing your fish to optimize their growth. Transport your fingerlings in a well oxygenated container.
Fish grown in cages rarely obtain enough natural food and are therefore dependent on feeds supplied by the farmers. Floating feed is the preferred feed type and hand feeding is best. Feeding the fish with the proper amount is key for optimal growth, water quality maintenance, and operational expenses.
Fish Health / Husbandry
Vigilant observation and proper fish handling techniques to reduce stress, help maintain culture conditions. Biofouling is a potential problem that can be prevented by proper maintenance. Diseases may occur from time to time. Evidence of fish disease includes skin discoloration, open wounds and lesion, fin erosions, spots, and
erratic behaviour. Seek a disease diagnosis from an accredited lab and follow the recommended prevention methods.
Fish should be harvested as soon as they reach marketable size. Make sure you minimize stress during harvesting and maintain fish in well aerated transport.
Continue your education by seeking out additional literature and by consulting with extension agents and other aquafarmers