Aquaculture Development Association of Zambia - ADAZ

Focus session on aquaculture training and research at the Stellenbosch University on 04 March 2021.

Welcome! You are invited to join a webinar: AAM Focus: Stellenbosch University. After registering, you will receive a confirmation email about joining the webinar. Join us for a short power-discussion with personnel and students of the Aquaculture Division at the Stellenbosch University in South Africa. This division is known for its wide ranging work on trout, abalone, aquafeeds, aquaculture genetics, water quality, best practices and more.

ENTERPRISE Zambia will be conducting a seminar on 03 March at 15:00 hrs on the financing opportunities for inclusive aquaculture business models in Zambia.

See link: https://zoom.us/meeting/register/tJwqdOmvpzwiHtyTS9VJ7wijtfiDeZWxx7eE?_x_zm_rtaid=ifQX5PTnQuKqmvbCSIO0Ug.1614084743768.62cbfe86ddd2b726ea39fa1afd5e0b44&_x_zm_rhtaid=370


Also remember to click link below to register for the free-access webinar this week (25 February 2021) on aquaculture trends in Tunisia. We will be sharing information in this webinar around the upcoming (free) technical training in Aquatic Animal Health (4 sessions), as well as training in Practical Aquaculture Feed Management.

https://us02web.zoom.us/webinar/register/WN_p05t_ksDQT2Svo5RmZdbvQ

Welcome! You are invited to join a meeting: Financial support for aquaculture businesses in Zambia. After registering, you will receive a confirmation email about joining the meeting. ENTERPRISE Zambia will be conducting a seminar on the financing opportunities for inclusive aquaculture business models currently available for the Aquaculture sector in Zambia under its second call for proposals. The EU Funded ENTERPRISE Zambia Challenge Fund targets agribusinesses in Zambia who wo...

Currently!
TODAY
MONEY FM @93.7fm
FISHO MWALE TALKING AQUACULTURE AT 17.00hrs

ADAZ AGM tomorrow 26th February 2019.

Venus: Kalimba Reptile Park
Time: 08:30 - 17:00hrs
RSVP to 0978070076 or 0968091160

Note: transport will be provided for from Arcades to Kalimba at 08:00hrs.

Training between 8th to 10th August 2018.

Calling for Five (5) SME’s interested in attending a training on Food Safety Practices. This is a free three(3) days training being conducted at the University of Zambia with Certification upon completion.

Inbox us with what you do and if interested. No allowance will be offered but food and snack only.

Why eat fish? Take time to read through these well detailed researched benefits of Fish

11 Evidence-Based Health Benefits of Eating Fish This is a detailed article about the health benefits of fish. Fish is high in omega-3 fatty acids, and can help protect against many diseases.

Pond Construction Tips Cont...

Specific design considerations
1. Water sources used for fishponds
• Water sources can be spring water, seepage water, rainwater or run-off, tidewater (marine ponds), water from bore holes (wells),or water pumped or diverted from a river, lake, or reservoir.
Quantity of water needed
• Make a decision on the type of fish to be cultured and the size of ponds, so as to determine the amount of water required.
• Consider the climatic condition of the area, rainfall pattern, and nature of the soil when calculating quantity of water.
• A general rule is that pond water inflow and outflow should equal the pond volume over the period of a month. If inflow is too low, water quality may suffer from oxygen depletion and/or the accumulation of toxicants. However, if the inflow is too high, large amounts of beneficial algae may be flushed from the pond.
• As a rule of thumb, ponds should fill up in less than a week. For small ponds, e.g., ponds smaller than 200 m2, 1-inch pipe is recommended. A 400-m2 pond needs a 2-inch pipe, while a pond larger than 4000 m2 will require a 4-inch pipe
• Estimate the amount of water available from a specific source

Steps to constructing a Pond
1. Survey the land
2. Clear all vegetation from the site
3. Remove the topsoil from the site
4. Determine pond, drain pipe, and supply canal elevations
5. Peg out the pond, including core trenches, d**e tops, and d**e toes
6. Dig core trenches and pack them with good soil
7. Excavate the pond area
8. Build the d**es
9. Install the drainage system
10. Install the water supply system

Pond design and layout

General considerations
• Depends on the type of soil present and the intended culture practices.
• The water source must be able to keep the pond full throughout the culture period.
• Relatively shallow ponds are productive, but the shallow end should be at least 0.5 m deep to avoid invasion by weeds.
• It is always desirable to place screens on pond inlets and outlets to keep out predators, insects, and unwanted fish, and to retain the cultured fish.
• Every pond should be drain-able.
• Every pond should have an independent controlled inlet and outlet.
• Excavation of a core trench should be done where soils are less suitable.
• Perimeter and feeder roads are required to provide for movement of machines during construction and at harvest.
• If you plan to drive on the d**es, build them at least 3 meters wide on top, and wider at the base.
• Soil used to build d**es should always be compacted in layers.

FISH FARMING

Fish Pond design and construction
A typical earthen fish pond should be 300 m2. The main physical factors to consider are the land area, water supply and the soil water retention capacity.

Land area
The projected land for fish pond construction should be relatively level. Steeply sloped land is not suitable for building ponds. A slope of about 1% is ideal. A farmer should determine an area large enough for the present plans any future expansion. Such an area should not be prone to flooding. The selected area should not be subject to pollution in runoff from adjacent land. If possible, the land must be slightly lower than the water source, so that the ponds can be filled by gravity rather than by pumping.

Water supply
The most common sources of water used for aquaculture are surface waters (streams, springs, lakes) and groundwater (wells, aquifers). Wells and springs are generally preferred for their consistently high quality water. The quantity and quality of water should be adequate to support production. A good water source will be relatively free of silt, aquatic insects, potential predators, and toxic substances, and it will have high concentration of dissolved oxygen.
Warm water species like tilapia can tolerate water with lower dissolved oxygen levels, so tilapia culture is often done in static water, that is, without water flowing through the ponds. For earthen ponds, the water source should be able to provide at least 1 m3 of water (1000 liters) per minute for each hectare of ponds that will be built. If the selected site has relatively poor soils (i.e., soils containing too much sand) the source should be able to provide two to three times more water (2-3 m3 per minute per hectare).

Soil
Land should be comprised of good quality soil, with little or no gravel or rocks either on the surface or mixed in. Farmers should consider importing clay soil for compacting in the fish bottom, sides and core trench to minimize seepage. Soil that will be used to build the d**es must contain at least 20% clay so the finished pond will hold water throughout the growing period. Some soil with higher clay content—preferably between 30 and 40%—should be available nearby. It will be used to pack the core trenches in the d**es.
In absence of good soils, farmers should consider using dam liners or concrete during fish ponds construction.

Picture depicts a dam lined fish Pond.

FISH CAGE CULTURE
A cage is a culturing facility consisting of a framed net open at the top and floating on the surface, or when completely enclosed, the cage is kept below the water surface by adjustable buoyancy or suspension from the surface.
SITE SELECTION
Major factors to consider when selecting a site for cages:
 Water quality; Temperature, dissolved oxygen, pH and ammonia content

 Water depth; Minimum of 2 meters clearance below the bottom of the cage and
 Water current; Water current of 10-20 cm/sec

Fish Farming Tips:
b. Fish Farm Layout
 The layout of the pond system depends on:
 species for culture
 Size and shape of the area
 Number and sizes of ponds
Position of the water canals and gates.
c. Pond Design
Considerations when designing a fish pond
 Level of production
 Production system shall
 Use of fertilizers or fish feeds or both
 Fish species
d. Pond demarcation: follow picture illustration

e. Pond Construction
 Good site selection and pond demarcation will make pond construction much easier.
 Ultimately good pond construction will make pond management easier and prolong the life of the pond.