Sunday, April 12, 2015

Progress at Onavivi on the SSC Programme: January - March 2015






The Onavivi IAC is one of the largest Government centres, for fish breeding, fingerling distribution and feed production in the Northwest region of Namibia. The centre is currently carrying out three experiments, under the SSC project activities. These experiments   are Genetic selection, sex reversal and fish feed validation. The aim of the report is to highlight briefly on what has happened on each activities during the period mentioned above.

    1.      Sex reversal

The objective experiment is to identify the effective levels of hormone treated feed that will results in the production of 98% mono sex fish.  The experiment started with the conditioning of Broodstock, mating, egg collection, incubation, and nursing.   The experiment is being carried both indoor and outdoor conditions. The figures bellow illustrates the materials and methods used for the sex reversal experiment.
Preparing the pond for cages:
The pond was dried and poles where set in for anchoring the cages.

Figure 1. Pond preparation to set in cages for Broodstock conditions and matting
Figure 2. Cages set with Broodstock condoning and mating (ratio 3:1)

Figure3:  Egg collection
When the eggs are collected, they are sorted into different stages of development.  The eggs are then transferred to the incubators into the hatchery, as illustrated in the in the figure below.  

Figure 4:  Eggs collected and sorted in different stages of development
Figure 5: Incubation at Onavivi hatchery
Figure 6: Nursery stage, sex reversal indoor experiment, Onavivi IAC
Figure 7.  Nursery cages, sex reversal outdoor experiment, Onavivi IAC
Figure 8. Sampling the outdoor experiment, Onavivi IAC

        2. Genetic selection

The objective of the Genetic selection is to enhance the production of quality seeds but the use of different fish strains of Oreochromis andersonii. The three strains are from Kavango, Omusati (Cuvelai system) and Zambezi regions and are all under conditioning stage at Onavivi IAC. There after the mating will start, egg collection, incubation and then nursery. The pictures below shows the cages where the different strains of Oreochromis  anderstonii are being conditioned.

Figure 9.  Cages where the three strains are being conditioned

3. Feed validation

The aim of the experiment is to validate the quality of imported floating feed and the locally produced sinking feed with respect to the growth of Oreochromis andersonii, both at fingerling stages until they reach the marketable size. The experiment will be conducted in indoor and outdoor conditions. The mono sex fingerlings for the feed validation are so far being collected and conditioned.  Although there is a challenge of getting the required quantity and size of mono sex fish, the process is slow, but progressing.

 Indoor experiment
A diet of  42%CP  for  both floating and sinking are used in the plastic tanks, to assess the growth performance of three spot tilapia under plastic tanks, as illustrated below.

Figure 10.  Plastic tanks used for the feed validation experiment
Outdoor experiment
To assess the growth performance of three spot tilapia, until it reaches market size, cage culture is used as means of culture system.   A diet of 32%CP for both floating and sinking will be used. The diagram below shows the cages set in the cage platform at Onavivi reservoir.

Figure 11. Cage platform set in the Onavivi Reservoir for feed validation

                      Figure 12. Cages set in the Onavivi  reservoir for feed validation
Under the South South Cooperation project several equipment has been acquired with the aim to analyse the nutritional composition of the feed.  However due to the limited space (laboratory) where the equipment needs to be installed to be used for analysis was not possible. As a result the feed samples were sent to the local laboratory for analysis.  The laboratory is not suitable, as it is too small and does not have all the required platforms to install the equipment.  However, the Directorate of Aquaculture will see to it, if the budget allocation for 2015/2016 can assist in releasing funds for the renovation of the laboratory at Onavivi IAC. The picture, below show the layout of the current small laboratory with the acquired equipment.

Monday, April 6, 2015

KIFI Bridge Damaged by Seasonal Flood: March-April 2015

Damage visible to the KIFI floodplain bridge
Damage clearly visible to the rear section of the floodplain bridge at KIFI after the first pulse of the seasonal flood at the beginning of March 2015. This section of the bridge was not raised high enough and re-enforced with sement on the slope sides. This caused flood water to eat away the sides during flooding.

The level of water is rising again and will inundate the bridge again this week, the second week of April 2015. If the damage increase staff members will not be able to reach the boat launch or the pump station. 
First pulse of the seasonal flood inandating the bridge at the beginning of March 2015

Wednesday, April 1, 2015

Meetings & Events: February and March 2015

1. Third Quarterly Management Meeting: Directorate of Aquaculture and Inland Fisheries: Otjiwarongo, 2-5 February 2015

2. Administrative Management Meeting: Windhoek: 10 February 2015

3. Staff Meeting KIFI: 16 February 2015

4. Meeting with Headmen Muhero from Kamutjonga Village: 16 February 2015

Mr. Burger with Headmen Muhero from Kamutjonga Village
Headmen Muhero visited KIFI on Monday, 16 February 2015 to discuss issues effecting KIFI and the Kamutjonga village under the Hambukusu Tribal Authority. The meeting was attended by Headmen Muhero, his Secretary, Mr. Edward and several of his council members.  Mr. Burger (Deputy Director: KIFI), Mr. Sitengu (Chief Fisheries Biologist: KIFI) and Mr. Titus represented KIFI. Ms. Sakana a Ranger from Mahangu Game Park attended on behalf of the Ministry of Environment and Tourism. Sergeant Shanombe attended on behalf of the Namibian Police at KIFI. 

Matters arising from the previous meeting that was held on 21 February 2014 were discussed.Several new issues were added to the agenda for the meeting. The minutes of the meeting is available on request.

5. Poisons Workshop: Poppa Falls: 17-19 February 2015

6. Senior Management Meeting MAWF: 23 February 2015

7. Aquaculture Permit Stakeholder Meeting: Windhoek 26 February 2015

8. Minister's Staff Address: Windhoek 25 February 2015

11. Cooperative Advisory Board Policy Review Workshop: Windhoek ,11-13 March 2015

Honourable John Mutorwa, Minister of  the MAWF officially opening the CAB Policy Review Workshop
One of the major proposals discussed during this workshop was the creation of an Agency to deal with Cooperative issues

12. Ministry of Agriculture, Water and Forestry (MAWF) Sectoral Review and Planning         Workshop:Windhoek 24-27 March 2015

The review of MAWF’s ASEP took place in Windhoek from 24 March 2015 to 27 March 2015.  The ASEP contains desired outcomes and strategic initiatives to be pursued through various programmes and projects to ensure the successful implementation of the Fourth National Development Plan (NDP4).
Stakeholders to this sector was well represented and actively promoted the inclusion of four projects in the ASEP, namely the implementation of the rangeland management policy and strategy (five pillars for agriculture and one pillar for forestry), the common vision for the livestock and meat industry, as well as subsidised loans for debushing through Agribank.

MAWF staff and stakeholders attending the workshop

13. World Wetlands Day Celebrations: KIFI 25-26 March 2015