This video shows how the 2-person crew check the spawning of Nile tilapia (Oreochromis niloticus) in open hatchery system using hapas in earthen ponds. The crew are working at both sides of the spawning hapa. The gradually crowd tilapia broodstock to facilitate their handling. The intervals between checking depend on water temperature and target product whether fry and/or eggs.
Permanent link to this article: https://fishconsult.org/?p=2906
Mar 11 2012
Post harvest practices of farmed tilapia in Egypt – Video
Credit for the clip: Samuel Simon Zigizo (South Sudan) Description: Abdel Rahman El Gamal
As the awareness on fish quality and safety increases among fish farmers in Egypt, post harvest procedures have significantly developed. The video shows tilapia how tilapia harvest is transferred in netting scoop nets and placed temporary into a tank whereas crushed ice is spread over the fish before placing fish into plastic baskets for weighing before being iced and loaded on the truck to be taken to the target market. Immediate icing after harvesting enhances the management of Rigor mortis and hence will maintain the high quality of harvested fish. This post harvest procedures will be sufficient for local marketing whereas the distance between production sites and target market is relatively short that ranges from 10s to few hundreds of kilometers.
Permanent link to this article: https://fishconsult.org/?p=2900
Mar 11 2012
Counting and transporting Pangasius fingerlings in India (Video)
Credit for the clip: Indian farmers and G. Venkata Raju (India) – Description: Abdel Rahman El Gamal
This video shows the procedure of counting, loading and transporting of Pangasius fingerlings in India. What could be distilled from the video is the large number of counters (males and females) which will ultimately lead to shorten the handling period and minimize possible stress. From management point of view, it is clear that number of counted numbers of fingerlings per bucket is fixed which enables a reasonable accuracy in the calculation upon loading the fingerlings on the fish transportation truck.
Permanent link to this article: https://fishconsult.org/?p=2894
Mar 11 2012
Harvest of Indian carps (India) – Video
Credit: Indian fish farmers and G. Venkata Raju (India)
Labeo rohita (Rohu) and Catla catla (Boche) are two popular fishes among the Indian Major Carps in fish farming practices. The production ranges between 15 – 20 ton/ha at the places where the carp farming is going on in commercial way. The farmers use conventional feeds and sell the product @ Rs. 45 – 50 / kg (Farm gate price). Usually, the uniform harvestable size of fish is around 1.5 kg. The farmer groups in the region programme the crop periods and harvesting schedules in such a manner that no shortage of fish supply in any part of a year to grab the market potential.
Permanent link to this article: https://fishconsult.org/?p=2887
Mar 11 2012
Fish Packing and Transport in India (Video)
Credit: Indian fish farmers and G. Venkata Raju (India)
Andhra Pradesh is one of the states of India which supply large quantities of food fish (carp) in other states of the country and neighbouring countries like Nepal, Bhutan and Bangladesh. For that purpose, the fish harvested has to be transported (by road) to the distant places (more than 2,500 km). Sometime, it takes more than 15 days travel period. Every day, more than 200 truck-loads of fish are lifted to meet this demand. Therefore, packing of fish has taken important role for ensuring food safety.
Permanent link to this article: https://fishconsult.org/?p=2881
Mar 11 2012
Harvest of catfish (Pangasius) in India (Video)
Credit: Indian fish farmers and G. Venkata Raju (India)
Catfish (Pangasius) has been introduced a few years back as an alternative species in the brackish water shrimp ponds due to its survival and fast growing nature in the hard pond environmental conditions. Fry level seed has been brought from Bangladesh and successfully reared to marketable size. Initially, farm gate price was Rs. 40 – 50 / kg against the production cost of Rs. 30 / kg. Due to comparatively good margins, many farmers started catfish mono-culture in freshwater carp ponds and some farmers have intensified with production as high as 60 ton / ha. At one point of time, markets were flooded with catfish stocks bringing down the price to Rs. 30 / kg. Further consumers are not interested in catfish (compared to carp fish) due to high oil content. Soya bean cake is the chief feed Ingredient used in the feed component.
Permanent link to this article: https://fishconsult.org/?p=2873
Mar 10 2012
Intensive cage farming of Nile tilapia and African catfish in Lake Chad (in French)
This project proposal has been developed by a working group who participated in Fish Culture Development training course in 2011 under the supervision of Dr. Abdel Rahman El Gamal. The main focus of this project proposal is cage farming of Nile tilapia (Oreochromis niloticus), and African catfish (Clarias sp.) in Lake Chad. The document included the rationality of the project, as well as the technical and economic issues.
[important]Intensive cage farming in Lake Chad[/important]
Permanent link to this article: https://fishconsult.org/?p=2866
Mar 10 2012
Desert aquaculture for Nile tilapia, Oreochromis niloticus integrated with agricultural crops in Egypt- Part 3- water quality management
Credit: Mohamed El Gazaar (Egypt)
Supply of water, aeration and removal of solid wastes
As shown in the photo the supply of water is done at an angle of 45o. Placing the aerators at the same angle helps to circulate and move tank water in one direction which will lead to better oxygenation of tank water as well as to get rid of solid wastes. The circular movement of tank water as shown in the second photo leads to the concentration of solid wastes at the tank center which will be easily discharged along with tank waters and eliminating the need for mechanical filters.
Note: We decided not to watermark the photos in order not to upset its clarity. However, we trust you will notify us if you wish to use a picture or more. This is expected and will be appreciated.
Permanent link to this article: https://fishconsult.org/?p=2851
Mar 10 2012
Desert aquaculture for Nile tilapia, Oreochromis niloticus integrated with agricultural crops in Egypt Part 2- Construction
Credit: Mohamed El Gazaar (Egypt)
The first photo shows two types of tanks during the construction phase while the second photo shows the concrete base of the fattening circular tanks.
Intermediate tanks: The 150-m3 rectangular tanks are used for the production of Nile tilapia juveniles of an average weight of 50-g which are required for fattening phase. These intermediate tanks are constructed of walls of bricks over a concrete base.
Fattening tanks: these 250-m3 circular tanks are made of bricks for walls which are constructed above 30-cm concrete base. Advanced fingerlings (juveniles) produced in the intermediate tanks are stocked in the fattening tanks and grown for about 4 months till harvesting whereas average harvest weight is about 400 g.
The photos 3 and 4 illustrate alternative construction materials such as replacing the red bricks by limestone bricks in the construction of tank walls. The other photo illustrates the possibility of having concrete walls. Usually, chosen tank construction methods is based on the availability of construction materials and hence the economics of the project.
Cement mixed with water sealants is used to coat the tank and prevent water losses through seepage through tank walls.
Aquaculture in the present project utilizes 20% of the total project area. Hence, 80% of the area is devoted to agricultural crops.
Note: We decided not to watermark the photos in order not to upset its clarity. However, we trust you will notify us if you wish to use a picture or more. This is expected and will be appreciated.
Permanent link to this article: https://fishconsult.org/?p=2846
Mar 10 2012
Desert aquaculture of Nile tilapia, Oreochromis niloticus integrated with agricultural crops in Egypt Part 1- General features
Credit: Mohamed El Gazaar (Egypt)
The first photo shows tilapia harvest of grow-out tank in a desert fish farm with a production capacity of 120 tons of fish/year. The production practices are intensified in this farm whereas production ranges from 28-32 kg of tilapia/m3 during a 4-month growing season. The underground water of a temperature of 23C, it is possible to achieve about 2.5 production cycles/year such as the case in this farm. Because as usual, there is no drainage system for waters in desert, the integration between aquaculture with agriculture system is necessary. The agricultural component should be capable to absorb and utilize the water discharge from aquaculture facility. Because of the fertilizing merit of aquaculture water, its use in agriculture enhances its economics and reduces the need and so the costs of chemical fertilizers. The agricultural crops that could integrate with aquaculture vary according to technical as well as economic factors. In the present project, it has been found that tomato sans cantaloupe were the best compatible agricultural crops. The second photo shows the tomato plastic tunnels that are used to protect tomatoes during cold periods.
Please note there are two more posts (Part 2 and 3) that are related to the present project which address the construction and management issues.
Note: We decided not to watermark the photos in order not to upset its clarity. However, we trust you will notify us if you wish to use a picture or more. This is expected and will be appreciated.
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Permanent link to this article: https://fishconsult.org/?p=2838