This lecture was delivered in the Fish Culture Development training course which started on April 2014. This course is organized by the Egyptian International Centre for Agriculture “EICA” and supported by Japan International Cooperation Agency “JICA”. The course hosts 16 African trainees from 11 African countries.
The lecture focused more on the management issues related to fish hatchery management. The lecture started with background information on different types of fish reproduction as well as parental care in nature and relates that to biological parameters such as fecundity. The biological information has been utilized in the commercial reproduction of farmed fish species and crustaceans. Natural spawning and artificial spawning are discussed. Key parameters affecting fish production were addressed in relation to types of fish hatcheries. Enhancing the productivity of fish hatcheries through management tools was discussed.
This lecture is an introductory lecture to the group projects and was delivered in the Fish Culture Development training course which started on April 2014. This course is organized by the Egyptian International Centre for Agriculture “EICA” and supported by Japan International Cooperation Agency “JICA”. The course hosts 16 African trainees from 11 African countries.
The lecture addresses various types of aquaculture projects in relation to physical and socioeconomic parameters as well as the consumer preferences. The technical and economic sides of aquaculture projects have been addressed. Case studies are included to illustrate that aquaculture projects like any other projects comprise various components such as biological, engineering, management, marketing and others and these components have to go in harmony in order for a given project to be successful. More emphasis is placed on the technical and economic feasibilities for aquaculture projects.
This exercise ended by forming four groups of the course participants. Each group has to choose two of the four proposed aquaculture and work on their projects till they present their projects and discuss it among the whole class and get feedbacks. If visitors are interested to see samples of group projects whether in English, French or Spanish, you are requested to visit the main menu of the site and then go to “aquaculture projects”.
Description: Abdel Rahman El Gamal (the channel and site founder)
This 6-minute video shows the harvesting process of gilthead seabream, Sparus aurata carried out in commercial off-shore cages in Turkey. We can see the harvest crew –with the help of a machinery- are pulling the seine and crowding the caged fish for easier handling whereas fish are scooped using a long-handed scoop net and placed immediately in iced water in the white boxed in order to maintain the freshness and the high quality of harvested fish.
This lecture was delivered in the Fish Culture Development training course which started on April 2014. This course is organized by the Egyptian International Centre for Agriculture “EICA” and supported by Japan International Cooperation Agency “JICA”. The course hosts 16 African trainees from 11 African countries.
This lecture introduces the fishery sector in Egypt with a special emphasis on aquaculture. The development of aquaculture as well as the mode of development has been focused on including leading aquaculture species, production basket, farming system and marketing. Relating Egyptian fish production to fish production in Africa is presented. The lecture brought up the status of fish production in relation to the national strategy.
The lecture emphasized on the principal natural resources related to aquaculture development and the rationality of intensification of aquaculture practices as well as the integration and/or integration with other agricultural crops.
The two photos show hatchery and nursery facilities for the production of tilapia fry. The facility is owned by a farmer in the Asuogyaman District of Ghana. One photo shows the egg incubation unit of farm (03) found in the Asuogyaman District of Ghana. Eggs of Nile tilapia, Oreochromis niloticus that are collected from tilapia brood stock in earthen ponds are incubated in this facility. The incubation unit is locally manufactured by the farmer using some local materials. The big black receptacle on the ground is a poly tank with PVC pipes overlaid to channel water into the system through a plastic bucket with perforation at the bottom. Connected into the poly tank are two transparent plastic receptacles holding harvested tilapia eggs.
The second photo shows concrete tanks with hapa’s used as a nursery facility for tilapia fry. The Dimension of each tank is 4m ×12m; however divided into three (3) compartments. Total numbers of tanks are twelve (12). Dimensions of hapa’s are 3m × 3m each. The source of water is the Volta Lake.
Out of this facility, the farmer produces his own fingerlings to feed the cages in his farm since he does not get adequate fingerlings supply to stock his cages. Total number of cages is sixty (60) of dimensions 6mx6m×6m.
Review: Abdel Rahman El Gamal (founder of the site and channel)
This video was filmed in a shrimp hatchery in Vietnam.
The artificial inseminating in shrimp implies the mating of selected individuals for mating and hence obtaining a regulated supply of fertilized eggs as required for the shrimp farming industry as well as for various genetic programs.
The success of the artificial insemination and the subsequent high rate of fertilization depend on the proper selection of brood shrimp to ensure that females should have full ovarian development, while males should have full and healthy spermatophores.
As shown in the video, male spermatophores are manually ejected by applying gentle pressure to the base of the outer corner of the spermatophore until it slips out of the genital pore. The ripe shrimp female is carefully held so that her thelycum is exposed (not shown). The first spermatophore is placed and secured anterior to the thelycum between the base of the third and fourth pereopods while the second spermatophore is placed and secured posterior to the thelycum between the base of the fourth and fifth pereopods. The glutinous material surrounding the spermatophore structure are spread using an index finger to cover the thelycum. The whole insemination process should be completed very fast to reduce possible handling stress to the female.
The spawning is usually imminent within about 1 to about 24 hours after the insemination conditioned to placing shrimp females in spawning tanks of seawater with optimum salinity 25-36 g/l and temperature (26° to about 30° C).
The photo shows circular cages on the Volta Lake located in the Asuogyaman District of Ghana for the culturing of Nile tilapia, Oreochromis niloticus. Total number is five (5). Three (3) have a dimension of 40m circumference ×7m depth whilst the other two (2) also have a dimension of 60m circumference x7m depth. In between the cages is a walkway made from local materials of wood. One of the photos shows the cage workers on the walkway while carrying sacs of fish feed.
Directly opposite the cages is the serene mountainous scene in the area intertwined by Volta gorge created by the construction of Akosombo dam in the District which is also noted for its diverse tourist sites.
Video provided for publishing by: Carolyn M. Chinguo (Malawi)
Review: Abdel Rahman El Gamal (founder of the site & video channel)
Even though Chichewa is the language of this 9-min video, visitors who are not Chichewa speakers can become acquainted with the fishery activities in Lake Malawi. This may include the traditional fishing boats (rowe and motorized), fishing fleet and gears. An interesting observation is carrying pressurized kerosene lanterns. Fishermen are using these lanterns during night fishing to attract fish to their nets. The video show some activities that take place in the fishing community including sun-drying of fish as well as the net making.
The photos show men while packing of tilapia fingerlings in oxygen-filled plastic bags and getting it ready for transportation for the stocking in Nkhotakota district. Tilapia fingerlings were collected from an earthen pond shown in the photo. Tilapias farmed in Malawi belong to three tilapine species which are namely Nkhututu (Oreochromis shiranus), Nungutchale (Tilapia rendalli) and Chambo (Oreochromis karongae). The African catfish (Clarias gariepinus) is also cultured. Small-scale farmers prefer Nkhututu for its prolific breeding and Nungutchale because of its feeding habits. The culture of Chambo is not common among the small-scale farmers because of its very low fecundity compared to the other fish species. Typically, fish fry is commonly transported in oxygen-filled plastic bags while transportation occurs either at night or early in the morning. The green fence seen around the earthen pond is just used to control potential invading predators. The facility shown in the photos is privately owned and it is in Zomba district.
The first photo shows the culture of Nile tilapia, Oreochromis niloticus in floating cages placed in Lake Volta in the Asuogyaman District of Ghana. Typical cages in Lake Volta are square of 5 m x 5 m with a depth of 5 m. The photo shows water lily which relatively causes a nuisance on the water body.
The second photo that is closer to the cages shows the feeding of caged fish as done by cage feeder who is using a local planked 6-m canoe.
