The two photos show a model of phytoplankton and rotifer production as required for the reproduction of marine fish species. This unit has been placed in Bandar Emam Research Station, Iran.
As shown in the photos, each unit of the tanks has two compartments at two levels. The 300-liter upper compartment is used for phytoplankton production while the 4-m3 lower compartment is used for rotifer production. The stocking density in both tanks (phytoplankton and rotifers) should be compatible to ensure an effective combination.
The photo shows the first aerator unit introduced into Egyptian aquaculture during late 1990s. This single aerator was designed by the farm owner who is by nature a mechanical engineer whereas the manufacturing of this diesel-operator aerator was done in local workshop. Afterwards, the trade of imported aerators has flourished.
This photo shows a simple unit for the production and nursing of tilapia fry in Egypt. The whole unit is made of locally available materials, whether the structure or the incubators (made of clay pots). The estimated numbers of produced fry of this unit matches the size of the pond.
Ideally, before starting a production cycle, the hosting pond should be prepared to receive the swim-up tilapia fry produced in the unit including drying, water screening and fertilization.
The number of swim-up tilapia fry are released in the underneath pond and raised for enough time to reach the size of advanced fry or fingerlings.
Nile tilapia, Oreochromis niloticus has been highly recommended for aquaculture in Gabon due to its hardiness, high growth rate, easiness to breed in captivity, and before that the consumer preference. The photos show related issues to tilapia culture including tilapia ponds and harvest.
Review: Abdel Rahman El Gamal (Founder of the website and video channel)
There has been a growing interest in shrimp farming in Iran. During the time these photos were taken (year 2000), the two key farmed shrimp species were:
Indian white shrimp, Penaeus indicus which is believed the best candidate to be farmed in Khouzestan, Hormozgan and Sistan and Baluchestan provinces. The tolerance of this species to variety of farming species placed the species as the main farmed shrimp species in Iran. Green tiger shrimp, Penaeus semisulcatus has been chosen to be cultured in Bushehr and Khouzestan provinces.
Based on a more recent data, it is clear that the Indian white shrimp, Penaeus indicus and white leg shrimp, Penaeus vannamei have collectively produced 2.5% of total Iranian aquaculture production -by volume- produced from 2500 ha during 2008.
The photos show the harvesting and sorting of shrimp produced in a shrimp farm.
Video credit: G. Venkata Raju (India) Description: Abdel Rahman El Gamal
Source: www.fishconsult.org
This video shows the stop-logs used in the water management –in particular depth- in fish ponds in India. The same system was introduced from China into Egypt during 1980s before being changed to piping system.
As shown in this video, there are three pairs of slots that are incorporated in the shaft, one for the fish screen, the other two for the stop-log closure for the water outlet. The screen mesh would depend on fish size. As noticed, the area between the stop-logs is filled by compacted soil. For this particular video which brings in the use of this system in pond draining, reducing the water level in fish pond would depend on the number of log pairs to be lifted up. Removing all stop logs down to floor of pond is done when the pond is completely drained.
The photo shows the inspection of fishing net for the evaluation and determination process of optimal fishing effort for aquatic resources in Rwanda.
La photo montre l’inspection du filet de pêche pour le processus d’évaluation et la détermination de l’effort de pêche optimale des ressources aquatiques au Rwanda.
This photo shows a model of an awareness and training of grassroots fish producers grouped in associations operating in a fishing community in Rwanda.
Esta foto muestra un modelo de sensibilización y capacitación de los productores pesqueros Grassroot agrupados en asociaciones que operan en una comunidad pesquera en Rwanda.
The video shows a model of integration between duck and fish which has been carried out in Kafr El Sheikh, Egypt. The compatibility between ducks and fish has proven effective model of integration that results in maximizing the production and so profits in addition to diversifying the revenue of the farm. Moreover, a significant portion of duck feed is obtained from various organisms such as vegetation and aquatic insects. Also, the movement of ducks help aerates the water and may stir pond bottom releasing trapped phosphorus and bring it back in the system.
The management of such system is of top importance bearing in mind that ducks are warm-blooded animals while fish are cold blooded animals. The number of ducks should be just sufficient to fertilize fish pond as more ducks and so more dropping would upset water quality of the pond.
We can see that to different species of ducks –based on their color- which could be due to market demand. In such integrated system, there are some concerns related to human health. These concerns are mainly related to possible use of drugs for disease treatment in ducks and so the withdrawal period required for the production of safe food for human consumption.
Note: this video does not show the duck house in which ducks stay during night and receive their prepared diets
Video credit: Hussein Ali Mohammed Alshihi (Sultanate of Oman)
The video shows the facility of the World Fish Center (Abbassa – Egypt). The outdoor facilities include earthen ponds of different sizes that range from 400-m2 – 2000-m2. The green house area -annexed to the main building- include concrete tanks of various sizes which are used for training and research. The main building includes more facilities that are not shown in the video including dry and wet laboratories, library, training facilities and auditoriums. There are housing facilities for the staff and the residency training programs. There is also dining facility. The landscape area has an adequate space for recreation purposes.
