Mar 03 2014
Credit: Ismael Radwan (Egypt) The photo shows the facilities what are in use during the hormonal treatment of Nile tilapia, Oreochromis niloticus. One may notice that the relatively small size of tanks which enables the matching with the possible number of treated tilapia fry keeping in mind that the fecundity of Nile tilapia (no. eggs/female) …
Permanent link to this article: https://fishconsult.org/?p=10472
Jan 30 2014
Credit: Ismael Radwan (Egypt) The male hormone (17 alpha- methyl testosterone) is dissolved in alcohol at the dose of 60 milligram per 500 ml of alcohol and then after the alcohol containing hormone is to be mixed with one kg of fry feed. Treated feed is dried in shade and could be stored in freezer …
Permanent link to this article: https://fishconsult.org/?p=10318
Jan 28 2014
Credit: Ismael Radwan (Egypt) The four photos show types of fish farming facilities that are commonly found in Benin. Earthen ponds are commonly found as represented by the farm photo which utilizes a modest water flow throughout the year. The farm of concrete tanks is located in Torri Posseto province. Hapas are also used whether …
Permanent link to this article: https://fishconsult.org/?p=10288
Jan 17 2014
Credit: Ismael Radwan (Egypt) As established, the effectiveness of sex reversal process depends on several factors including the initial size (age) of treated fry. If the tilapia spawning and collection systems of the fry cannot guarantee the optimum size (age) of tilapia fry, a grading system will be required. The photo shows a simple grader …
Permanent link to this article: https://fishconsult.org/?p=10277
Jan 17 2014
Credit: Lo Oumy Seck (Senegal) This photo shows a governmental fish farm that belongs to the Department of Saint Louis and located in Gniling Mbaw village. The farm consists of circular fiberglass tanks for the nursing of the fry of Nile tilapia, Oreochromis niloticus while the concrete tanks that appear in the back are used …
Permanent link to this article: https://fishconsult.org/?p=10254
Jan 16 2014
Credit: Lo Oumy Seck (Senegal) The photo shows the only hatchery for Nile tilapia, Oreochromis niloticus in Senegal. This hatchery is governmental and located in Région de Saint-Louis, département de Richard-Toll. According to the most recent statistics, 880,000 tilapia fry were produced in this hatchery to meet the demand of private and governmental fish farms. It …
Permanent link to this article: https://fishconsult.org/?p=10258
Jan 13 2014
Credit: Ismael Radwan (Egypt) The photo shows a typical fish pond in Benin whereas such dug ponds of 200-300 m2 are filled by seepage while pumping is used to drain the pond. Usually the farm size ranges from 2-3 acres. The overall productivity usually does not exceed 2 tons/hectar of tilapia whether in monoculture system …
Permanent link to this article: https://fishconsult.org/?p=10246
Jan 10 2014
Credit: Lo Oumy Seck (Senegal) This earthen pond belongs is a hatchery which in turn belongs to Richard-Toll station (Saint Louis) in the north of Senegal. The station produces about 100,000 of 2-g fingerlings of Nile tilapia (Oreochromis niloticus) every year. Moreover, fingerlings of African catfish, Clarias gariepinus are also produced. While fry feeds mainly …
Permanent link to this article: https://fishconsult.org/?p=10234
Jan 10 2014
Credit: Lo Oumy Seck (Senegal) The photo shows a unit of cage farming in Senegal River. Cage aquaculture was first practiced at experimental level in Senegal in 1984. However, for variety of reasons, the outcomes during the early practices were not satisfactory. From the year 2000 onward, the practice witnesses some improvements as represented in …
Permanent link to this article: https://fishconsult.org/?p=10231
Dec 23 2013
Unlike most overwintering systems whereas concrete or fiberglass tanks are commonly used under greenhouses, you will see in this videos the overwintering of Nile tilapia, Oreochromis niloticus takes place in hapas placed in earthen ponds. This system is far economical and more practical especially overwintered fish continues to be in the nursing or holding ponds …
Permanent link to this article: https://fishconsult.org/?p=10182
