Credit: Glenda Velez Calabria (Colombia) and David Ramirez (Peru); Description: Abdel Rahman El Gamal
This video shows how female African catfish (Clarias gariepinus) is identified based on the reddish coloration of the genital papilla. The video also shows the examination of the sexual maturation and spawning readiness of African catfish which is usually done through the release of eggs under slight pressure on female’s abdomen. However, it needs to be noted that this particular video was taken during the month of November which is considered outside the natural spawning season of African catfish in Egypt.
Continue reading
Like this:
Like Loading...
Permanent link to this article: https://fishconsult.org/?p=3354
Credit: Glenda Velez Calabria (Colombia) and David Ramirez (Peru); Description: Abdel Rahman El Gamal
This short video clearly shows the projection of the male genital papilla of African catfish (Clarias gariepinus). This video was taken during the month of November which is considered outside the natural spawning season of African catfish in Egypt.
Continue reading
Like this:
Like Loading...
Permanent link to this article: https://fishconsult.org/?p=3344
The information related to the scholarship program for 12/2013 is found in the attachment. If you find in your self a potential candidate for this master fully funded scholarship, you are advised to contact directly the schloraship management. Good Luck
[important]La Caixa Scholarship Program[/important]
Like this:
Like Loading...
Permanent link to this article: https://fishconsult.org/?p=3332
Credit: Alejandro Perretta (Uruguay)
The early stages takes place indoor under controlled conditions (incubators) as seen in one of the photos. The incubation and hatching is done for imported fertilized eggs of sturgeon hybrids within the genus Acipenser.
As shown in the remaining photos, the Indoor-produced sturgeon fingerlings are moved to tanks of relatively small volumes located out-door roofed installations in an intermediate phase whereas fingerlings are stocked and grown until reaching appropriate size to be stocked in floating cages in the “Río Negro” in a fattening phase whereas fish are grown until average weight appropriate for slaughtering that is between 1-2 kg.
Even though feed used by the farm is considered confidential, it is believed that on-farm manufactured feed of about 35-38% crude protein is used with emphasis on its content of fish meal.
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.
Like this:
Like Loading...
Permanent link to this article: https://fishconsult.org/?p=3321
Credit: Alejandro Perretta (Uruguay)
These photos belong to a sturgeon farm that is exclusively dedicated to meat production of sturgeon in Uruguay. The farm is located in Rio Nigro in Departamento de Tacuarembó province. Farm facility includes indoor and outdoor facilities.
So far the complete reproduction cycle of sturgeon in Uruguay is at the research scale. However, there is a new project which targets to produced sturgeon seeds and sell it to other farmers. This initiative which is under evaluation by authorities at the moment if approved would eliminate the annual imports of fertilized eggs by individual farms.
Fish used for meat production in this facility are hybrids within the genus Acipenser. The farm has its own slaughtering facility. Similarly, feed used in the farm is manufactured by the farm itself.
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.
Like this:
Like Loading...
Permanent link to this article: https://fishconsult.org/?p=3310
Credit for the video: Samuel Simon Zigizo (South Sudan) – Description: Abdel Rahman El Gamal
This short video which shows the harvest of all-male of Nile tilapia (Oreochromis niloticus) indicates the high density of fish in the culture unit (cement tanks). Fish production in this specific farm ranges from 45-50 kg/m3. Handling of harvested fish is shown in the use of fish movers (dip nets) which are made of nets connected to metal rings. These dip nets are very efficient in moving the large biomass in the harvest seine for post harvest facilities.
Continue reading
Like this:
Like Loading...
Permanent link to this article: https://fishconsult.org/?p=3283
Credit for the clip: Samuel Simon Zigizo (South Sudan) – Description: Abdel Rahman El Gamal
This video shows the stripping of a female of African catfish, Clarias gariepinus. This practice takes place in artificial reproduction of the species and should be followed by artificial fertilization using testes taken from a sacrificed male. We are able to see in the video the free flowing of eggs under gentle pressure over the abdomen of female which indicates the right time of ovulation. Stripping as shown in the video should stop if blood is watched mixed with eggs. At this point, the spent female is placed in a recovery facility. Weighing eggs produced after the complete stripping is a classic means to determine the gonadosomatic index (GSI) for this particular female.
Continue reading
Like this:
Like Loading...
Permanent link to this article: https://fishconsult.org/?p=3272
Credit: Alejandro Perretta (Uruguay)
Upon the end of raceway phase in raceways when fish are at 6 years of age, sturgeon females are slaughtered and caviar (eggs) is obtained. The photo shows female fish which are prepared before slaughtering. A female when slaughters measures about 1.5 meter in length and weighs about 8 kg. Caviar represents about 20% of a female weight. Considering the high value of caviar, the meat of males and spent females –although very good- is considered a byproduct to caviar. Usually each farm has its own slaughtering plant for processing and packing of caviar and meat.
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.
[important]
[/important]
Like this:
Like Loading...
Permanent link to this article: https://fishconsult.org/?p=3252
This project proposal has been developed by a working group who participated in Fish Culture Development training course in 2009 under the supervision of Dr. Abdel Rahman El Gamal. The main focus of this project proposal is to develop an ornamental fish in Thailand. The document starts with ornamental fish keeping as a hobby and passed to the global trade of imports and exports of ornamental fish. A breif fact sheet on the recommended fish for this project was intoduced including its common name (Siamese fighting fish; Plakad in Thailand) and scientific name (Betta splendens) as well as food habits and geographical distribution. The rationality of the project, and selection criteria of the place were adequately covered in the document. The project objectives, activity chart, budget requirement and economic analysis were addressed in the project document.
[important]Betta Ornamental fish farm in Thailand[/important]
Like this:
Like Loading...
Permanent link to this article: https://fishconsult.org/?p=3242
Credit: George Triantaphyllidis, LAMANS (Greece)
This paper started with the background of marine aquaculture development in Greece starting in the early 1980s whereas the first hatcheries supplied the first fingerlings for on-growing in cage farms. In this part, the linkage between the EU strategy and the development of mariculture in Greece has been highlighted. Also, the foundations of the mariculture success in Greece have been itemized. Similarly, the socioeconomic impact of marine aquaculture has been addressed in this paper. Challenges that faced the development of marine aquaculture in Greece (e.g. price crisis) and means to address that was covered in the paper especially the approach of species diversification. This approach has been analyzed in the paper.
[important]Marine aquaculture is a success story in Greece[/important]
Like this:
Like Loading...
Permanent link to this article: https://fishconsult.org/?p=3231
Load more
