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Category: Videos

Sex identification and spawning readiness of African catfish (Clarias gariepinus) female (Video)

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 …

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Permanent link to this article: http://fishconsult.org/?p=3354

Sex identification of African catfish (Clarias gariepinus) male (Video)

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. 

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Permanent link to this article: http://fishconsult.org/?p=3344

Harvest of Nile tilapia (Oreochromis niloticus) from an intensive fish farm in Egypt (Video)

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 …

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Permanent link to this article: http://fishconsult.org/?p=3283

Artificial reproduction of African catfish (Clarias gariepinus) – Egg stripping (Video)

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 …

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Permanent link to this article: http://fishconsult.org/?p=3272

Use of traditional water wheels in lifting water to fish farms in Egypt (Video)

Water wheels which were traditionally in use in agriculture are used in the present to lift water required to some fish farms in Egypt and some other countries. Based on water wheel users, it is claimed that water wheels are efficient in lifting water and also more durable with less incidences of breakdowns and operation …

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Permanent link to this article: http://fishconsult.org/?p=2990

Pond Construction (Earth Work) – India (Video)

Credit: Indian fish farmers and G. Venkata Raju (India) Pond construction by manual labour has been stopped. Earth work is undertaken by bulldozers and tractors. Bulldozers are used in the case of large scale excavations whereas tractors are used for the projects requiring the earth work not more than 200 ha generally. However, finishing work will …

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Permanent link to this article: http://fishconsult.org/?p=3061

Feeding behavior of Nile tilapia (Oreochromis niloticus) during grow-out (Video)

This video shows the feeding behavior of Nile tilapia (Oreochromis niloticus) whereas the feeding aggressiveness is obvious and will be always the case if fish are in good health and when the aquatic environment is close to optimum. This Tilapia has a small stomach and so would require a relatively long time to get its …

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Permanent link to this article: http://fishconsult.org/?p=3066

Pond construction and establishing a harvest ditch (Egypt) – Video

Credit of the video: El-Sadig Arbab Hagar (Sudan); description: Abdel Rahman El Gamal Looking at the fish farm size in Egypt and so pond size, using the machinery in pond construction is the practical option. The intensification level of farming practices greatly influence the size of fish pond. A pond of a hectar or slightly …

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Permanent link to this article: http://fishconsult.org/?p=3073

Collecting embryos from the mouth of a red tilapia female (Video)

Credit for the video: Fish Culture Development course (2010) – Spanish speaker group, description: Abdel Rahman El Gamal In mouth fish brooders such as the key farmed tilapia, a female incubates fertilized eggs till hatching. The incubation period is directly related to water temperature and can range from as short as 3 days to as long …

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Permanent link to this article: http://fishconsult.org/?p=3036

Artificial fertilization of the eggs of African catfish, Clarias gariepinus (Video)

Credit for the video: Emmanuel Ohene Marfo (Ghana)   Description: Abdel Rahman El Gamal Such as the case with silurid fishes, it is almost impossible to hand strip the sperm from the male of African catfish, Clarias gariepinus. Therefore and as seen in this video, testes of a sacrificed male are used for the artificial fertilization of catfish eggs. Testes …

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Permanent link to this article: http://fishconsult.org/?p=3023

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