Posts or items in English language
Mar 19 2012
Credit: George Triantaphyllidis (Lamans, Greece) This photo shows a cage farm in western Greece. In fish farming of seabass and seabream in sea cages stocking density is between 20-30 kilos/m3 and leads to the production of marketable size fish (300-450 gr) in 14-17 months Note: We decided not to watermark the photos in order not …
Permanent link to this article: https://fishconsult.org/?p=3147
Mar 19 2012
Credit: George Triantaphyllidis (Lamans, Greece) This photo is taken from a typical cage farm in Greece for European seabass (Dicentrarchus labrax) and gilthead seabream (Sparus aurata). The cages are installed in depths of more than 30 m. Each cage has a perimeter of 60 meters. The net can go up to 10 meters depth. Every cage …
Permanent link to this article: https://fishconsult.org/?p=3141
Mar 19 2012
Credit: Rayner Pitt (United Kingdom) This photo shows one of the first sandfish (Holothuria scabra) pens that were constructed in Vietnam. Upon the construction, it was thought the pen walls had to stand higher than the surface of the sea. Later it was realized that fences standing only about 50cm above the sea floor were …
Permanent link to this article: https://fishconsult.org/?p=2440
Mar 19 2012
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 …
Permanent link to this article: https://fishconsult.org/?p=2990
Mar 19 2012
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 …
Permanent link to this article: https://fishconsult.org/?p=3061
Mar 19 2012
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 …
Permanent link to this article: https://fishconsult.org/?p=3066
Mar 19 2012
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 …
Permanent link to this article: https://fishconsult.org/?p=3073
Mar 17 2012
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 …
Permanent link to this article: https://fishconsult.org/?p=3036
Mar 17 2012
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 …
Permanent link to this article: https://fishconsult.org/?p=3023
Mar 15 2012
The pituitary gland extract is used in inducing the reproduction of African catfish (Clarias gariepinus). In order for the pituitary extract to be effective, donor fish should be sexually mature whether male or female. Also, the extraction of pituitary gland is preferred to be close to or within the spawning season. From practical views, extracting the …
Permanent link to this article: https://fishconsult.org/?p=2998
