Abdel Rahman El Gamal
Author's posts
Jan 02 2012
Farming of salmon (Atlantic and coho) and rainbow trout in off-shore cages in Chile
Credit: Gabriel Salvo (Chile) These two photos illustrate models of off-shore cages. Such cages could be square with approximate dimension of 15-30 meter per side and circular cages with diameters that range from 15-30 meters. Depth of cages ranges from 10-30 meters. The principal species farmed in these cages are Atlantic salmon, Salmo salar, Coho …
Permanent link to this article: https://fishconsult.org/?p=2172
Jan 01 2012
Cage farming of salmon (Atlantic, coho, king), or rainbow trout in Chile
Credit: Gabriel Salvo (Chile) The photo shows a model of cage farming in Chile. Depending on water bodies and quality, the principal species produced in cages in Chile are Atlantic Salmon (Salmo salar), Coho Salmon (Oncorhynchus kisutch), King Salmon (Oncorhynchus tshawytscha) and Rainbow Trout (Oncorhynchus mykiss). Monoculture is the only system practiced in cage farming in Chile. Note: …
Permanent link to this article: https://fishconsult.org/?p=2161
Dec 26 2011
Artificial spawnining of African catfish, Clarias gariepinus (hormonal injection) – Video)
The video shows the injection of an African catfish (Clarias gariepinus) female. You may notice the small-medium size of female broodstock, the place of injection (dorsal part) and covering fish eyes as a means of calming. Anesthesia may be required especially in larger broodstock. Note: the credit of these video clips goes to colleagues who …
Permanent link to this article: https://fishconsult.org/?p=2154
Dec 26 2011
Sampling of Nile tilapia, Oreochromis niloticus in earthen ponds in Egypt (Video)
This video clip on sampling of Nile tilapia, Oreochromis niloticus shows clearly the morphological characteristics of a 300-400 g specimen of Nile tilapia especially the bands on the tail. Note: the credit of these video clips goes to colleagues who participated in aquaculture training courses organized by the Egyptian International Centre for Agriculture (EICA). I …
Permanent link to this article: https://fishconsult.org/?p=2147
Dec 25 2011
Final harvesting of Nile tilapia, Oreochromis niloticus in earthen ponds in Egypt (Video)
This video shows the last batch harvest of Nile tilapia (Oreochromis niloticus) in a medium size earthen pond (about 1-ha). For quality aspects, fish producers try their best to carry out most of tilapia harvest in 30-40 cm-water depth. However, regardless the fishing gears, there will be always left over tilapia in earthen ponds and …
Permanent link to this article: https://fishconsult.org/?p=2124
Dec 20 2011
Sea cucumber – Storage of sand fish (Holothuria scabra) broodstock
Credit: Rayner Pitt (United Kingdom) Sand fish (Holothuria scabra) Broodstock storage in sea pens and cages, in lobster farming area (2001). 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 …
Permanent link to this article: https://fishconsult.org/?p=2118
Dec 20 2011
Sea cucumber – nursery of sand fish (Holothuria scabra)
Credit: Rayner Pitt (United Kingdom) Sorting small batches of sandfish (Holothuria scabra) juveniles for nursery rearing experiments in outdoor tanks (2002). 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 …
Permanent link to this article: https://fishconsult.org/?p=2110
Dec 20 2011
Sea cucumber – Breeding of sand fish (Holothuria scabra)
Credit: Rayner Pitt (United Kingdom): Wild-caught sandfish stored and on-grown in a farmer’s pond before being used for breeding experiments (2000). 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 …
Permanent link to this article: https://fishconsult.org/?p=2103
Dec 17 2011
Ploidy induction in fish
This information bytes address the induction of triplody and tetraploidy fish including reasons, procedures and ploidy identification. [important]Ploidy induction in fish[/important]
Permanent link to this article: https://fishconsult.org/?p=2065
Dec 17 2011
Application of compensatory growth in fish
The role of fish hatchery is to produce healthy and high quality fry or fingerlings in sufficient numbers according to the operation plan of the hatchery. Therefore and in reference to the “compensatory growth” phenomenon in fish, hatcheries are not supposed to produce large-size fingerlinger on the cost of their number (unless economically justified). In …
Permanent link to this article: https://fishconsult.org/?p=2059