Abdel Rahman El Gamal
Author's posts
Sep 09 2019
Adipose eyelids and their functions in fish
Photo credit: Marx Perfecto C. Garcia (Philippines) Review: Abdel Rahman El Gamal (Founder the website) The inserted photo shows the eyelid in a mullet specimen (Mugil sp.). There are several theories related to the possible roles of eyelids in fishes. It is generally accepted that the eyelids may play a role in affecting the vision …
Permanent link to this article: https://fishconsult.org/?p=15150
Permanent link to this article: https://fishconsult.org/?p=15147
Sep 06 2019
Removing the premaxilla of tilapia males
Review: Abdel Rahman El Gamal (Founder of the website) The removal of the premaxilla of bone of the upper lip of tilapia males goes back to the late 1970s. The purpose of such practice is to reduce the aggressive behavior of tilapia males and hence reduce the possible injuries and/or mortality of females during the …
Permanent link to this article: https://fishconsult.org/?p=15144
Aug 18 2019
Fish hatchery management (2019 updated lecture)
This lecture on the management of fish hatcheries was delivered in Fish Culture Development training course during August 2019. The lecture starts with general information related to the various modes of reproduction among aquatic animals of finfish, shell fish, mollusks and others including substrate spawners, mouth brooders till giving birth. The levels of parental care …
Permanent link to this article: https://fishconsult.org/?p=15128
Aug 18 2019
Natural spawning of tilapia in Madagascar using a simple practice
Photo credit: Marcel Jean Adavelo (Madagascar) – Review: Marcel Jean Adavelo and Abdel Rahman El Gamal (Founder of the website) As shown in the attached picture, the spawning tilapia pond is separated by a net with appropriate mesh size that retains the broodstock in a part of the pond while allows the produced fry and …
Permanent link to this article: https://fishconsult.org/?p=15126
Aug 18 2019
Intensive tank culture of tilapia in Egypt (Video)
Video credit: Fares Fares Arab (Egypt) and Marx Perfecto C. Garcia (Philippines) -Information source: Fares Fares Arab Description: Abdel Rahman El Gamal (Founder of the video channel) This video was filmed in an intensive fish farm located in Ismailia region, Egypt. The greenhouse has a dimension of 54×60 meters and hosts 42 grow-out circular tanks with …
Permanent link to this article: https://fishconsult.org/?p=15120
Aug 16 2019
Applications of genetics in aquaculture (2019 – an updated lecture)
This lecture has been delivered by Dr. Abdel Rahman El Gamal during August 2019 as a contribution to the “Fish Culture Development training course – Africa” which is annually organized by the Egyptian International Centre for Agriculture (EICA) with the support by Japan International Cooperation Agency (JICA). The introductory part of the lecture addressed the …
Permanent link to this article: https://fishconsult.org/?p=15116
Aug 12 2019
Use of gonad color in abalone sexing
The inserted pictures belong to Omani abalone, Haliotis mariae. In the absence of external signs of sexual dimorphism for the shell structure, the sexing of abalone cannot be done based on the external differentiation and is only determined through the visual inspection of gonads which could be seen if the foot and mantle are forced …
Permanent link to this article: https://fishconsult.org/?p=15107
Jul 26 2019
Development and outlook of Egyptian aquaculture (2019 updated version)
This lecture was delivered in aquaculture development training course hosted by the Egyptian International Centre for Agriculture (EICA). This updated lecture presents not only statistics of 2017 but emerging practices such as biosecurity system as well as specific issues has been highlighted in this lecture such as the problems facing the shrimp aquaculture. The contribution …
Permanent link to this article: https://fishconsult.org/?p=14902
Jul 26 2019
Spawning induction of rabbitfish (Siganus guttatus) in the Philippines
Photo credit: DO Xuan Hai (Vietnam) Description: Abdel Rahman El Gamal (Founder of the website) The inserted photos regarding the artificial reproduction of rabbitfish (Siganus guttatus) were taken during a training course conducted in the Philippines. The high economic value of this tropical food marine species encouraged its culture that relied mostly on the fingerlings …
Permanent link to this article: https://fishconsult.org/?p=14908