Sep 11 2012
Credit: Faiz Muhammad (Pakistan)
This PDF file represents the Ontogenesis of the main organs in whiteleg shrimp, Litopenaeus vannamei. The whole research program was conducted in College of Marine Life Sciences, Ocean University of China.
Ontogenesis in whiteleg shrimp
Permanent link to this article: https://fishconsult.org/?p=5624
Sep 10 2012
Credit: Glenda Vélez Calabria (Colombia) Description: Abdel Rahman El Gamal and Glenda Vélez Calabria
El Róbalo se conoce también como robalo, pez sargento o también como pez de jabón. En el pasado, aunque esta especie era popular en la pesca deportiva, no era apreciado por los consumidores, dado a su sabor jabonoso desagradable cuando lo cocinaban con la piel, o aun cuando la piel quedaba parcialmente pegada a los filetes. Una vez que limpien el filete, este es considerado un pescado excelente como alimento. Esto puede explicar por qué en la mayoría de las exhibiciones de pescado, el róbalo se vende como filete.
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.
Permanent link to this article: https://fishconsult.org/?p=5597
Sep 10 2012
Credit: Glenda Vélez Calabria (Colombia) Description:Abdel Rahman El Gamal and Glenda Vélez Calabria
Common snook (Centropomus undecimalis) are also known as robalo, linesiders, sergeant fish as well as soap fish. In the past, although the species was popular as a game fish, it was not appreciated by consumers due to its unpleasant soapy taste when cooked with its skin intact on even when the skin was partially attached to the fillets. Once the fillet has been cleaned, the fish is considered an excellent for consumption. This may explain why in most fish displays, common snook is sold in fillets.
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.
Permanent link to this article: https://fishconsult.org/?p=5589
Sep 09 2012
Credit for the photo: David Sykora (Paraguay) Description: Abdel Rahman El Gamal
The photo shows the packing of salted mullet (Mugil sp.) before marketing. Although salted mullet is consumed all-year round, the consumption during eastern is the highest peak of consumption because of inherited tradition. Usually, salted mullets are sold in special shops which sell salted fish which is in the same time the processor who carried out the salting process. In the past few years, few processors labelled their salted mullets which enabled their products to be displayed in supermarkets and to access regional markets where the demand on salted fish does exist. The sources of mullets to be salted are either capture fishery or aquaculture.
Permanent link to this article: https://fishconsult.org/?p=5577
Sep 08 2012
The majority of fish catch in lake Nasser belongs to about 10 species that collectively make up more than 95% of Lake Nasser catch. The predominant species sold as fresh fish are the tilapias and Nile perch, Lates niloticus, Labeo and Bagrus, while Alestes spp., Labeo spp., Hydrocynus spp., and Eutropius niloticus are salted. Salting takes place on the boats during fishing trips whereas 20-liter tins are used for this purpose. Fish salting for the mentioned species is done to add value to these species which enjoy better marked and consumer preference in its salted form. About 5-10% of Lake Nasser fish catch is salted.
Permanent link to this article: https://fishconsult.org/?p=5565
Sep 08 2012
Credit for the video: El Sadig Hagar (Sudan) Description: Abdel Rahman El Gamal
The video was taken in a marine hatchery, Alexandria, Egypt. The video shows feeding the broodstock of European seabass, Dicentrachus labrax with fish of low economic value such as by catch. Fish like most marine fish are mainly fed pelleted feed that meets the nutritional requirements of these fish especially in regard to protein and fat contents. However, producers strongly believe that an additional meal (bonus) of trash fish or squids will be required for successful reproduction of these species. The video shows the aggressive feeding of these fish which are carnivore fish.
Permanent link to this article: https://fishconsult.org/?p=5555
Sep 08 2012
This video focused on the indoor component of the closed system for tilapia aquaculture. The videos shows the water discgarge (effluents) from tilapia tanks located under a green house.Water discharge is pumped to an overhead reservoir and from there water is showered over the biological filter and then after to the grow-out tilapia tanks.
Permanent link to this article: https://fishconsult.org/?p=5540
Sep 08 2012
Credit for the video: Victor Hugo (Peru) Information source: Ismael Radwan (Egypt) Description: Abdel Rahman El Gamal
The video shows water cycle in a closed system of tilapia aquaculture. The video shows the upward pumping of the water discharged from the production tanks into an overhead reservoir which is the roof of the building in the same time. The downwards of water is done by gravity through 1/4-inch outlets which are evenly distributed over the reservoir bottom and pass the water to the biological filter which is located immediately underneath. The two bacteria groups colonizing the biological filter change the ammonia in the discharged water into nitrite which is toxic to fish while the second variety of bacteria (nitrobacter) converts the nitrite into nitrate which is not toxic to fish. Filtered water reaches the production tanks through 2-inch tubes. The deficit of system water they occurs for variety of reasons will be compensated through the pumping the underground water in quantities just enough to make-up the water deficit. Even though, this particular video shows the two pumps in operation, for most of the time, a pump will be in operation while the second is standby.
Permanent link to this article: https://fishconsult.org/?p=3659
Sep 08 2012
The video shows how tilapia fry is collected from concrete tanks which belong to a tilapia hatchery in Aswan. The method shown in the video targets to minimize the handling stress during this operation especially tilapia fry are delicate in relation to such operation. Fry collection starts with tank drainage till water level is significantly low. Water lowering is done gradually with no stops in order to force fry to follow the lowered water towards a collection sump located in the corner of the tank. Once fry are crowded in the catch sump, the fry are gently scooped out. The water sprayed from the fry end of the tank targets securing a continuous water current during the crowding process of tilapia fry.
Permanent link to this article: https://fishconsult.org/?p=5545
Sep 07 2012
Credit: Wanna Thawinwan (Thailand)
The culture of whiteleg shrimp, Litopenaeus vannamei, in Thailand follows two main farming systems in regard to water salinity. In the first system, the shrimp are farmed in normal salinity. In the low salinity system, a small area of the pond is separated from the rest of the pond using plastic sheets. This confinement is supplied by low salinity water of 5 g/l salinity in which shrimp post larvae are stocked and grown for 1-2 weeks before the plastic sheets are lifted up and the post larvae are free to access the entire pond.
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.
Permanent link to this article: https://fishconsult.org/?p=5531
