Source of the photo: Les merveilles de la science – Chapter Pisciculture, by: Louis Figuier.
Publisher: Furne, Jouvet et Cie. Year : 1869
Caption of the photo (in French): L’affranchi pollion faisant jeter un esclave aux murènes de ses viviers
Review: Abdel Rahman El Gamal
This is sad to review this tragedy that was happening during the Roman Empire in the 19th Century. Some of household slaves were executed because of very minor things such as breaking crystal glass.
Some of well-regarded Romans used to keep the moray eels as pets in special pools. The sad stories tell how condemned slaves were thrown alive into the pools and turn instantly a food to hungry morays. The other side of these sad stories tells that this way of execution was deemed to be unacceptable cruelty, even by Roman standards.
This video has been taken at the Egyptian Aquaculture Center (Kafr El Sheikh) during the Warm water fish production training course (2012). The video shows the packing of the hatchery produced fingerlings of African catfish, Clarias Gariepinus. Hatching technology for the mass production of catfish seeds have been developed in the World Fish Center – Egypt and then after disseminated to selected producers who take the responsibility to reach fish farms. In the recent years, the marketing of African catfish is developing positively in particular locations. Further development of catfish aquaculture requires variety of marketing campaigns especially to consumers who are still resisting consuming catfish.
Video credit: Amal Magga (South Sudan) Description: Abdel Rahman El Gamal
This video has been taken during the Warm water fish production training course. The video shows in details how the pituitary gland was successfully allocated and extracted. You will notice how the trainees tried to clean the gland location of whatever blood associated with the operation. You may also notice that after locating and identifying the gland, careful efforts was paid in order to keep the gland un-smashed and in the same time to avoid losing the pituitary gland among the tissues which happens sometimes. Even though I have no doubt that the second attempt will be much faster and easier, the present video will be helpful to who are practicing this task for the first time. It may worth mentioning that in order for the pituitary gland to be effective in the artificial reproduction of the species, it could be taken from sexually mature male or female and this to be done just prior to the spawning season. For practical reasons, sacrificed catfish males for getting their testes, can be also a source of pituitary glands.
Review: Abdel Rahman El Gamal (Founder of the website and video channel)
Realizing that Nile tilapia (Oreochromis niloticus) could be threatened during several nights in Northen delta region (e.g. Kafr El Sheikh) during winter season. During this sensitive period of time, water temperature may drop to 8 or 9 C for few hours during nights. In such systems, warming water indoors for overwintering will be a costly process. Instead, in this smart system, greenhouses are established in earthen ponds whereas plastic sheets cover the whole space of the greenhouse arches without being fixed to pond bottom. In this system, fish have the choice either to enjoy warmer temperature in the greenhouse zone during cold nights and can enjoy warmer temperature and graze for food during day time when temperature warms up. The greenhouse structure is fixed and hence, during warmer months, plastic sheets are rolled and the pond is managed properly with no obstacles except the greenhouse arches.
Video credit: Lylian Wilfred Lugobola (Tanzania) Description: Abdel Rahman El Gamal
This video shows fish sale by basket as promoted by some retail fish shops in Alexandria, Egypt. Each basket has one marine fish species. Usually fish are not iced indicating by fish sellers that fish are very fresh and are just caught and brought in. Even though, the sale is done by basket, sellers and buyers have enough experience about fish weight in the basket which is considered when negotiating or bargaining the price.
Video credit: Alain Murekambanze (Burundi) Review: Abdel Rahman El Gamal
Fish feed industry is witnessing a steadily development in order to cope with aquaculture development which is about a million tons at the present. Fish feed is produced through different types of feed mills. This video shows feed production in commercial feed mills which are furnished by extruders which enable the production of floating pellets. Most feed produced targets tilapia which represents the key farmed species. However, some of the feed mills have produced feed for marine fish and shrimp. Quality assurance systems such as ISO and HACCP have been approached and adopted by key feed mills.
Sources: C. W. Bishop, C. G. Abbot and A. Hrdlicka, Man from the farthest past. 1930.
Publisher: Smithsonian Scientific Series
Caption of the photo: Primitive canoes of the Australian aborigines. Bark canoes of various types are found in several widely separated regions.
The following paragraph is cited from the above source: The canoe proper, made by hollowing out a log, largely with the aid of fire, developed early, perhaps suggested by the accidental use of a hollow tree trunk. Such a discovery might conceivably be made more than once, wherever trees grew near water; at least the well-nigh world-wide distribution of the dugout canoe suggests this. From this improvement we can trace, step by step, the evolution of larger and larger craft, until we reach such triumphs of the shipbuilder’s art as the ocean steamer and the battleship of the present day.
Credit: Warm water Fish Production training course (2012)
This video shows the sampling of grass carp fingerlings in the Barrage (Kanater) Station, Egypt. This is a part of the whole program on the biological control of aquatic plants in River Nile and canals using grass carp. The Channel Maintenance Research Institute (CMRI) is in charge of this program. Sampling is routinely carried out to assess the growth rate of fingerlings and also to determine the time of release based on specified size. Other than CMRI hatcheries, grass carp fingerlings are also produced in several governmental hatcheries as required by CMRI.
Sources: E.B. Worthington, Man from the farthest past, 1938. Publisher: Smithsonian Scientific Series
Caption of the photo: Reconstruction of group of Swiss lake dwellings built over the water on piles. After Schmidt.
The following paragraph is cited from the above source: Real architecture first appeared during the Neolithic phase of man development. Men then learned to build not mere windbreaks or even huts, but groups of substantial timber houses with walls of bark or wattle-work daubed with clay. For defense, they build their villages over the water or surrounded them with strong stockades made of logs set on end, side by side, in the earth.
