Abdel Rahman El Gamal
Author's posts
Feb 23 2014
Sexing and reproductive habits of abalone with a special emphasis on Omani abalone
Abalones are dioecious (separate male and female sex) as abalones develop their eggs and sperm in gonads located under the soft skin visible between the foot and the shell. There is no sexual dimorphism of the shell structure and so the sexing of abalone cannot be done based on the external differentiation and is only …
Permanent link to this article: https://fishconsult.org/?p=10413
Feb 23 2014
Historic information- Herring fishery in London during 1935 and before
Source: The heart of England by: Ivor Brown year:1935 The description related to the photos reads: East Anglian chronicles are written, so to speak, in herring-bone. Herring were once currency on those shores; rents were paid in them and international affrays followed the Dutchmen’s pursuit of the shoals into English waters. …
Permanent link to this article: https://fishconsult.org/?p=10408
Feb 20 2014
Recovery plan of the European eel, Anguilla anguilla in the Guadalquivir River basin, Spain
Credit: Glenda Vélez Calabria (Colombia) The photos show a part of the program carried out in the University of Cordoba, Spain. The university program contributes to the EU-funded program on the recovery plan for the European eel in the Guadalquivir River basin. This project component includes two stages which are namely, field trips and determination of …
Permanent link to this article: https://fishconsult.org/?p=10402
Feb 18 2014
Fish trapping in the Northen lakes in Egypt
The two photos show tapping of fish using wire traps. Fish trapping is used in any of the four northen lakes in Egypt which are namely: Manzala, Burullus, Edku and Maryut. Water shallowness, and the spread of aquatic weeds favor the use of fish traps especially the cost of these traps is very low. Most …
Permanent link to this article: https://fishconsult.org/?p=10398
Feb 18 2014
Culture of crawfish, Procambarus clarkia in Louisiana, USA
The main farmed crawfish species are red swamp crawfish (Procambarus clarkii) or white river crawfish (Procambarus acutus). The essential elements in crawfish farming include traps and baits. The photo which was taken in a crawfish farm in Louisiana, USA during 1980s show a type of traps which was in use during 1980s. Trapping: Bait trapping is the only harvesting …
Permanent link to this article: https://fishconsult.org/?p=10386
Feb 17 2014
Enumeration of plankton using Sedgewick-Rafter chamber
This 2-slide information bite addresses the use and specifications of the chamber. The procedures of filling the chamber and so the microscopic examination has been addressed in details. http://fishconsult.org/wp-content/uploads/2014/02/Enumeration-of-plankton-using-a-Sedgewick-Rafter-chamber.pdf
Permanent link to this article: https://fishconsult.org/?p=10383
Feb 15 2014
Establishing a Station for the production of commercial and native fish seed in the municipality of Armer, Tolima, Colombia – in Spanish
This project proposal has been developed by a group who participated in Fish Culture Development training course in 2007 under the supervision of Dr. Abdel Rahman El Gamal. This project addresses the establishment of seed production station for five commercial and native fish species in Tolima, Colombia for the purpose of meeting the demand of fish …
Permanent link to this article: https://fishconsult.org/?p=10379
Feb 14 2014
Sampling of subsurface water in fish ponds
This 2-slide bite explains the sampling of subsurface water in a fish pond.The water sampler has been covered and illustrated and so the procedures in obtaining water samples at a specified water depth in an earthen pond. [gview file=”http://fishconsult.org/wp-content/uploads/2014/02/Sampling-of-subsurface-water-in-fish-ponds.pdf”]
Permanent link to this article: https://fishconsult.org/?p=10376
Feb 14 2014
Historic information – conservation measures of snails in Ahafo, Ghana
Source of the text: Pageant of Ghana By: Freda Wolfson Year: 1958 Snails are valuable protein source among the forest people. In the district of Ahafo (Ghana), lies one of the richest areas for snail catching in Ghana. During the snail hunting season, whole villages –men, women and children –migrate into the forest, leaving only …
Permanent link to this article: https://fishconsult.org/?p=10372
Feb 13 2014
Global fish trade in the early 1900s
The information in this 2-slide bite has been distilled from the document of the United Nations conference which was held in Hot Springs, Virginia, USA during the period May 18 – June 3, 1943. Fish trade has been focused upon in the bite especially in related to salted fish. The prices of salted fish in …
Permanent link to this article: https://fishconsult.org/?p=10364