Nov 14 2013

Fishing traps “gargoor” and ghost fishing – Video

The video shows three fish traps on a fishing boat in Omani waters.

Review on fish trapping in general: Abdel Rahman El Gamal

GargoorFish trapping which is popular traditional fishing gear has been found effective in catching fresh fish compared to other methods. The trap seen in the video which is named “gargoor” in the gulf region is a hemispherical steel mesh fish trap with a revolving trap door attached to a coned gate which leads the fish towards the bait. A buoy (float) is included.

If the fishing traps got discarded, lost, or abandoned, the trap fishing turns into what is known by “Ghost fish” which describes the situation when the lost or abandoned trap continues to entrap fishes ending by fish killing causing negative impacts on the environment, navigation and fishery resources.

Various measures have been recommended and/or adopted to mitigate ghost fishing whether at country, regional or international levels. These include limiting the number of traps per each fishing vessel and initiating programs and foundations related to ghost fishing. The use of biodegradable grid in each trap is among the recommended measures to tackle the ghost fishing phenomenon.

 

Permanent link to this article: https://fishconsult.org/?p=9887

Nov 13 2013

Cleaning the beaches of Lake Amatitlan (Guatemala) (in English/Spanish)

Credit: Manuel Cano Alfaro (Guatemala)

The photos show the Personnel Division of the Lake Cleaning, Environmental Education and Interagency Relations work together on Coastal Cleanup work.

Se fotos mostrar la Personal de la División de Limpieza del Lago Amatitlan, Educación Ambiental y Relaciones Interinstitucionales trabajan conjuntamente en trabajos de Limpieza de Playas.

Cleaning Lake Amatitlan beaches (Guatemala) 01 Cleaning Lake Amatitlan beaches (Guatemala) 02

 

 

Permanent link to this article: https://fishconsult.org/?p=9880

Nov 12 2013

Small-scale aquaculture project in the Democratic Republic of Congo (in French)

This project has been developed by a group of trainees who participated during 2012 in the Warm Water Fish Production training course which is hosted by the Egyptian International Centre for Agriculture (EICA) in partnership with Japan International Cooperation Agency (JICA). The proposed location of this project is Kaziba village, Sud-Kivu district, Democratic Republic of Congo. The project components include the rationality of the project as well as the chosen species (Nile tilapia, Oreochromis niloticus), and other technical and economic components. The document includes a supporting diagram for the project layout. This project which is a part of the training program is supervised by Dr. Abdel Rahman El Gamal.

http://fishconsult.org/wp-content/uploads/2013/11/Small-scale-aquaculture-project-in-the-Democratic-Republic-of-Congo-in-French.pdf

Permanent link to this article: https://fishconsult.org/?p=9876

Nov 12 2013

Production of briquette from water hyacinth in Guatemala

Credit: Manuel Cano Alfaro (Guatemala)

This photo shows the utilization of water hyacinth (Eichornia crassipes) as a briquette. The caloric merit of the produced briquette (5048 cal/g) has been found high enough to justify its replacing to firewood. In order to produce this briquette, water hyacinth is milled and compacted under pressure.

Briquette from water hyacinth in Guatemala (01) Briquette from water hyacinth in Guatemala (02)

 

 

Permanent link to this article: https://fishconsult.org/?p=9867

Nov 12 2013

A word of thanks from the participants in the Warm Water Fish Production training course (2012)

EICA JICA 2012This is an example of a word of thanks addressed to myself from the friends who participated in Warm Water Fish Production training course during 2012. This annual training course is being organized by the Egyptian International Centre for Agriculture (EICA) in partnership with Japan International Cooperation Agency (JICA). This course has hosted 15 participants from 11 countries. The names and countries of friends who provided this word of thanks are: Burundi (Alain Murekambanze and Jean-Marie Manirambona), Cameroon (Elie Badai and Jean Blaise Ngollong Njangi), Congo Kinshasa (Maisha Katintima), Gabon (Charles Ibinga Maganga), Ghana (Grace Charway), Malawi ( Gaves Mulaleya), Rwanda (Emmanuel Hahirwabasenga and Rwigiriza Augustin Kanimba), South Sudan (Juma Frezar), Sudan (Amal Abdlla and Lutfy Idris), Tanzania (Mussa Kayanda) and Uganda (Charles Yiga).

 

 

Permanent link to this article: https://fishconsult.org/?p=9862

Nov 10 2013

Live fish handling (Updated 2013 version)

This lecture was delivered in “Fish Culture Development” training course during October 2013. This 10-week international training course is annually hosted by the Egyptian International Centre for Agriculture (EICA).

The lecture addresses key handling issues related to aquaculture practices including:

Stocking (thermal acclimation, pH acclimation, salinity acclimation, osmosis, doubtful shipments, enumeration)

Sampling (sampling frequency, sampling methods and gears, sampling size)

Harvesting (selective harvesting, harvest methods, draining, stress and fish quality)

Grading (hand grading, automated grading, importance of grading, types of graders)

Marking (reasons of marking, group marking, individual marking, branding, body cavity tags)

Anesthesia (levels of anesthesia, anesthetics, doses, induction of anesthesia, MS222, withdrawal period)

Hatchery operations (broodstock acquisition, electrofishing, trapping, egg stripping, ringer solution, micropyle, fertilizing solution, incubation, influencing factors, fry nursing)

Transportation (physical parameters, water quality, Bohr effect, tank transport, insulation, plastic bags, safe transport, loading rates, reducing water temperature, added substances during fish transport)

http://fishconsult.org/wp-content/uploads/2013/11/Live_Fish_Handling_Updated_2013_version.pdf

Permanent link to this article: https://fishconsult.org/?p=9818

Nov 10 2013

Artisanal fishery in Gambia: Post fishing practices

Credit: Peter K Mendy (Gambia)

The photos show usual practices done after the fishing trip by artisanal fishermen. Usually, after loading their catch of fish, fishermen draw out their fishing boats out of the water to the shore. Also, fishermen inspect and look for damages which could have occurred to their nets. In such case, they sit on the shore and repair their nets themselves or pay others who have the experience in net repair to do that for them.

 Gambia (pulling fishing boats out of water) Gambia (repair of fishing nets)

 

 

Permanent link to this article: https://fishconsult.org/?p=9811

Nov 10 2013

Use of water hyacinth, Eichornia crassipes as a bio-fence in Lake Amatitlan, Guatemala

Credit: Manuel Cano Alfaro (Guatemala)

The three photos show the formation of floating bio-fence (biobardas) in Lake Amatitlan (Guatemala) using water hyacinth, Eichornia crassipes to retain floating solid wastes entering the Lake from the Villalobos River.

Water hyacinth in Guatemala (01) Water hyacinth in Guatemala (02) Water hyacinth in Guatemala (03)

 

 

Permanent link to this article: https://fishconsult.org/?p=9803

Nov 08 2013

Small-scale aquaculture in rural development (updated 2013 version)

This lecture was delivered in “Fish Culture Development” training course during November 2013. This 10-week international training course is annually hosted by the Egyptian International Centre for Agriculture (EICA).

The lecture started with the features of rural community in general before moving to the rationality of incorporating aquaculture in rural development programs focusing on social issues such as nutrition, employment and empowering the role of women in this activity. Criteria of small-scale projects from several countries are presented. The lecture addressed several types of small-scale aquaculture including rice-fish, fish-duck, fish-chicken and rabbit-fish systems. A significant part of the lecture addressed the promotion of small-scale projects. This part included selection of beneficiaries, adoption curve, training, subsidies in several countries, role of extension and challenges as well as concerns related to these projects.

http://fishconsult.org/wp-content/uploads/2013/11/Small-scale-aquaculture-in-Rural-Development-Updated-2013-version.pdf

Permanent link to this article: https://fishconsult.org/?p=9798

Nov 08 2013

Applications of genetics in aquaculture and fishery practices (Updated 2013 version)

This lecture was delivered in “Fish Culture Development” training course during October 2013. This 10-week international training course is annually hosted by the Egyptian International Centre for Agriculture (EICA).

While the lecture started with an introductory component on genetics, the focus has been placed on breeding programs. The following sub-titles are addressed in the lecture:

Introductory part (qualitative genetics, quantitative genetics, genetic variance)

Selection (concept, mass selection – tandem selection, selection index, selection response, heritability, sexual dimorphism, selection plateau, genetic-environment interaction)

Hybridization (hybrid vigor, intraspecific, interspecific, intergeneric)

Broodstock management (effective breeding number, inbreeding, Ne, sex ratio)

Ploidy induction (triploidy, tetraploidy)

Advanced genetic applications (gynogensis, androgensis, genetic engineering, genetically modified organisms, GMOs)

The lecture is supported by diagrams, tables, and pictures

http://fishconsult.org/wp-content/uploads/2013/11/Application-of-Genetics-2013.pdf

Permanent link to this article: https://fishconsult.org/?p=9783

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