Sep 23 2017

Artificial reefs in Bahrain

Photos’s credit: Reef Ball Foundation (http://www.reefball.org)

Review: Abdel Rahman El Gamal (Founder of the website)

 

 

 

The reef balls shown in the inserted represent a sample of the artificial reef program in Baharin which started in 1982 in which artificial reefs are strategically distributed around Bahrain to create new habitats for fish.

The photos show a new version on artificial reefs which are commonly called “reef balls” which are made of concrete with different sizes. In this particular part of the project, the reef balls have been placed in locations that were not supporting fish life before. The subsequent monitoring as reported, the marine life has been flourishing near the reef balls which were dropped in water 2002.

 

 

Permanent link to this article: https://fishconsult.org/?p=14123

Sep 20 2017

Pond culture of tilapia in Boyaca, Colombia

Photos credit: Karen Sachica Cepeda (Colombia)

Review: Abdel Rahman El Gamal (Founder of the website)

 

 

The inserted pictures show the tilapia feeding in an earthen pond located in Boyaca, Colombia.

Tilapias are cultured using different methods such as cages, intensive culture and mainly earthen ponds such as the ponds shown in the picture. There are several feed mills in Colombia where artificial feed with different protein levels are produced.

Earthen ponds may be fertilized using either organic manure (livestock, chicken or pig) or common chemical fertilizers.

Tilapia in Colombia represents an important species whose culture technology was developed elsewhere before its introduction into Colombia. Tilapia aquaculture contributes significantly to Colombian aquaculture. According to FAO statistics, farmed tilapia produced 57,000, 58,500 and 61,065 tons in 2013, 2014 and 2015 respectively.

 

 

Permanent link to this article: https://fishconsult.org/?p=14118

Sep 19 2017

Co-management of shared fishery resources between Chad and Cameroon

Photos credit: Aliadoumadji Rimadoum (Chad)

Review: Aliadoumadji Rimadoum and Abdel Rahman El Gamal (Founder of the website)

The inserted pictures are taken in a temporary protection zone located in Bermoussa whereas the co-management of fishery resource in this zone enables rational management of fishery resources as well as leads to enhances the productivity of the water body. Added to that, the co-management approach promotes healthy ecosystem and in the same time helps to avoid conflicts over the resource.

 

 

Permanent link to this article: https://fishconsult.org/?p=14115

Sep 19 2017

Marine shrimp marking using eye-tagging (Video)

Video credit: David Kawahigashi (Thailand – Vannamei101)

Review: Abdel Rahman El Gamal (Founder of the website)

 

The video shows the eye-tagging of broodstock specimens of whiteleg shrimp (Litopenaeus vannamei).  This type of marking was found tolerable by shrimp especially large adult shrimp and is not lost during molting.

Eye tags are commonly used to mark adult marine shrimp in captive broodstock populations in hatcheries and/or in genetic breeding grams. The tag is made of plastic or metal and is numbered for identifying individual shrimp. The tag ring is placed on the eye stalk behind the bulbous of the eye.

https://youtu.be/pdIFmTuoUGY

Permanent link to this article: https://fishconsult.org/?p=14110

Sep 18 2017

Counting of fish fry using a simple apparatus in China (Video)

Video credit: Herman Hennig (Argentine)

Review: Abdel Rahman El Gamal (Founder of the video channel)

 

 

 

The video shows a simple counting system for fish fry. As shown in the video, the human resource controls the whole operation through the actual counting fish fry and then releases it from above to reach the bottom container. As shown, the fry are always moving from up to the container below in enough water in order to reduce handling stress ending be healthy fry before stocking. Once the target number is reached, the receiving container is replaced and so on.

 

 

 

 

 

https://youtu.be/N3ZVwPsUGCc

Permanent link to this article: https://fishconsult.org/?p=14101

Sep 18 2017

Tilapia farming in Cabo Delgado (Mozambique) – Video

Video credit: Gabriel de Labra (Spain)

Review: Abdel Rahman El Gamal (Egypt)

 

 

This 8-min video covers a growing season for tilapia as carried out in Cabo Delgado (Mozambique). This operation is a part of a project jointly operated by Mozambique Government and funded by the Red Cross (Spain). The object focuses on rural development through small-scale aquaculture.

The video starts with the preparation of the pilot pond followed by receiving tilapia fry which has been produced and transported from a tilapia hatchery located about 1800 kilometers from the farm.

The typical pond management has been covered in the video including initial stocking in hapas, feeding and regular sampling reaching to partial harvesting of tilapia. The feed preparation has been addressed in more details showing the on-farm feed preparation using local materials and simple equipment such as meat grinder. The potential fish farmers are the ones who carry out most of the activities under the technical advice of the project consultant. Also, the video shows the reproduction of tilapia which occurred three months after stocking.

https://youtu.be/CvOzYb9cqnA

Permanent link to this article: https://fishconsult.org/?p=14098

Sep 01 2017

Climate change in Chile – in Spanish

A permission from the report owners has been granted to publish the report on this website

cover-climate-change-in-chile

http://fishconsult.org/wp-content/uploads/2016/12/Climate-change-in-Chile.pdf

Permanent link to this article: https://fishconsult.org/?p=13736

Aug 18 2017

Country report- Peru (2015)- in Spanish

A permission from the report owner has been granted to publish the report on this website

country-report-peru-2015

http://fishconsult.org/wp-content/uploads/2016/12/Country-report-Peru-2015.pdf

Permanent link to this article: https://fishconsult.org/?p=13765

Aug 17 2017

Organic shrimp farming in Asia (Video)

Video credit: Jimmy Lim (Aquamimicry China)

Review: Jimmy Lim and Abdel Rahman El Gamal (Founder of the channel)

The video was filmed in a shrimp farm located in Hainan (China). The video shows the preparation of the ponds before stocking of the post larvae. There is a growing interest in organic food including organic shrimp. The driving forces behind the promotion of organic shrimp are mainly food safety and farm economics especially such farms rely on natural food in feeding.

Before stocking the shrimp post larvae, the management of shrimp grow-out farm targets the development of sufficient copepods bloom using a specific type of Probiotics as well as tea seed cake and rice bran. The use of tea seed cake targets the elimination of small unwanted fish if exist without the need to apply chemical disinfectants. It is believed that rice bran whether grinded or fermented rice bran would enhance more copepod development. The probiotic is applied based on the pH of the water.

According to published protocols, the water is pumped into shrimp ponds through 300-micron mesh for filtration. The aerators shown in the video operate for 7 to 10 days before the stocking of shrimp post larvae. The high aeration during the start-up is required to enhance the copepod bloom. The density of live food is checked to ensure a sufficient density before the stocking of shrimp post larvae.

This particular farm consists of four ponds of 2.5 mu each (one mu = 1666 m2) with a depth of 80 cm. The farm receives oceanic water from South China Sea. The water pH was 8 at noon.

Usually the PL15 of whiteleg shrimp, Litopenaeus vannamei are stocked at density which could range from 30-100 pcs/m2 depending on the intensity level.

https://youtu.be/Snb91b1TJOw

Permanent link to this article: https://fishconsult.org/?p=14084

Aug 15 2017

Grass carp in Brazil (Video)

Video credit: Herman Hennig (Argentina)
Review: Abdel Rahman El Gamal (Founder of the video channel)

According to published reports, grass carp (Ctenopharyngodon idellus) was first introduced into Brazil by the government in 1968 from Hungary. Afterward, the species was introduced in 1979 along with other Chinese carps by CEPTA/IBAMA (Research and Training Center in Aquaculture), State of Sao Paulo.

Carp polyculture in Brazil has been promoted as a complementary rural activity for small-scale family farmers in southern Brazil whereas farmers’ associations such as Braspeixe organizes a fish festival during which different carp dishes are offered to the public. In such small-scale farms, on-farm and/or commercial inputs to fertilize and feed carp in polyculture systems.

Some farms stock grass carp along with other species in recreation fishing centers which attract interested people.

The contribution of grass carp to Brazilian aquaculture seems not that significant especially when all species of carps, barbels, and other cyprinids are grouped in the FAO statistics whereas their combined production amounted 20,693 tons in 2015 compared to the total aquaculture production which amounted 575,260 tons in the same year. However, grass carp –along with other exotic species- represent to researchers an experimental fish species for a variety of research projects including spawning induction and genetic analysis.

https://youtu.be/GiZNu5Fbs4I

Permanent link to this article: https://fishconsult.org/?p=14079

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