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Aquaculture

Considerations about dissemination of improved fish strains

Aquaculture production systems in developing countries are largely based on the use of unimproved species and strains. As knowledge and experience are accumulated in relation to the management, feeding and animal health issues of such production systems, the availability of genetically more productive stock becomes imperative in order to more effectively use resources.

Developing capacity in Myanmar’s fisheries

Myanmar lies between Bangladesh and Thailand on the Bay of Bengal and is the largest country in Southeast Asia. The tropical nation has an impressive coastline that forms a quarter of its total perimeter, stretching almost 2000 kilometers along the Bay of Bengal and Andaman Sea.

Improving food security and livelihoods in Myanmar

A $2 million project to improve rural food security and livelihoods in Myanmar through the development of fisheries and small-scale aquaculture was officially launched last week by WorldFish and the Myanmar government Department of Fisheries.

Nile tilapia ‘super strains’ to help Philippines

A project to identify Nile tilapia ‘super strains’ in the Philippines will help to increase the living standards of poor fish farmers and consumers, create new employment opportunities and provide food security across the nation.

Iceboxes help women fish retailers find profits

A group of women fish retailers in the Egyptian region of Shakshouk near Fayoum are realizing better profits from the sale after of their fish due to the acquisition of iceboxes.  Iceboxes help them keep their fish fresh in the market, allowing them to sell more stock each day.

Increased productivity in Ghana from fast-growing Nile Tilapia

WorldFish, Malaysia (30 November 2012)
 
An improved breed of Nile Tilapia that grows 30% faster than non-improved strains is helping to increase aquaculture productivity and food security in Ghana.
 

Improved breeding of Nile Tilapia leads to productivity gains

WorldFish, Malaysia (30 November 2012)
 
Two improved strains of Nile Tilapia that grow 30% faster and heavier than non-improved strains are helping to increase aquaculture productivity and food security in West Africa and Egypt.
 

Genetic improvement of Israeli blue (Jordan) tilapia, Oreochromis aureus (Steindachner), through selective breeding for harvest weight

Genetic improvement of Israeli blue (Jordan) tilapia, Oreochromis aureus (Steindachner), through selective breeding for harvest weight
Zak, T. ; Deshev, R. ; Benet-Perlberg, A. ; Naor, A. ; Magen, I. ; Shapira, Y. ; Ponzoni, R.W. ; Hulata, G. Aquaculture Research 9 Nov 2012

Genetic parameters and selection responses were obtained for harvest body weight of blue tilapia (Oreochromis aureus) from data collected over three generations in a selected population. A total of 18 194 records representing 186 sires and 201 dams were used in the analysis. Within generation heritability estimates for harvest body weight ranged from 0.18 to 0.58. When data from more than one generation were included in the analysis, heritability estimates became more stable (0.33–0.40) and it was 0.33 when all data were included in the analysis. The common full-sib effect accounted for 10% of the phenotypic variance in the full data set. Heritability for survival from stocking to harvest was estimated at 0.01 and 0.09 in actual units (fitting an animal model) and in the logit (sire model) scale respectively. The genetic correlation between harvest body weight and survival was 0.22 and not significantly different from zero. The total selection response for harvest body weight over the three generations of selection measured as the difference between least-squares means of selected and control lines was 17.7%. The corresponding figure when response was measured as the difference between mean breeding values of selected and control lines was 19.6%. The average inbreeding coefficient was 0.003 after three generations of selection. These results indicate that there are good prospects for the genetic improvement of harvest body weight in blue tilapia.

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