Technical characteristics and economic performance of commercial tilapia hatcheries applying different management systems in Egypt

Nasr-Allah, A.M.; Dickson, Malcolm; Al-Kenawy, D.A.; Ahmed, Mahfuzuddin; El-Naggar, G.

doi:10.1016/j.aquaculture.2014.02.004

Cited by 25 publications

(30 citation statements)

References 6 publications

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“…The price was taken from local farmers (US$2.22/dozen oysters) from which the minimum commercial SL of oyster is established at ≥10 cm. Production characteristics and costs (variable and fixed) were used to estimate the financial performance of each production system (Nasr- Allah et al, 2014). It is important to notice that this preliminary analysis was performed with data generated exclusively from the data set originally analyzed in this cultivation cycle (3,500 organisms/ploidy/site), but according to local farmer experience, it is needed to consider an initial stock of 250,000 oysters to start a commercial production.…”

Section: Discussionmentioning

confidence: 99%

Growth and economic performance of diploid and triploid Pacific oysters Crassostrea gigas cultivated in three lagoons of the Gulf of California

Villanueva-Fonseca

Góngora-Gómez

Domínguez-Orozco

et al. 2017

lajar

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ABSTRACT. Diploid and triploid Crassostrea gigas oysters were cultivated at three farms (Guasave, Navolato and Ahome) in Sinaloa, Mexico, to evaluate their growth and economic performances. Growth rate and survival of oysters were compared in long-line cultivation and were mostly affected by water parameters rather than ploidy or their interaction. The highest growth rates for shell length (8.01 mm month ) were obtained for the Ahome/triploid group. Survival differed significantly from 98.6% for the Guasave/triploids to 76.7% for the Ahome/diploids. After the first production cycle, more than 80% of production costs represent the purchase of cultivation equipment and salaries contributed with around 9%. The Guasave farm produced the highest profits (US$8,053.71 diploids, US$8,182.19 triploids). Use of diploids starting the production cycle on October-November to avoid mortality and improve final profit is recommended.

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Section: Discussionmentioning

confidence: 99%

Growth and economic performance of diploid and triploid Pacific oysters Crassostrea gigas cultivated in three lagoons of the Gulf of California

Villanueva-Fonseca

Góngora-Gómez

Domínguez-Orozco

et al. 2017

lajar

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“…It is a diagnostic tool that helps firms to eliminate activities that are costly and substitutable, or maintain less costly ones in order to bring goods to consumers at the least possible cost [31]. Fisheries' value chain analysis involves all the activities required to bring products (whole fish, fillets, fish steaks, fish nuggets, and processed fish) to the final consumers, passing through the different phases of production, processing, and delivery [32][33][34][35][36][37]. In the case of the tuna market, it can be defined as a market-focused collaboration among different stakeholders, including wholesalers, retailers, processing plants, and exporters, who participate in marketing value-added products [32].…”

Section: Theoretical Frameworkmentioning

confidence: 99%

Balancing interests of actors in the ocean tuna value chain of Khanh Hoa province, Vietnam

Nguyen

Jolly

2018

Marine Policy

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The exploitation of ocean tuna has become one of the most important fisheries, in terms of foreign income generation, in Khanh Hoa province. This paper examines the structure, conduct, and performance (SCP) of the tuna value chain within a value chain governance framework to answer the research questions: (a) what is the nature of the tuna value chain in Khanh Hoa province, (b) who are the actors involved in the ocean tuna value chain? (c) What type of market structure is in place and what is its effect on product flow and market performance. Results show that actors operate in an imperfectly competitive market and earn profits from their operation, but the intermediaries receive the most in comparison to their investment expenditure. Processing companies benefit more when they buy directly from the fishermen and they face many difficulties in exporting ocean tuna.

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“…This was mainly due to the market sale price of GIANT improved fry, which is about 20% higher than the commercial strains when sold at the same sizes. Nasr‐Allah, Dickson, Kenawy, Fathi, and El‐Naggar () in studying the technical and economic characteristics of different Egyptian Nile tilapia hatchery systems, found that production costs and revenues varied with changes in management systems.…”

Section: Discussionmentioning

confidence: 99%

Assessment of the impact of dissemination of genetically improved Abbassa Nile tilapia strain (GIANT‐G9) versus commercial strains in some Egyptian governorates

2019

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WorldFish initiated a selective breeding program in Abbassa-Egypt to develop and produce the genetically improved Nile tilapia strain known as "Genetically Improved Abbassa Nile tilapia (GIANT)", adopting the same technology used for the Genetically Improved Farmed Tilapia (GIFT), in Asia. WorldFish provided the Ninth Generation (G9) broodstock of the GIANT to 11 Broodstock Multiplication Centers (BMC's) in five governorates; these centres then disseminated improved mixed-sex fry to 160 tilapia hatcheries which supplied all-male fry to 1,500 fish farms in 2017. We present results of an impact assessment of the G9 of GIANT in 83 of these fish farms in four Egyptian governorates (Kafr El-Sheikh, Fayoum, Behera and Alexandria). Results indicate that the use of GIANT in all governorates achieved significantly higher (18.8%) fish yields (12.3%-26.4%) and 15.7% lower FCR (feed conversion ratio), reflecting a positive impact on their net profits compared with those who used commercial strains. Overall, fish farmers who stocked GIANT had significantly higher average fish sales (5,567 US$/ha) than those who stocked non-improved commercial strains (5,192 US$/ha) in all governorates. However, when comparing within governorates, the difference was significant only in Fayoum and Alexandria noting a mixed performance of the GIANT strain. The mixed performance indicates that some hatcheries may have crossed the different strains, which lowered the performance differences.To get an objective analysis of the performance of the GIANT, it is recommended that similar assessment be undertaken with new generations of the strain supported by on-farm performance trials.

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Technical characteristics and economic performance of commercial tilapia hatcheries applying different management systems in Egypt

Cited by 25 publications

References 6 publications

Growth and economic performance of diploid and triploid Pacific oysters Crassostrea gigas cultivated in three lagoons of the Gulf of California

Growth and economic performance of diploid and triploid Pacific oysters Crassostrea gigas cultivated in three lagoons of the Gulf of California

Balancing interests of actors in the ocean tuna value chain of Khanh Hoa province, Vietnam

Assessment of the impact of dissemination of genetically improved Abbassa Nile tilapia strain (GIANT‐G9) versus commercial strains in some Egyptian governorates

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