التقييم الاقتصادي للمزارع السمكية البحرية في منطقة المثلث بمحافظة دمياط.

The research aimed at the economic evaluation of marine aquaculture in the Triangle area in Damietta Governorate. The data was collected using a personal interview questionnaire during the months of September and October of the year 2020. This is for a regular random sample of 57 holders of marine fish farms in Damietta Governorate, representing about 5% of the total holders of marine fish farms. The descriptive and quantitative statistical analysis method has been used to estimate some averages, percentages and economic indicators that serve the research objectives. The research reached several results, the most important of which are: (1) The relative contribution of natural fisheries in Egypt and Damietta Governorate declined, as their contribution reached 22.74% and 15.14%, respectively. While the role of fish farming has been steadily growing, its contribution amounted to 77.26% and 84.86% of the total fish production in Egypt and Damietta Governorate, which amounted to 1599.69 thousand tons, 150.36 thousand tons as an average for the period (2010-2019), respectively. (2) The average value of the variable and fixed costs per acre in marine farms amounted to 208.70 thousand pounds, 23.70 thousand pounds, representing 89.80%, 10.20%, respectively, of the total costs, which amounted to 232.40 thousand pounds/feddan. (3) The average selling price of a ton of sea bream and sea bass was 100 thousand pounds, 70 thousand pounds for mullet, and the average production per acre of marine fish was 2.889 tons, while the total revenue from sold marine fish was 283.23 thousand pounds/feddan. (4) Marine aquaculture projects generate profit and an economic return. (5) The feasibility of investing in marine aquaculture activity was shown, as the average internal rate of return was estimated at 37%. (6) Investment efficiency indicators are more sensitive to changes in the farm selling price of marine fish than changes in the purchase price of feed and fingerlings, but the profitability of these projects remains economically feasible. (7) The critical value of the average selling price of bream and sea bass was estimated at 88.50 thousand pounds / ton, and mullet 61.95 thousand pounds / ton, while the critical value for the price of a ton of fodder was 25.40 thousand pounds, while the critical value of the mortality rate was 30%. (8) The problems of marine fish farming facing the respondents were of high relative importance and were represented in administrative and organizational problems, technical and operational problems, and economic and marketing problems. (9) The most important proposals of the respondents to overcome the problems of marine fish farming that they face are to provide and support the prices of feed, seed, and production requirements from the Authority - Establishing fish sales and marketing outlets near the areas of marine fish farms - Constantly cleansing the septic tanks and public drains and increasing the number of openings and septic tanks in the Triangle area and the road. Port Said International to constantly replenish the water - Establishing a fish hatchery that serves the marine fish farms area in Damietta to provide fry continuously and in a timely manner - Increasing the rental period for marine fish farms while working on ownership of lands for owners of marine fish farms. [ABSTRACT FROM AUTHOR]