Arish University, Faculty of Environmental Agricultural SciencesSinai Journal of Applied Sciences2314-60799120200401EFFECT OF IRRIGATION LEVELS AND SOIL AMENDMENT ON GROWTH AND YIELD OF SWEET PEPPER CROP UNDER EL-ARISH REGION CONDITIONS1168636710.21608/sinjas.2020.86367ENTaghreed A.BadawiDept. Plant Prod., Fac. Environ. Agric. Sci., Arish Univ., Egypt.Mohamed S.El-KassasDept. Soil and Water, Fac. Environ. Agric. Sci., Arish Univ., Egypt.Mahmoud I.MahmoudDept. Plant Prod., Fac. Environ. Agric. Sci., Arish Univ., Egypt.Ali I.ElKasasDept. Plant Prod., Fac. Environ. Agric. Sci., Arish Univ., Egypt.Journal Article20200221Two field experiments were carried out during summer seasons of 2017 and 2018 at the Experimental Farm, Faculty of Environmental Agricultural Sciences, Arish University, Egypt to study the effect of three levels of irrigation (100, 80 and 60% of irrigation water requirement) and three types of soil amendments (without, gypsum and pressed olive cake) and their combinations on growth and yield of sweet pepper (Capsicum annuum L. cv. “Top Star”) crop under El-Arish region conditions. Plants were irrigated using drip irrigation system. The highest values of all studied traits; viz., vegetative growth, plant fresh and dry weights, yield of grad A and B and total yield were recorded with using 100 % followed by 80% irrigation level both + pressed olive cake that followed by applying 80% irrigation level + gypsum as soil amendment, respectively in both growing seasons. While the lowest values were obtained by application 60% of water requirements with or without using soil amendments.https://sinjas.journals.ekb.eg/article_86367_53b5bcec4bed227b79922f4835dd9ea4.pdfArish University, Faculty of Environmental Agricultural SciencesSinai Journal of Applied Sciences2314-60799120200401LEAVES AND FRUITS CONTENT OF N, P, AND K AS WELL AS FRUIT QUALITY OF SWEET PEPPER PLANT AS AFFECTED BY IRRIGATION LEVELS AND SOIL AMENDMENTS UNDER EL-ARISH REGION CONDITIONS17288637210.21608/sinjas.2020.86372ENTaghreed A.BadawiDept. Plant Prod., Fac. Environ. Agric. Sci., Arish Univ., Egypt.Mohamed S.El-KassasDept. Soil and Water, Fac. Environ. Agric. Sci., Arish Univ., Egypt.Mahmoud I.MahmoudDept. Plant Prod., Fac. Environ. Agric. Sci., Arish Univ., Egypt.Ali I.ElKasasDept. Plant Prod., Fac. Environ. Agric. Sci., Arish Univ., Egypt.Journal Article20200221This study was carried out during summer season of 2017 and 2018 at the Experimental Farm, Faculty of Environmental Agricultural Sciences, Arish University, Egypt to investigate the effects of water irrigation levels and soil amendments on content of N, P and K in leaves and fruits as well as fruit quality of sweet pepper plant. Sweet pepper cv. “Top star” was subjected to three irrigation levels (100,80 and 60% of irrigation requirements) and three soil amendments; <em>i.e.,</em> control (without amendment), gypsum and pressed olive cake and their interactions in a factorial experiment using the randomized complete block design with three replications. Drip irrigation system was used and soil texture was sandy loam. The obtained results indicated that the highest contents of N, P and Kin leaves and fruit were recorded with applying 100% irrigation level + pressed olive cake as soil amendment followed by 80% irrigation levels + pressed olive cake in both seasons. All fruit quality studied traits; <em>viz</em>., fruit length, fruit diameter, fruit wall thickness, hardness, TSS%, and vitamin C content had their highest values with applying 100% of irrigation water + pressed olive cake as a soil amendment in both seasons, except length/diameter (L/D) ratio and pH values, where the highest values of fruit L/D ratio were recorded with applying 80% of irrigation water level + pressed olive cake in both seasons, while the highest values of fruit pH were recorded with applying 80% of irrigation water + pressed olive cake without significant difference than the same treatment of soil amendment with 100% or 60% irrigation water level in both seasons.https://sinjas.journals.ekb.eg/article_86372_0776fd00b731baa8fb2af0944dd7504b.pdfArish University, Faculty of Environmental Agricultural SciencesSinai Journal of Applied Sciences2314-60799120200401EFFECT OF CHEMICAL NITROGEN FERTILIZER LEVEL AND HUMIC ACID RATE ON Gladiolus grandiflorus PRODUCTIVITY29408637610.21608/sinjas.2020.86376ENHadeer R.M.El-KotDept. Plant Prod., Fac. Environ. Agric. Sci., Arish Univ., Egypt.Sonia A.AbdallahDept. Plant Prod., Fac. Environ. Agric. Sci., Arish Univ., Egypt.Hany M.S.HassanDept. Plant Prod., Fac. Environ. Agric. Sci., Arish Univ., Egypt.Mohamed A.M.AliDept. Plant Prod., Fac. Environ. Agric. Sci., Arish Univ., Egypt.Journal Article20200105A field experiment was conducted at the Experimental Farm, Faculty of Environmental Agricultural Science, Arish University, Egypt, during two successive seasons 2017-2018 and 2018-2019 to study the effect of various levels of nitrogen fertilizer (0, 100, 200 and 300 kg fed<sup>-1</sup>) in combination with different rates of humic acid (0,150, 250 and 350 ppm) as a foliar spray on plant growth, flowering characteristics, corms and cormels characteristics and chemical constituents. The obtained results cleared that using 200 kg fed<sup>-1</sup> nitrogen in urea forms with 350 mg l<sup>-1</sup> humic acid as a foliar spray gave the maximum value in each of vegetative growth parameters, flowering characteristics, diameter of corms, weight of cormel, and chemical constituents (N,P and K) content in leaves. However, a non-significant variation was observed in the treatment 200 kg fed<sup>-1</sup> nitrogen with the three concentrations of humic acid for weight of corms and No. of cormels in plants in most cases. While, plants grown without nitrogen and humic acid (control) gave the minimum values in all parameters.https://sinjas.journals.ekb.eg/article_86376_ec67fc00bbbbb101ca3cbe2472095e5d.pdfArish University, Faculty of Environmental Agricultural SciencesSinai Journal of Applied Sciences2314-60799120200401EFFECT OF SOME SOIL CONDITIONERS ON PHYSICAL AND CHEMICAL PROPERTIES OF NORTH SINAI SANDY SOILS41568638810.21608/sinjas.2020.86388ENZeinab Z.M.El-MaslamanyDept. Soil and Water, Fac. Environ. Agric. Sci., Arish Univ., Egypt.Mohamed S.El-KassasDept. Soil and Water, Fac. Environ. Agric. Sci., Arish Univ., Egypt.Attia A.ElSebsyDept. Soil and Water, Fac. Environ. Agric. Sci., Arish Univ., Egypt.Journal Article20191231A pot experiment was carried out during the early winter of 2016-2017 at the Experimental Farm of Faculty of Environmental Agricultural Sciences, Arish University, to evaluate the use of some soil conditioners on physical and chemical properties of Arish sandy soil, Wheat (<em>Triticum aestivum </em>L.,CV Sakha 94) plants were grown in pots, A surface sandy soil sample (0-15cm) from the Experimental Farm of the Faculty was used in the study. Each conditioner was homogenously distributed on the soil surface and then were mixed with the upper 15 cm of soil surface. Grains of wheat were sown in each pot containing 20 Kg soil. NPK fertilizers were added as recommended. Vinasse, humic acid and polyacrylamide were added at three rates (0.5,1.0 and1.5(W/W)). The experimental design was complete randomized with four replicates for each treatment. Results of pH showed that the effect of applied both vinasse and humic acid to the soil in different rates led to slightly decrease on pH values gradually by increasing the rate of application. The result of acrylamide polymer show that the effect of the application to the soil led to increase pH values gradually by increasing the rate of application. Results of EC in soil show that the effect of applied vinasse, humic acid and acrylamide polymer to the soil in different rates led to increase on EC values gradually by increasing the rate of application. Also, data showed an increase in available N, P and K at all application, the higher value of N observed on application of vinasse on rates of V<sub>2</sub> at the initial soil sampling periods, V<sub>3</sub> at the mid-season and harvesting soil sampling periods. The higher value of P observed on application of vinasse on rates V<sub>3</sub> at the initial soil sampling periods and HA<sub>3</sub> at the mid-season and harvesting soil sampling periods and the higher value of K observed with application of V<sub>3</sub> at all experiment periods. Except vinasse treatments, the mean values of organic matter, significantly increased with increasing the rates of the application the higher value HA<sub>3</sub>. Also, data indicate that for all studied levels of vinasse significantly increase soil organic matter values comparing to control treatments, HA<sub>3</sub> achieve the highest increasing values of OM while application of PAM<sub>3</sub> treatment was the superior for increasing soil OM. All studied levels of vinasse significantly increased soil bulk density. Apparently, HA<sub>2</sub> and HA<sub>3</sub> achieved the highest reducing values of BD. Such decreases represent about 8.05% and 7.89% lower than control treatment for the previously mentioned two HA rates and PAM<sub>3</sub> treatment was the superior to other PAM<sub>3</sub> for reducing soil BD, such decrease was 0.13 Mg m<sup>-3</sup>at the development stage of soil sampling and represent about 8.87% lower than control treatment. Results also revealed that there was a pronounced decreasing in soil K<sub>s</sub> at the Initial period of soil sampling. Soil moisture content in both field capacity and witting point were increase along most of the studied soil sampling stages. The highest N, P and K content in grains was found for addition V<sub>3</sub>. Also, the highest grains yield was found for addition (vinasse)V<sub>3</sub> while the control treatment had the lowest values.https://sinjas.journals.ekb.eg/article_86388_f8178282fc0917a7d09cca0327f2b4b8.pdfArish University, Faculty of Environmental Agricultural SciencesSinai Journal of Applied Sciences2314-60799120200401AGE AND GROWTH OF GILTHEAD SEA BREAM (SPARUS AURATA) FROM BARDAWIL LAGOON, NORTH SINAI, EGYPT57628641710.21608/sinjas.2020.86417ENSamah A.MokbelDept. Fish Res. and Aquacul., Fac. Environ Agric. Sci., Arish Univ., Egypt.Nesreen K.IbrahimDept. Marine Sci., Fac. Sci., Suez Canal Univ., Egypt.Mohamed S.AhmedFac. Aquacul. and Marine Fisheries, Arish Univ., Egypt.Gaber D.IbrahimDept. Fish Res. and Aquacul., Fac. Environ Agric. Sci., Arish Univ., Egypt.0000-0003-0199-6711Journal Article20200216Atotal of 688 gilthead bream <em>Sparus aurata</em> was collected from Bardawil lagoon fishery during 2017 season. Total length ranged from 10.2 to 31.0 cm while total weight ranged from 13 to 442.5 g. The length-weight relationship parameters were a = 0.0132and b = 3.0224. Age was determined using otolith radius reading technique and the longevity of this species was found to be 5 years. and the parameters of the von Bertalanffy growth model were K = 0.338 year<sup>-1</sup>, L<sub>∞</sub> = 32.16, t<sub>0</sub>= -1.324 cm and W<sub>∞</sub> = 523.8g. Growth performance index φ′ was estimated as 2.5. The mortality estimates were 0.792year<sup>-1</sup>for total mortality (Z), 0.153year<sup>-1</sup>for natural mortality (M) and 0.554 year<sup>-1</sup> for fishing mortality (F). The exploitation rate (E = 0.803) indicates that the stock of sea bream in the Bardwell lagoon is heavily exploited. The catch of <em>Sparus aurata</em> in Bardawil lagoon composed mainly of small sized individuals where up to 54.1% of this species lie in age group 0.https://sinjas.journals.ekb.eg/article_86417_93f5e415f6c8ef8c30ce62c5d9366d98.pdfArish University, Faculty of Environmental Agricultural SciencesSinai Journal of Applied Sciences2314-60799120200401EFFECT OF DIETARY SUPPLEMENTATION (PREBIOTIC MIXTURES AND PROTEASE ENZYME COMBINATION) ON GROWTH PERFORMANCE AND FEED UTILIZATION OF RED TILAPIA Oreochromis sp. FED WITH DIETS FREE FISHMEAL63768642610.21608/sinjas.2020.86426ENGhadeer A.DokdokDept. Fish Res. and Aquacul., Fac. Environ. Agric. Sci., Arish Univ., Egypt.Heba E.Abd ElnabiDept. Fish Res. and Aquacul., Fac. Environ. Agric. Sci., Arish Univ., Egypt.Magdy A.SoltanDept. Animal Prod., Fac. Agric., Banha Univ., Egypt.Gaber D.IbrahimDept. Fish Res. and Aquacul., Fac. Environ. Agric. Sci., Arish Univ., Egypt.0000-0003-0199-6711Journal Article20200303The present study was carried out at Mariculture Research Center, Arish University, North Sinai, Egypt. This study aimed to examine the effects of total replacement of fish meal by a combination of prebiotic mixtures and protease enzyme on growth performance and feed utilization parameters of red tilapia. A total of 150 fish were equally distributed in 15 glass aquaria. Ten fingerlings per aquarium were stocked with an average initial weight 7.40±0.05g and an average initial length 7.30±0.24cm. The fish were acclimatized for two weeks at experimental condition. This study was conducted as four treatments with three replicates. The fish were fed a diet containing 30.14±0.08% crude protein and isocaloric 443.11±0.5Kcal/kg twice a day at a rate of 3% of total body weight for 84 days. At the end of experiment body weight, length and whole body composition were calculated to determine growth parameters and feed utilization. There were significant difference <em>P≤0.05</em> for all results between treatments. The results of growth parameters indicated that T4 was recorded the highest values of most growth parameters. But T3 recorded the highest condition factor. FCR and PER were not significantly differences between all treatments. The highest feed and protein intake were recorded for control group and T4. The highest dry matter and ether extract of whole body composition were recorded for T3. But the best protein value, gross energy, protein and energy retained were recorded for T4. There were no significantly differences <em>P>0.05</em> at fat and ash retained.https://sinjas.journals.ekb.eg/article_86426_5636d8ae9b5eea2a3e28811fbcb581d7.pdfArish University, Faculty of Environmental Agricultural SciencesSinai Journal of Applied Sciences2314-60799120200401AN ECONOMIC STUDY OF THE IRANIAN-GULF FOREIGN TRADE AND ITS IMPACT ON THE SAUDI ECONOMY77888643210.21608/sinjas.2020.86432ENHemat M.E.MahdyDept. Econ. and Political Sci., Inst. Asian Studies and Res., Zagazig Univ., Egypt.Taher M.HassaneinDept. Agric. Econ., Fac. Agric., Zagazig Univ., Egypt.Journal Article20191105Achieving Gulf national security has become a major importance for the countries of the Gulf Cooperation Council, especially after the growing challenges they face in this regard, and with the expectation of the emergence of other new challenges with the decrease in the volume of trade exchange between the countries of the Gulf Cooperation Council and Iran, as the volume of trade exchange between Iran and the Arab countries in particular has been affected With the Arab Gulf states with the end of the Arab Gulf War and the emergence of the idea of isolating Iran from commercial exchange with neighboring countries, especially the Arab Gulf states, even though the value of the surplus in the trade balance in Iran amounted to about $32 billion annually, While the surplus in the trade balance in the countries of the Gulf Cooperation Council reached about $422 billion annually, the value of Iranian exports amounted to about $72 billion, while the value of exports in the Gulf Cooperation Council countries amounted to about $811.2 billion annually, and the value of Iranian imports amounted to about $40 billion and the value of imports in the Gulf Cooperation Council countries reached about $279 billion annually in 2016, and compared to the volume of trade in Saudi Arabia, which has many natural resources that contribute to the development of its foreign trade movement and that contribute to building many commercial and economic relations with all the countries of the Gulf Cooperation Council, where the value of the Saudi trade volume reached about 13.8 billion Saudi riyals, while the balance of trade reached about 7.6 billion Saudi riyals in 2016, and the study is concerned with the Iranian-Gulf trade exchange and its impact on the Saudi economy despite the strengthening of trade, economic and political relations with Iran.https://sinjas.journals.ekb.eg/article_86432_c0119ed30713a290d6ccea53b59c695f.pdfArish University, Faculty of Environmental Agricultural SciencesSinai Journal of Applied Sciences2314-60799120200401INDICATORS AND DETERMINANTS OF FOREIGN TRADE BETWEEN SAUDI ARABIA AND IRAN891048643410.21608/sinjas.2020.86434ENHemat M.E.MahdyDept. Econ. and Political Sci., Inst. Asian Studies and Res., Zagazig Univ., Egypt.Taher M.HassaneinDept. Agric. Econ., Fac. Agric., Zagazig Univ., Egypt.Journal Article20191105The Iranian-Gulf relations during the era of Khatami (1997-2005) witnessed a rapprochement towards the normalization of these relations in various fields, starting with the economic fields with political significance, then the political fields, and this development was reflected in the relations in a group of Gulf interactions that began to take the form of natural relations between The Gulf and Iranian sides, which did not exist in the past, and the nature of the rapprochement was taken in relation to it from the highest levels and various visits, and the issue of oil formed a clear impact on the rapprochement process, so that these relations culminated in the security agreement between the two poles of the Gulf in 2001, the Arab-Saudi Arabia and Iran to mark the beginning of a new and distinguished stage in the Arab-Gulf-Iranian relations in general, and the Saudi-Iranian relations in particular. Iran was seeking rapprochement with Saudi Arabia to consolidate its position and influence in the region to break the stalemate that characterized its foreign policy after the revolution, and Saudi Arabia sees Iran as a key partner in the Gulf region to maintain its security in the event of settling the differences between Iran and the countries of the Gulf Cooperation Council, and, in contrast, factors The difference (dissonance) that tops the Iran-UAE dispute over the Emirati islands occupied by Iran and the sectarian difference, it was not an obstacle to rapprochement, although some disputes were raised by some Gulf countries, especially the United Arab Emirates, over the progress of the rapprochement process. Regarding the situation in Iraq after its occupation, and the developments of the Iranian nuclear program, have led to fluctuations in the Gulf-Iranian relations, although the dominant feature of those relations was the march towards rapprochement, evaluating the Iranian-Gulf rapprochement process at present is not easy in light of the successive variables surrounding the political scene in the region and the increasing international influences , and preferably not stop at attempts to improve traditional relations according to, Rather, they should initiate the deepening and development of ways of rapprochement to include all areas of political, economic, social and cultural, despite the existence of some difficulties, and Iran must realize that achieving full rapprochement with the Gulf states depends on solving the outstanding problems, and that this rapprochement should be a means to achieve this goal, And that it is not at the expense of any Gulf country, and it is expected that the future scenario of the Gulf-Iranian relations will be based on continuous consultation between the two parties on common issues while institutionalizing these interactions by establishing joint committees that meet periodically, expanding the field of security cooperation, such as drug control, terrorism, and organized crime, and setting up special arrangements in the field of military cooperation regarding ensuring freedom of navigation in the Gulf and maintaining security and stability in it. In and around the region, it portends a great deal that could threaten the entire region, especially regarding the Iranian nuclear program.https://sinjas.journals.ekb.eg/article_86434_3531b35d97d589acdc57c5f2069ed32f.pdfArish University, Faculty of Environmental Agricultural SciencesSinai Journal of Applied Sciences2314-60799120200401AN ECONOMIC STUDY OF THE FISH PRODUCTION SYSTEM IN EGYPT1051168643010.21608/sinjas.2020.86430ENAshraf M.M.AliAgric. Quarantine, Min. Agric. and Land Recl., Egypt.Mohamed A.ElSayedDept. Econ. and Rural Develop., Fac. Environ. Agric. Sci., Arish Univ., Egypt.0000-0003-3738-2535Reyad I.RadwanDept. Econ. and Rural Develop., Fac. Environ. Agric. Sci., Arish Univ., Egypt.0000-0002-0784-9205Ragab M.HefnyDept. Econ. and Rural Develop., Fac. Environ. Agric. Sci., Arish Univ., Egypt.0000-0002-1280-8512Journal Article20200109Egypt has large areas of water fisheries, in addition to many lakes of different characteristics, and the presence of the Nile River, but these sources are not exploited sufficiently. Despite the increase in the amount of fish production in Egypt from about 1.45 million tons in 2013 to about 1.82% million tons in 2017, with an increase of 25.0%, the price of fish has increased from about L.E. 13.5/kg in 2013 to about L.E. 24/kg in 2017, Which indicates that the quantities produced of fish do not meet the increasing consumer needs, and the research aims to identify the current status of fish production and ingredients. The basic characteristics of this activity in Egypt through studying the current status of fish production and value and studying the current state of development of fish production according to fisheries, fish groups and the basic ingredients (production requirements) of fish production activity in Egypt. The total fish production amounted to a minimum of about 724.3 thousand tons in 2000, while its maximum amount reached about 1822.8 thousand tons in 2017 and the average price per ton has reached its limit The minimum is about L.E. 7.7 thousand, while the maximum amount reached about L.E. 24 thousand As for the evolution of the amount of fish production in Egypt according to fisheries, fish production in marine waters during the period (2000-2017) reached a minimum of 102.9 thousand tons, while its maximum reached 136.2 thousand tons, while fish production from lakes has reached a minimum of about 144 thousand tons, while its maximum reached about 195.4 thousand tons, and the minimum amount of freshwater fish production reached about 66.1 thousand tons, while its maximum reached about 120.9 thousand tons. As for the evolution of production from fish farming reached a minimum of about 340.1 thousand tons in the year 2000, while its maximum amount reached about 1451.8 thousand tons. As for the development of fish production according to fish groups during the period (2000-2017), it was found that fish production from bony fish has reached a minimum of about 668.6 thousand tons, while its maximum reached about 1772.9 thousand tons, while fish production from cartilaginous fish has the minimum reached about 0.6 thousand tons, while the maximum reached about 3.6 thousand tons, while the fish production from crustaceans has reached a minimum of about 11.8 thousand tons, while the maximum amount reached about 25.8 thousand tons. As for With regard to fish production from mollusks, the minimum reached about 1.9 thousand tons, while the maximum amount reached about 4.8 thousand tons and it was found that fish production of other varieties has reached a minimum of about 14.1 thousand tons, while its maximum amount reached about 35 thousand tons. Regarding the basic constituents (production requirements) within the fish production activity during the period (2000-2017), the number of motorized fishing boats reached the lowest value of them about 3.8 thousand boats, while its maximum limit reached about 5.1 thousand boats. As for the number of non-motorized fishing boats, the lowest value reached about 24.2 thousand boats, while the maximum limit reached about 42.2 thousand boats. And it also turned out that the minimum number of fishers reached about 22.3 thousand fishermen, while it reached its limit maximum is about 60.4 thousand fishermen in 2000. As for the number of local societies working in fishing activity, it was found that the minimum reached about 80 associations, while the maximum number reached about 89 associations. While the minimum level for fuel and oils reached about L.E. 9.2 million in one year, while the maximum amount reached about L.E. 89.5 million.https://sinjas.journals.ekb.eg/article_86430_95d44c9ef8edcf9f9cb0a222a7556db1.pdfArish University, Faculty of Environmental Agricultural SciencesSinai Journal of Applied Sciences2314-60799120200401AN ECONOMIC STUDY OF THE FISHING SECTOR IN NORTH SINAI1171308643110.21608/sinjas.2020.86431ENAshraf M.M.AliAgric. Quarantine, Min. Agric. and Land Recl., Egypt.Mohamed A.ElSayedDept. Econ. and Rural Develop., Fac. Environ. Agric. Sci., Arish Univ., Egypt.0000-0003-3738-2535Reyad I.RadwanDept. Econ. and Rural Dev., Fac. Environ. Agric. Sci., Arish Univ., Egypt.0000-0002-0784-9205Ragab M.HefnyDept. Econ. and Rural Dev., Fac. Environ. Agric. Sci., Arish Univ., Egypt.0000-0002-1280-8512Journal Article20200109North Sinai is considered one of the most important marine fisheries governorates due to the multiple fish sources, both the Mediterranean coast, which covers an area of about 3.2 million fad. and Bardwell Lagoon, which covers an area of about 160 thousand fad. North Sinai Governorate has witnessed a decrease in the quantity of caught fish from about 5121 tons in 2013, to about 4416 tons in 2017, which resulted in high prices of fish, especially the mullet family from about L.E. 20/kg in 2013, to about L.E. 45/kg in 2017. The research aims to identify the current status of fishing activity within the different fishing gears in North Sinai, whether by studying the relative importance of the quantities of caught fish, according to the class, or review all the economic variables of the various fishing gears related to the nature of the activity. The research was based on the method of descriptive and quantitative analysis of the variables under measurement. The study relied on the secondary data published by the General Authority for Fish Resources Development and the CAPM. The preliminary data were obtained through a random stratified sample of 123 boats, 41 of which were inside El-Arish seaport and the rest were from Bardwell Lagoon boats. The results indicated that the average quantity of caught fish in El-Arish seaport during the period (2000-2017). It reached about 2083 tons, of which sardines contribute about 72.3%, and the quantity of caught fish by a statistically significant amount of about 104.5 tons, an annual decrease of about 5%. of the fish, the results indicated that the overall average amount of caught fish was about 3859 tones, of which the fish of the mullet family contributed about 25.7% during the same period. The results showed that the mullet, sea bass and <span style="text-decoration: underline;">grouper</span>/<span style="text-decoration: underline;">sea weed</span> fish were increasing annually by a statistically significant amount of about 24.7, 3.1 and 1 ton, with an annual growth rate of 2.5%, 6.1% and 5.8% respectively. The results indicated that the volume of investments in fishing activity amounted to about L.E. 175.4 million (equivalent to about L.E. 131 thousand/boat), Bardwell Lagoon contributed to by about 78.2% and the amount of caught fish about 24.1, 4 tons (equivalent to about 3080 kg/boat), Bardwell Lagoon contributed by about 73.8%. The value of caught fish for fishing boats amounted to about L.E. 134.1 million (equivalent to about L.E. 100.1 thousand/boat), Bardweel Lagoon contributed by about 83.2% and the total fishing costs reached about L.E. 105.4 million (equivalent to about L.E. 78.7 thousand/boat), Bardwell Lagoon contributed by about 74%. Total net revenues were about L.E. 44 million (L.E. 32.9 thousand/boat). The total added value of Fishing activity in North Sinai is about L.E. 86.4 million (about L.E. 64.5 thousand/boat), Bardwell Lagoon contributed by about 72.8%. Finally, the investment efficiency of the Debba boats, the Bawasa boats inside Bardwell Lagoon, the small boats, and the large boats inside the seaport of El-Arish reached about 0.246, 0.242, 0.299 and 0.17. The fishing efficiency was about 97.1%, 92.6%, 94.3% and 89.3%. In general, the Bardwell boats outperformed their counterparts in El-Arish seaport, and the small boats outperformed their large counterparts in El-Arish seaport. The research recommends increasing the number of small boats inside the seaport, in return for not allowing large boats to operate inside the sea port in El-Arish.https://sinjas.journals.ekb.eg/article_86431_0de711f085ed84b3665b591064ce297e.pdf