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Abstract

Aquaculture ecosystem assessment is a major key for successful aquaculture Planning. There are many aquaculture farms constructed in Egypt, but because of the non-sufficient studies about the environmental conditions of aquaculture ecosystem assessment, many projects achieved negative results and had low economical returns. The present study was conducted to evaluate the aquaculture ecosystem assessment of irrigation water of El-Mahmoudia Canal, Alexandria, Egypt. The result indicated that temperature (24.65±0.4°C), DO (5.38±0.20mg/l), COD (14.40±4.5mg/l) and BOD (2.86±0.20 mg/l) were in the optimum range for O. niloticus. Chlorophyll a, b and carotenoids were 10.449±0.953, 4.685±0.704 and 2.374±0.054 μg/g, respectively. The biochemical composition of plankton showed that protein, lipid and carbohydrate were 37.7±3.39 %, 16.33±0.85%, and 11.23±2.63%, respectively. Moreover, SFA, MUFA and PUFA were 70.29±4.07%, 11.172±0.132 %, and 18.55±0.525 % of total fatty acids, respectively. Zooplankton community showed that rotifers and copepods configured the main bulk of zooplankton community (95.9% to the total zooplankton community). These conditions are considered the ideal recommended conditions for cultivation of Oreochromis niloticus that started with 100,000 fingerlings (distributed as 4.76 fish/m 3 of earth pond) for six months with 82% survival rate with final yield of 21.3 ton/1.6 hectare.

Impact of Seaweed Liquid Extract Biostimulant on Growth, Yield, and Chemical Composition of Cucumber (Cucumis sativus)

“…Marine aquatic organisms are an important source of bioactive compounds [57,58]. In the current study, concerning the GC-MS analysis [13,59,60], the NIST (National Institute of Standards and Technology) mass spectral library identified nine compounds in TAM ® (Figure 1).…”

Potential Applications of Native Cyanobacterium Isolate (Arthrospira platensis NIOF17/003) for Biodiesel Production and Utilization of Its Byproduct in Marine Rotifer (Brachionus plicatilis) Production

“…The aquatic organisms are a sustainable source of PUFA, MUFA, SFAs, palmitic acid, and fatty acid methyl esters [74,75]. Among all aquatic organisms, microalgal cells are the most sustainable, attractive, and promising source [1][2][3][17][18][19][20]69,72,73].…”

Effect of Pterocladia capillacea Seaweed Extracts on Growth Parameters and Biochemical Constituents of Jew’s Mallow

“…Marine algae are considered very important bioindicator for the marine ecosystem [13][14][15]. Many studies have reported that the constituents, diversity, and communities of marine algae are affected by variations in environmental parameters and nutrient limitation [65][66][67][68][69][70]. During the last few years, the attention on scientific and commercial interest to biotechnological applications of algae as a sustainable source and global commercial for aquaculture [71][72][73][74][75], biofuel [12,76], extracts [77,78], food supplement, pharmaceuticals, and cosmetics were increased [12].…”

“…However, our data is in the same line of the results presented by Khairy and El-Shafay [13] who found that, during spring season of 2010, the highest component is carbohydrate (50.49%), followed by protein (23.72%) and lipid (2.71%). Many authors reported that the biochemical constituents of marine algae are affected by variations in environmental conditions and nutrient availability [65][66][67][68][69][70].…”