Stocking density effects on survival, growth performance, feed utilization, and carcass composition of meagre, Argyrosomus regius (Asso, 1801) fingerlings reared in fiberglass tanks using underground saltwater

Four stocking densities (50, 100, 150, and 200 fish m-3) of meagre (Argyrosomus regius) fingerlings with an initial weight of 2.47 g were tested. Fish were stocked in fiberglass tanks and fed on a 47/17 protein/lipids ratio pelleted diet for 60 days. The survival rate, growth, feed utilization, and...

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Published inAquaculture, Aquarium, Conservation & Legislation Vol. 14; no. 1; pp. 495 - 505
Main Authors El-Dahhar, Alaa A E, El-Ebiary, El-Sayed H, Abdel-Rahim, Mohamed M, Refaee, Wael M A, Lotfy, Ayman M A
Format Journal Article
LanguageEnglish
Published Cluj-Napoca Bioflux SRL 01.02.2021
Subjects
Aquaculture
Argyrosomus regius
Artificial diets
Carcasses
Composition
Conversion ratio
Density
Diet
Efficiency
Energy
Experiments
Feed composition
Feed conversion
Feeds
Fiberglass
Fingerlings
Fish
Fish stocking
Fisheries
Food conversion
Growth
Lipids
Nutritive value
Performance indices
Population
Predatory behavior
Proteins
Restocking
Saline water
Salinity
Stocking
Stocking density
Survival
Tanks
Utilization
Variance analysis
Water quality
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Summary:Four stocking densities (50, 100, 150, and 200 fish m-3) of meagre (Argyrosomus regius) fingerlings with an initial weight of 2.47 g were tested. Fish were stocked in fiberglass tanks and fed on a 47/17 protein/lipids ratio pelleted diet for 60 days. The survival rate, growth, feed utilization, and carcass composition were evaluated. Results indicated that predatory behavior increased with increasing fish density leading to a decrease in meagre's survival rate. Growth performance indices decreased with increasing fish density without significant (p > 0.05) differences between density 50 and 100 fish m-3. At lower stocking density, fish exhibited lower content of moisture and higher content of protein. A significant difference in the content of protein and lipids between density 200 fish m-3 and the other densities was recorded. Also, feed utilization indices (feed conversion ratio (FCR), productive protein value (PPV), %, and protein efficiency ratio (PER)) showed better values for lower densities and significant differences between density 200 fish m-3 and the other densities. From the results mentioned above, it could be concluded that the best stocking density of meagre is 50-100 fish m-3 using a wellbalanced artificial diet.
ISSN:1844-8143
1844-9166