Effects of light source, photoperiod, and intensity on technical and economic performance of meagre, Argyrosomus regius, on intensive land-based farms

This study was performed to investigate the effects of light source, photoperiod, and intensity on the bio-economic performance of meagre (Argyrosomus regius). Juveniles (10.0 g) were exposed to an artificial light source at two photoperiod levels, 12 dark (D):12 light (L) and 8D:16L, and three ligh...

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Published inAquaculture, Aquarium, Conservation & Legislation Vol. 12; no. 5; pp. 1531 - 1545
Main Authors Abdel-Rahim, Mohamed M, Lotfy, Ayman M, Aly, Hadir A, Sallam, Ghada R, Toutou, Mohamed M
Format Journal Article
LanguageEnglish
Published Cluj-Napoca Bioflux SRL 01.10.2019
Subjects
Agricultural production
Argyrosomus regius
Conversion ratio
Design engineering
Diet
Economics
Energy utilization
Farms
Feed conversion
Fish
Food conversion
Growth rate
Juveniles
Laboratories
Light
Light intensity
Light levels
Light sources
Luminous intensity
Natural lighting
Nutrition research
Photoperiods
Physiology
Production capacity
Profitability
Researchers
Salinity
Water quality
Mediterranean Sea
Egypt
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Summary:This study was performed to investigate the effects of light source, photoperiod, and intensity on the bio-economic performance of meagre (Argyrosomus regius). Juveniles (10.0 g) were exposed to an artificial light source at two photoperiod levels, 12 dark (D):12 light (L) and 8D:16L, and three light intensity levels, 200, 400, and 600 lux. The results were compared with the results for fish exposed to a natural light source, photoperiod, and light intensity (control). The results demonstrated the superiority of natural light on fish performance, where significant improvements in specific growth rate - SGR (109.9%), feed conversion ratio - FCR (26.2%), protein productive value - PPV (97.7%), and energy utilization - EU (112.6%) were detected. Improvements in fish performance of meagre were observed under 8D: 16L, and 36.0% (SGR), 20.6% (FCR), 54.2% (PPV), and 76.9% (EU) were recorded. Increasing light intensity from 200 to 400 lux improved the overall evaluated parameters for both photoperiods; however, 600 lux showed positive results under the 12D:12L photoperiod and negative results under the 8D:16L photoperiod. The natural light source resulted in the best economic indices. It is recommended to benefit from the results of this experiment, in the engineering design and construction of intensive land-based meagre farms to achieve the best productivity and highest profitability.
ISSN:1844-8143
1844-9166