Abstract
We assessed the impact of various green light photoperiods from LED lamps on water quality, microorganism community, antioxidant capacity, lipid peroxidation, and growth performance in Pacific white shrimp Litopenaeus vannamei in a BFT system. The study was conducted indoors in 150-L tanks using shrimp with an initial weight of 0.48 g at a stocking density of 500 shrimp m−3 for 61 days. The experiment was designed with four treatments with four replicates each, with different green light photoperiods: 1) 16 h L/8 h D, 2) 12 h L/12 h D (control), 3) 8 h L/16 h D and 4) 4 h L/20 h D. No significant differences were found in water quality parameters following trial completion (p > 0.05). However, there were significant differences in the bacterial abundance of coccoids, free filamentous, attached filamentous, vibrios, and bacilli (p < 0.05) and in protozoa including flagellates, ciliates, rotifers, nematodes, and amebae (p < 0.05). There were also significant differences in lipid peroxidation, with lower lipid peroxidation in the 12 h L/12 h D, 8 h L/16 h D, and 4 h L/20 h D treatments and higher antioxidant capacity in the hepatopancreas and muscle in the 8 h L/16 h D treatment (p < 0.05). Shrimp from the 8 h L/16 h D treatment showed a higher final weight than those from the 12 h L/12 h D control treatment (p < 0.05). Thus, a photoperiod of 8 h of light and 16 h of darkness with green LED light is suggested for rearing L. vannamei in biofloc systems.
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The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
Special thanks to GUABI Animal Health and Nutrition, AQUATEC, TREVISAN and Al Aqua for donating the experimental diets and post-larvae and aeration system respectively. We dedicate this article to Dr. Paulo Abreu who passed away and was of great relevance for the elaboration of this doctoral thesis.
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The authors are grateful for the financial support provided by the National Council for Scientific and Technological Development (CNPq), Coordination for the Improvement of Higher-Level Personnel (CAPES) and Foundation for Research Support of the State of Rio Grande do Sul (FAPERGS), grant number 21/2551-0002225-6. Wasielesky, W. Jr., Krummenauer, D., and Monserrat, J.M. are research fellows of CNPq under process number PQ 310652/2017-0, PQ 313514/2023-2, and PQ 307888/2020-7 respectively.
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Wellica G. Reis: Conceptualization; Methodology; Investigation; Data curation; Formal analysis; Writing—original draft, Writing—review & editing; Visualization.
Paulo C. Abreu: Conceptualization; Writing – Review; Supervision; Funding acquisition; Resources.
Wilson Wasielesky Jr: Conceptualization; Writing – Review; Supervision; Funding acquisition; Resources.
Luis Poersch: Conceptualization; Writing – Review; Supervision; Funding acquisition; Resources.
Jose Maria Monserrat: Conceptualization; Writing – Review; Supervision; Funding acquisition; Resources.
Hellyjúnyor Brandão: Conceptualization; Methodology; Formal analysis; Writing—Review & Editing.
Dariano Krummenauer: Conceptualization; Resources; Writing—Review & Editing; Supervision; Project administration; Funding acquisition; Resources.
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Reis, W.G., Abreu, P.C., Wasielesky, W. et al. Effect of different photoperiods of artificial green LED lighting in a biofloc system on growth and oxidative stress in Litopenaeus vannamei. Aquacult Int (2024). https://doi.org/10.1007/s10499-024-01495-3
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DOI: https://doi.org/10.1007/s10499-024-01495-3