Abstract—This research evaluates the effect of wavelengths of the light on growth rates of Nile tilapia fry in the order of improving sustainability in aquaculture production. For this purpose, four tanks of water with tilapias were studied. Three tanks were illuminated with LED lamps each one with monochromatic peak wavelengths (λ): Blue light (BL) tank with λ = 451.67 nm, Green light (GL) with λ = 513.33 nm and Red light (RL) tank with λ = 627.27 nm. All tanks were illuminated with a light intensity of 0.832 mW/cm², and they had a photoperiod of 18L:6D throughout the study. Besides, the fourth tank was illuminated only by Natural light (NL) tank, which had the function of witness tank. Each treatment included the fourth, were randomly assigned to 150L tanks that were stocked with 122 Nile tilapia fry. The Nile tilapia fry had an initial average weight of 0.24 ± 0.01 g, and were grown for 73 days. The average final weight for BL, GL, RL and NL treatments were 15.54 g, 16.84 g, 17.27 g and 16.22 g, respectively. The results suggest that Nile tilapia fry was positively influenced by the red light wavelength, which was represented in the greatest mass gain.

Index Terms—Aquaculture, color, LEDs, light, tilapia.

Daniela Lopez-Betancur, Carlos Olvera-Olvera, Guerrero-Mendez are with Autonomous University of Zacatecas, Academic Unit of Electrical Engineering, Zacatecas, Mexico (email: Danielalopez106@hotmail.com).
Ivan Moreno Hernandez is with Autonomous University of Zacatecas, Academic Unit of Physics, Zacatecas, Mexico.

Cite: Daniela Lopez-Betancur, Carlos Olvera-Olvera, Ivan Moreno Hernandez, Carlos Guerrero-Mendez, "Effect of the RGB Wavelengths of LED Light on Growth Rates of Nile Tilapia Fry in Biofloc Technology (BFT) Systems," International Journal of Bioscience, Biochemistry and Bioinformatics vol. 9, no. 4, pp. 231-236, 2019.