Work

Effects of Different LED Lights on the Growth Performance and Serum Lysozyme Activity of Common Carp Cyprinus carpio and Bacterial Communities in a Closed Recirculating System

Year: 2026

Type: article

Abstract: We evaluated the effect of our light-emitting diode (LED) light treatments (blue, peak at 468 nm; green, peak at 537 nm; red, peak at 630 nm; and white light) on the growth performance and serum lysozyme activity of the common carp Cyprinus carpio and bacterial communities in a closed recirculating system under an average power intensity of 1.29 ± 0.18 mW/cm2 of LED light on the water surface of a circulating rearing system for 70 days. The specific growth rate, weight gain and K-factor were improved when carp were cultured under green or blue light. The specific lysozyme activity in the plasma of the common carp was significantly promoted under blue light compared to the green, white and red light conditions after 70 days. Compared to the other types of LED lights, the blue light treatment resulted in the lowest number of heterotrophic bacteria in the rearing water and the highest heterotrophic bacteria in the carp’s gut contents (both p < 0.05). The phyla Fusobacteria, Bacteroidetes, Tenericutes, Proteobacteria and Firmicutes were abundant in the carp’s gut contents after culturing with any of the four types of LED light. In short, the blue LED light can be considered a potential tool in sustainable aquaculture.

Source: Fishes

DOI: 10.3390/fishes11040234

Authors: Phan Trong Binh, Satoshi Hori, Nguyen Thi Dang, Katsuhisa Uchida, Yousuke Taoka

Institutions: University of Miyazaki, Research Institute for Aquaculture No1

Language: English

Topic: Aquaculture disease management and microbiota

Subfield: Immunology

Field: Immunology and Microbiology

Domain: Life Sciences

SDGs: Clean water and sanitation, Life below water

Open Access status: gold

Estimated APC paid: $3,137