Open AccessRed Light Stimulates Feeding Motivation in Fish but Does Not Improve Growth
Author(s) -
Gilson Luiz Volpato,
Thaís S. Bovi,
Renato Hajenius Aché de Freitas,
Danielle F. da Silva,
Helton Carlos Delício,
Percília Cardoso Giaquinto,
Rodrigo Egydio Barreto
Publication year - 2013
Publication title -
plos one
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.99
H-Index - 332
ISSN - 1932-6203
DOI - 10.1371/journal.pone.0059134
Subject(s) - nile tilapia , nile red , red light , blue light , acclimatization , fish <actinopterygii> , zoology , absorbance , biology , food science , chemistry , fishery , ecology , materials science , optics , botany , chromatography , optoelectronics , physics , fluorescence , oreochromis
Nile tilapia fish were individually reared under similar light levels for 8 weeks under five colored light spectra (maximum wavelength absorbance): white (full light spectrum), blue (∼452 nm), green (∼516 nm), yellow (∼520 nm) or red (∼628 nm). The effects of light on feeding, latency to begin feeding, growth and feed conversion were measured during the last 4 weeks of the study (i.e., after acclimation). We found that red light stimulates feeding, as in humans, most likely by affecting central control centers, but the extra feeding is not converted into growth.
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