Authors: Yan, HW; Liu, Q; Cui, X; Shen, XF; Hu, PF; Liu, WL; Ge, YW; Zhang, L; Liu, LL; Song, CB; Liu, Y

AQUACULTURE RESEARCH

Volume: 50 Issue: 8 Pages: 2066-2080 Published: AUG 2019 Language: English

Document type: Article

DOI: 10.1111/are.14073

Abstract:

We assessed the effects of light intensity and spectrum on the growth, development and survival of

Dicentrarchus labrax larvae from 30 to 96 days after hatching. Twelve lighting regimes were applied

using 0.3, 1 and 2 W/m(2) full spectrum white, blue, red and green light. By day 66 of exposure, growth

performance was significantly better in larvae reared under green or red light compared with white or

blue light (p < 0.05), while it was significantly better at 2.0 W/m(2) compared with 1.0 or 0.3 W/m(2)

(p < 0.05). Larvae reared under white or blue light had significantly more deformities (p < 0.05) than

did larvae reared under light of other spectra, while larvae reared under 0.3 W/m(2) light intensity had

a significantly higher proportion of jaw malformations than reared under 1.0 and 2.0 W/m(2) (p < 0.05).

Dicentrarchus labrax larvae subjected to green light showed significantly lower survival compared with

the other light spectra (p < 0.05). Moreover, light significantly affected brain aanat1a, aanatt1b,

mellc, mt1, mt2, gh, tsh and crf mRNA expression. Therefore, the red and green light groups (or under

2.0 W/m(2)) could improve the growth performance and enhance secretion of melatonin, gh and tsh, and

reduce the proportion of jaw malformations.

Full Text: https://onlinelibrary.wiley.com/doi/10.1111/are.14073