Can canthaxanthin intensify the colour of the blood swordtail Xiphophorus helleri?
J Fish Biol
; 103(1): 13-21, 2023 Jul.
Article
em En
| MEDLINE
| ID: mdl-37060354
ABSTRACT
Colouring has a great influence on the commercialization of ornamental fish. The aim of this study was to evaluate different concentrations of canthaxanthin in the diet of the blood swordtail Xiphophorus helleri in an effort to obtain a more intense red colour. Six concentrations of canthaxanthin (0, 50, 100, 250, 400 and 600 mg kg-1 diet) were used. The experiment lasted 60 days. Fish were evaluated for increased red pigmentation through the use of photographs (performed by smartphone) and imaging applications considering the Hunter method and the CMYK and productive performance. No significant differences were observed for productive performance. The use of photographs by means of a smartphone and the use of imaging applications proved to be adequate to assess differences in colour in the species. Swordtail red pigmentation did not show significant increase regardless of canthaxanthin dosages. Varieties of ornamental fish bred for red coloration may have limits for increased colour due to the storage capacity of carotenoids by chromatophores.
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Base de dados:
MEDLINE
Assunto principal:
Ciprinodontiformes
/
Cantaxantina
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article