The aim of this study was to investigate the effect of different carotenoid sources on goldfish (Carassius auratus) skin pigmentation. The value of goldfish depends on the intensity of the skin color. In the red variety of goldfish, an orange-red hue is desirable. Juvenile goldfish were fed one of five diets for five months to determine the effects of carotenoids on skin pigmentation, growth, feed efficiency, and survival: (1) astaxanthin (carophyll pink at 75 mg/kg), (2) canthaxanthin (carophyll red at 75 mg/kg), (3) Gammarus spp. (75 mg/kg), (4) Oleoresin paprika (180 mg/kg), and (5) an unsupplemented control. Growth and feed efficiency did not significantly differ among groups. Initial and final samples of head skin were measured by colorimetric analysis for lightness (L*), redness (a*), yellowness (b*), hue (Hº ab), and chroma (C ab *). The best red color (a* and Hº ab) was obtained with the astaxanthin, canthaxanthin, and paprika diets.
Bu çalışmada, yeşil alglerden Ulva intestinalis türünün ekolojik özellikleri ile besin kompozisyonundaki değişimin belirlenmesi amaçlanmıştır. Çalışma materyali Sinop kıyıları boyunca seçilen dört farklı noktadan mevsimsel olarak toplanmıştır. Yapılan analizler sonunda mevsimler ve istasyonlar arasında istatistiksel olarak önemli farklılıklar (P
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.