Effect of Red Pepper (Capsicum annuum) on Pigmentation of Blue Streak Hap (Labidochromis caeruleus)


YILMAZ S. , ERGÜN S.

ISRAELI JOURNAL OF AQUACULTURE-BAMIDGEH, vol.63, 2011 (Journal Indexed in SCI) identifier

  • Publication Type: Article / Article
  • Volume: 63
  • Publication Date: 2011
  • Title of Journal : ISRAELI JOURNAL OF AQUACULTURE-BAMIDGEH
  • Keywords: blue streak hap, Labidochromis caeruleus, ornamental fish, red pepper meal, pigmentation, growth, TROUT ONCORHYNCHUS-MYKISS, NATURAL CAROTENOID SOURCE, CARASSIUS-AURATUS, GOLDFISH, GROWTH, ASTAXANTHIN, COLORATION, DEPOSITION, SPIRULINA, DIETS

Abstract

The orange-red hue of the skin of blue streak hap (Labidochromis caeruleus) is one of the desirable and necessary traits sought by aquarists and commercial producers. In this study, the effect of two concentrations (20 g/kg and 50 g/kg) of red pepper (Capsicum annuum) meal on the skin coloration of juvenile blue streak hap was examined. In a 45-day feeding trial, nine plastic 20-l baskets were each stocked with 10 fish (1.07 +/- 0.02 g), fed at 3% of their body weight. Skin color was measured in the center of the body. At the end of the trial, skin redness (a*), yellowness (b*), and chroma (C*) were greater, while skin luminosity (L*) and hue (H degrees(ab)) were less in fish fed the diets containing red pepper than in fish fed the control diet without red pepper (p<0.05). Results show that red pepper meal can be used as an alternative natural carotenoid source in blue streak hap diets and that 50 g/kg is an appropriate dietary level to ensure good pigmentation, suitable growth, and feed utilization in blue streak hap.