Effects of replacement of fish meal with poultry by-product meals on apparent digestibility, body composition and protein efficiency ratio in a practical diets for rainbow trout, Onchorynchus mykiss

Erturk M. M., Sevgili H.

ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES, vol.16, no.9, pp.1355-1359, 2003 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 16 Issue: 9
  • Publication Date: 2003
  • Doi Number: 10.5713/ajas.2003.1355
  • Journal Name: ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1355-1359
  • Keywords: rainbow trout, poultry by-product meal, protein efficiency ratio, apparent digestibility, body composition, ONCORHYNCHUS-MYKISS, COEFFICIENTS, INGREDIENTS, FEED
  • Akdeniz University Affiliated: Yes

Abstract

This study examined the replacement of the fish meal (FM) with commercial poultry by-product meal (PBM) in practical diets for rainbow trout (Onchorynchus mykiss, Walbaum). Five isocaloric and isonitrogenous diets containing levels 0 (control), 10, 20, 30 and 40% of PBM as a replacement for FM were fed to three replicate groups of rainbow trout with a initial weight 34.50+/-0.43 g (mean+/-SE). Protein efficiency ratio (PER) of diets containing PBM up to 20% were similar to the control while significantly lower values were obtained from the groups receiving higher levels of PBM (p<0.05). Apparent protein digestibility coefficients (ADCs) were significantly lower than that of the control group when PBM was included at level of 20% or more. Similarly, significantly lower values were observed with diets containing 30 and 40% PBM in terms of dry matter, organic matter, ether extract, ash and energy digestibility (p<0.05). Dietary treatments did not significantly affect the body composition of the fish in terms of dry matter, crude protein, ether extract and ash. In conclusion, PBM in a proportion of 20% may replace about 40 % of FM in rainbow trout diet without significant impairment grow.