Incorporation of soybean meal and hazelnut meal in diets for Black Sea turbot (Scophthaimus maeoticus)

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ERGÜN S., YİĞİT M., Turker A., Harmantepe B.

ISRAELI JOURNAL OF AQUACULTURE-BAMIDGEH, vol.60, no.1, pp.27-36, 2008 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 60 Issue: 1
  • Publication Date: 2008
  • Journal Name: ISRAELI JOURNAL OF AQUACULTURE-BAMIDGEH
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.27-36
  • Keywords: Black Sea turbot, hazelnut meal, fishmeal, soybean meal, feed utilization, EVALUATING PROTEIN-QUALITY, TROUT ONCORHYNCHUS-MYKISS, PRACTICAL FISH CULTURE, LESS-POLLUTING DIETS, BY-PRODUCT MEAL, RAINBOW-TROUT, TOTAL REPLACEMENT, NUTRIENT UTILIZATION, PSETTA-MAXIMA, GROWTH
  • Çanakkale Onsekiz Mart University Affiliated: Yes

Abstract

The effects of soybean and hazelnut meals as partial replacements of fishmeal were studied in

Black Sea turbot (Scophthalmus maeoticus). Juvenile fish (mean 26 g) were fed six isoenergetic

(19.1±0.18 kJ/g diet) and isonitrogenous (511±0.48 g protein/kg diet) diets for 60 days. The control

diet contained fishmeal as the sole protein source. In two of the six experimental diets, soybean

meal replaced 20% and 35% of the fishmeal. The other three diets contained 65% fishmeal

plus soybean and hazelnut meal at ratios of 25/10, 15/20, 5/30. There was no significant difference

(p<0.05) in growth performance between the groups fed the diet containing 20% soybean

meal and those fed the control diet. Fish fed the 10% or 20% hazelnut meal diets had similar

results as fish fed the diet containing 35% soybean meal. Growth performance, feed utilization,

protein efficiency, and nitrogen retention were significantly lower in the group fed the 30% hazelnut

diet. Total nitrogen excretion and retention were similar in all groups except the 30% hazelnut

group. Results indicate that soybean meal can replace up to 20% of the fishmeal without

causing reduction in growth performance, nutrient utilization, or nitrogen retention and that hazelnut

meal can be incorporated with 20%, but not 35%, soybean meal at a level of no more than

20% of the diet.

The effects of soybean and hazelnut meals as partial replacements of fishmeal were studied in Black Sea turbot (Scophthalmus maeoticus). Juvenile fish (mean 26 g) were fed six isoenergetic (19.1 +/- 0.18 kJ/g diet) and isonitrogenous (511 +/- 0.48 g protein/kg diet) diets for 60 days. The control diet contained fishmeal as the sole protein source. In two of the six experimental diets, soybean meal replaced 20% and 35% of the fishmeal. The other three diets contained 65% fishmeal plus soybean and hazelnut meal at ratios of 25/10, 15/20, 5/30. There was no significant difference (p<0.05) in growth performance between the groups fed the diet containing 20% soybean meal and those fed the control diet. Fish fed the 10% or 20% hazelnut meal diets had similar results as fish fed the diet containing 35% soybean meal. Growth performance, feed utilization, protein efficiency, and nitrogen retention were significantly lower in the group fed the 30% hazelnut diet. Total nitrogen excretion and retention were similar in all groups except the 30% hazelnut group. Results indicate that soybean meal can replace up to 20% of the fishmeal without causing reduction in growth performance, nutrient utilization, or nitrogen retention and that hazelnut meal can be incorporated with 20%, but not 35%, soybean meal at a level of no more than 20% of the diet.