IngentaConnect Effects of dietary soybean oil concentration on growth, nutrient ...

Authors: Martínez-Llorens, Silvia¹; Vidal, Ana Tomás¹; Moñino, Andrés Vicente¹; Torres, Marcial Pla¹; Cerdá, Miguel Jover¹

Source: Aquaculture Research, Volume 38, Number 1, January 2007 , pp. 76-81(6)

Publisher: Blackwell Publishing

Abstract:

A 309 days feeding experiment was carried out on gilthead sea bream fingerlings (initial weight 14.7±4.4 g) to evaluate effects of substitution of fish oil with soybean oil in diets on growth and sensory characteristics and muscle fatty acid composition. Duplicate groups of fish were hand fed with four isoenergetic and isonitrogenous diets (46% protein, 14% lipid and 22 MJ kg⁻¹) in which 0%, 24%, 48% or 72% of the fish oil was replaced by soybean oil. Fish fed diet 72% reached a lower final weight (324 g) than fish fed diets 0%, 24% and 48% (349, 343 and 338 g respectively). Feed intake, protein efficiency ratio, body composition and economic profitability were not influenced by the amount of soybean oil in the diets, but muscle fatty acid composition differed with diets. Panellists observed significant sensory differences between fish fed diet 0% and diet 72%. These results verified the possibility of feeding sea bream until they reached commercial weight with a 48% dietary substitution of fish oil for soybean oil.

Keywords: sparids; fish nutrition; lipid sources; feed formulation; body composition; flesh quality; economic analysis

Document Type: Research article

DOI: 10.1111/j.1365-2109.2006.01636.x

Affiliations: 1: Aquatic Resources Research Group, Department of Animal Science, Polytechnic University of Valencia, Valencia, Spain

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Effects of dietary soybean oil concentration on growth, nutrient utilization and muscle fatty acid composition of gilthead sea bream (Sparus aurata L.)