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IJFS 2015, 14 Back to browse issues page
Effects of stock density on texture-colour quality and chemical composition of rainbow trout (Oncorhynchus mykiss)
F Çagiltay * , N Erkan , Ş Ulusoy , A Selcuk , Ö Özden
, ferfez@istanbul.edu.tr
Abstract:   (3389 Views)
This study describes the effects of different stocking densities on texture/colour characteristics, protein content /amino acid and lipid content/fatty acid composition of rainbow trout fillet. Stocking density was selected 5 (Group A), 15 (Group B), 25 (Group C) kg fish m−3. Tukey’s Multiple Comparison Test showed insignificant differences between measured size/weight measurement and condition factors. No significant differences were found between A and C groups for colour analysis (L* and a* value) and texture profile analysis (hardness, adhesiveness, cohesiveness and gumminess values) of rainbow trout fillets. The proximate composition analysis showed rainbow trout fillets from the A and C groups to exhibit higher values of moisture than the B group. Fish from the A and B groups had a lower of ash and protein in comparison to C group samples. The highest fat values of rainbow trout were measured in B group samples. The content essential amino acid and non-essential amino acid was lower in A and B groups than in C groups. Fish from the C group had higher content of polyunsaturated fatty acids, especially n-3, docosahexanoic acid (DHA) and eicosapentaenoic acid (EPA) in comparison to A and C group. As a result, 25 kg fish m−3 is recommended stock density in terms of product texture/color and composition quality.
Keywords: Rainbow trout, Oncorhynchus mykiss, Stock density, Texture-Colour quality, Chemical composition
Full-Text [PDF 582 kb]   (1205 Downloads)    
Type of Study: Orginal research papers | Subject: aquaculture
Received: 2013/01/15 | Accepted: 2015/06/16 | Published: 2015/08/22
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Çagiltay F, Erkan N, Ulusoy Ş, Selcuk A, Özden Ö. Effects of stock density on texture-colour quality and chemical composition of rainbow trout (Oncorhynchus mykiss). IJFS. 2015; 14 (3) :687-698
URL: http://jifro.ir/article-1-834-en.html


Volume 14, Issue 3 (7-2015) Back to browse issues page
مجله علوم شیلاتی ایران Iranian Journal of Fisheries Sciences
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