Iranian Journal of Fisheries Sciences
مجله علوم شیلاتی ایران
IJFS
Agriculture
http://jifro.ir
1
admin
1562-2916
10.18869/acadpub.ijfs
en
jalali
1394
4
1
gregorian
2015
7
1
14
3
online
1
fulltext
en
Effects of stock density on texture-colour quality and chemical composition of rainbow trout (Oncorhynchus mykiss)
aquaculture
aquaculture
پژوهشي
Orginal research papers
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.
Rainbow trout, Oncorhynchus mykiss, Stock density, Texture-Colour quality, Chemical composition
687
698
http://jifro.ir/browse.php?a_code=A-10-515-2&slc_lang=en&sid=1
F
Çagiltay
ferfez@istanbul.edu.tr
100319475328460013601
100319475328460013601
Yes
N
Erkan
100319475328460013602
100319475328460013602
No
Ş
Ulusoy
100319475328460013603
100319475328460013603
No
A
Selcuk
100319475328460013604
100319475328460013604
No
Ö
Özden
100319475328460013605
100319475328460013605
No