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
1
1
gregorian
2015
4
1
14
2
online
1
fulltext
en
Effect of dietary canola oil level on the growth performance and fatty acid composition of fingerlings of rainbow trout (Oncorhynchus mykiss)
aquaculture
aquaculture
پژوهشي
Orginal research papers
This study evaluated the suitability of canola oil as a source of supplemental dietary lipid for rainbow trout. Triplicate groups of the 30 fingerlings held under identical culture conditions were fed twice daily by iso-nitrogenous, iso-calorific and iso-lipidic diets for eight weeks. Experimental diets consisted of 30.3% protein, 18.7 kJg-1 energy and 16.7% lipid from fish oil (FO), canola oil (CO) and 1:1 blend of the two oils (FCO). Moisture, ash, protein, lipid, final body weight, condition factor, feed conversion ratio, survival and hepatosomatic indices were not affected by treatments. Specific growth rate and weight gain of fish reared on fish oil diet (FOD) and canola oil diet (COD) were significantly higher than those fed with the fish and canola oils diet (FCOD). Protein efficiency ratio was highest in fish fed with the COD. Whole body fatty acid compositions mirrored those of diet treatments. The highest amounts of HUFAs were detected in fish fed with FOD, which was significantly different from other treatments. In all treatments PUFAs/SFAs and n-6/n-3 ratios were higher than 0.45 and lower than 4, respectively. Our results indicate the fingerlings can be reared on diets in which FO has been replaced with CO, with no significant effects on fish growth performance.
Rainbow Trout, Oncorhynchus mykiss, Fish oil replacement, Fish oil, Vegetable oil, Fatty acids, Body composition
336
349
http://jifro.ir/browse.php?a_code=A-10-668-4&slc_lang=en&sid=1
A
Masiha
100319475328460013061
100319475328460013061
No
E
Ebrahimi
e_ebrahimi@cc.iut.ac.ir
100319475328460013062
100319475328460013062
Yes
N
Mahboobi Soofiani
100319475328460013063
100319475328460013063
No
M
Kadivar
100319475328460013064
100319475328460013064
No