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1447479 
Journal Article 
The Effects of Dietary Turnip (Brassica rapa) and Biofuel Algae on Growth and Chemical Composition in Rainbow Trout (Oncorhynchus mykiss) Juveniles 
Haliloglu, HI; Arslan, M; Lee, BJoo; Dabrowski, K 
2012 
1 
Turkish Journal of Fisheries and Aquatic Sciences
ISSN: 1303-2712 
12 
2 
323-329 
WOS:000309697800018 
The present study was conducted to investigate the
supplemental effects of the turnip (Brassica rapa) and its extracts and algae powder on growth
performance and body composition of rainbow trout juveniles (0.67 +/- 0.01 g). For this purpose,
7 casein-gelatin based semi purified diets were formulated to be isonitrogenous and isocaloric to
contain turnip meal, its extracts (with water and methanol) and the powder of after extraction as
well as algae powder. The diets were supplemented with 15% wheat flour (diet 1, control), 15%
turnip meal of Turkish origin (diet 2), water extract from U.S. turnip (diet 3), methanol extract
from Turkish turnip (diet 4), powder of Turkish turnip after extraction (diet 5), 15% turnip meal
of U.S. origin (diet 6) and 15% biofuel algae powder (diet 7). After 4 week feeding trial, the
fish fed diet 7 had significantly lower growth than those fed the other 6 experimental diets
(P<0.05). Among the fish fed dietary turnip or its extracts, there was no significant difference
in growth and survival (P>0.05). However, turnip supplementation tended to increase growth in
comparison to control diet. Food conversion ratio (FCR) and protein efficiency ratio (PER) were
significantly higher in fish fed diets with turnip and its extract than those fed the biofuel
algae and control diets. Our study indicated that turnip seems to have a growth enhancing effects
in juvenile rainbow trout. This positive effect might be connected with some phytochemicals,
which is reported as antioxidant and health promoting properties of turnip. Further studies are
needed to disclose the effect of dietary turnip on rainbow trout. 
Turnip (Brassica rapa); feed; growth; rainbow trout 
IRIS
• Methanol (Non-Cancer)
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