Paper Information

Journal:   RENEWABLE NATURAL RESOURCES RESEARCH   FALL 2016 , Volume 7 , Number 3 (SERIAL NUMBER 25) #A00471; Page(s) 73 To 80.
 
Paper: 

Effects of Three Different Diets on Some Growth Performances and Survival Rates of European Whitefish (Coregonus lavaretus) Larvae

 
 
Author(s):  Shamsaei Mehrjan Mehdi, HOSSEINI SHEKARABI SEYED PEZHMAN*
 
* Department of Fisheries Science, Science and Research Azad University, Tehran, Iran
 
Abstract: 
The aim of this study is to define some growth performances and survival rate of European whitefish larvae when they were fed with three different feeding regimes until fingerlings stage. One hundred and fifty newly hatched white fish fry (4 0. 01 mm initial total length) randomly stocked into nine rearing net cages in a natural pond of Khojir research center, and nourished for 90 days with three kinds of food including rotifer (Brachionus plicatilis), rainbow trout commercial diet and a compound of rainbow trout commercial diet with live feed in a mixture of 50% of each. First month of rearing revealed that different feeding regimes cause significant differences between all groups (p<0. 05). The highest body gain (48. 00 0. 231 %), length gain (23. 65 0. 116 mm), specific growth rate (5. 36 0. 002%) and feed efficiency (63. 48 0. 539%) was obtain in the fish fed with live food in the first month of trial (p<0. 05). Also the same trend was observed in the second month of growing. However, in the third month of growing all growth indices except survival rate are improved in commercial diet in comparison to other groups (p<0. 05). According to results, whitefish larvae fed with rotifers as a live feed is recommended up to two months of rearing.
 
Keyword(s): Coregonus lavaretus,Commercial diet,Growth,Rotifer,Whitefish
 
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