The effect of n-3HUFA and vitamin C- enriched Artemia urmiana nauplii resistance to environmental stresses of temperature and O2 shortage in rainbow trout (Oncorhynchus mykiss) larvae

The use of live food is important in larviculture. In aquaculture enriched Artemia nauplii with essential nutrients particularly HUFA and vitamin C has been used in order to increase growth, survival rate, and resistance to various environmental stresses as well as infectious diseases. The objective of this study was to investigate the resistance to environmental stress in larvae of rainbow trout by feeding n-3 HUFA and vitamin C enriched Artemia nauplii. Larvae were reared until 2 weeks in 4 treatments: 1= artificial food, (commercial starter pellet for trout) 2= newly hatched Artemia, 3= enriched Artemia and 4= 10%enriched Artemia and 90% artificial food. The best result of resistance to temperature (up 24 ºC) and O2 shortage (for five minute) was observed in larvae that reared on treatment 3 respectively with 91.34±1.52 and 77±1 percent (p<0.05).