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Paper Information

Journal:   JOURNAL OF MARINE SCIENCES AND TECHNOLOGY   FALL 2012 , Volume 11 , Number 3; Page(s) 45 To 54.
 
Paper: 

EFFECT OF FEEDING RAINBOW TROUT LARVAE (ONCORHYNCHUS MYKISS) WITH ARTEMIA NAUPLII ENRICHED WITH VEGETABLE OILS ON RESISTANCE AGAINST O2, SALINITY AND TEMPERATURE STRESSES

 
 
Author(s):  KAZEMI ESMAEIL, AGH NASER*
 
* ARTEMIA AND AQUATIC ANIMALS RESEARCH INSTITUTE, URMIA UNIVERSITY, URMIA, IRAN
 
Abstract: 

Chronic stresses can influence the behavioral and physiological activities of animals and can lead to reduction of resistance against disease and decrease in growth rate and production. Artemia nauplii enriched with essential nutrients particularly fatty acids have been used to promote growth, survival and resistance of different species of aquatic animals to various environmental stresses as well as infectious diseases. In this study we investigated the resistance to environmental stress (temperature, salinity and hypoxia) in larvae of rainbow trout fed Artemia nauplii enriched with vegetable oils. The experiment was carried out in 6 triplicate treatments for a period of 10 days. The feeding treatments included: 1) commercial starter feed for trout (Control) 2) Artemia nauplii enriched with fish oil, 3) Artemia nauplii enriched with sunflower oil, 4) Artemia nauplii enriched with canola oil, 5) Artemia nauplii enriched with soybean oil and 6) newly hatched nauplli of Artemia. The results showed significant differences in tolerance of fish larvae to high temperature (20 and 25oC), hypoxia stress (5 ppm) and salinity stress (l0, 15 and 20 mg.l") among different groups. Highest survival (except in one case) was observed in larvae fed Artemia nauplii enriched with canola oil compared to those fed control diet ( p<0.05) but no significant difference was observed with larvae fed Artemia nauplii enriched with fish oil.

 
Keyword(s): RAINBOW TROUT, STARTER FEEDING, ENVIRONMENTAL STRESSES, ARTEMIA, ENRICHMENT
 
References: 
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