Sakineh Yeganeh

Dietary effects of Spirulina platensis on hematological and serum biochemical parameters of rainbow trout (Oncorhynchus mykiss).

This study evaluated the effects of diets containing 0, 2.5, 5, 7.5 and 10% of Spirulina platensis on hematological and serum biochemical parameters of rainbow trout (Oncorhynchus mykiss). Fish (n=180; 101±8 g) were randomly divided into fifteen 300 L fiberglass tanks in triplicates for a period of ten weeks. The RBC, WBC, hemoglobin, total protein and albumin levels increased significantly in the groups supplemented with S. platensis. Dietary inclusion of S. platensis had no significant effects on hematocrit, cholesterol, triglyceride and lactate of the blood. HDL-cholesterol was larger in rainbow trout fed 10% S. platensis in comparison with the other diets, whereas LDL-cholesterol significantly decreased with increasing of S. platensis inclusion. Cortisol and glucose significantly decreased with increasing of S. platensis inclusion. The present results demonstrate that inclusion of 10% S. platensis can be introduced as an immunostimulant in rainbow trout diets.

The Effect of Sodium Caseinate Coating Incorporated with Zataria moltiflora Essential Oil on the Quality and Shelf Life of Rainbow Trout During Refrigerated Storage

ABSTRACT In the present study, aqueous solutions of sodium caseinate (SC) 8% (w/w) were provided in the form of four treatments—including SC without any essential oil (EO) as well as SC with 0.25, 0.5, and 1% (v/w) concentrations of Zataria moltiflora EO. Fish samples were treated with aqueous solutions and stored at 4 ± 1°C for 20 days. The control and treated fish samples were analyzed for chemical (total volatile basic nitrogen, pH, thiobarbituric acid, peroxide value), microbiological (total viable count and psychrotrophic count), and sensory analyses every 4 days. Based on results, SC edible coating had no antimicrobial effect but acted like a barrier against the fish flesh contamination. Moreover, incorporating Zataria moltiflora EO with SC edible coating reduces peroxide value and thiobarbituric acid-reactive substances values as well as the chemical and microbiological spoilage of refrigerated fish samples. Furthermore, sensory evaluation results showed that the presence of thyme oil improved the sensory quality of the rainbow trout.

Toxicity of organic selenium (Selemax) and its effects on haematological and biochemical parameters and histopathological changes of common carp (Cyprinus carpio L., 1758)

Abstract The aim of this study was to assess the effect of organic selenium (Selemax) on Common carp (Cyprinus carpio). The effect was determined on basis of acute toxicity, haematological, biochemical profile and histopathology. A static toxicity test was performed for the determination of 96 h median lethal concentration. The 96hLC50 value of Selemax was 0.54 mg/L. For investigation of chronic toxicity, the experimental group exposed to Selemax in concentration 0.054 mg/L (10% 96hLC50) during 28 days showed significant changes in haematological and biochemical profile and caused histopathological changes in liver, and kidney. According to those data, it was possible to classify organic selenium as highly toxic for carp. The alterations of these parameters can be used as suitable biomarkers in monitoring of organic selenium in the aquatic environment.