This study was conducted in order to measure glucose, cholesterol and hematocrit as indicators to evaluate the effect of caraway seeds meal (CSM) on the health and resistance of common carp to salinity stress. To attain this goal, fish (2.457±0.057 g) were divided into four groups fed on diets containing different levels of CSM; 0 (control), 0.5, 1 and 1.5%. After 56 days of feeding, blood samples of the fish were obtained in five stages (once before and four times after stress) to evaluate glucose, cholesterol and hematocrit levels. The experiments indicated that salinity sign-ificantly affected glucose, cholesterol and hematocrit. On the first day after stress, the hematocrit and glucose levels were considerably increased in all groups compared with their levels before stress. After stress, cholesterol level signif-icantly decreased in all groups compared to before stress. The level of hematocrit indicated no significant difference among the groups before and after stress. On the first day after stress, the glucose levels significantly increased in trea-ted groups with CSM compared with the control group. The glucose and hematocrit levels were decreased gradually in all groups from the third day on. After stress, no differences were observed for survival rates among the experimental diets. However, the highest survival rate belonged to treated groups with CSM. The overall result indicated that the suplement of CSM has a positive influence on the glucose, hematocrit and resistance of common carp to salinity stress.

Nowadays, the entrance of nanoparticles into high seas has led to toxic effects on aquatic organisms. Copper oxide nanoparticles is among the most widely used nanoparticles. The presence of these nanoparticles in the aquatic environments cause new environmental problems, which indicate the necessity of the examination of the effects of these nanoparticles on the aquatic organisms. The alfalfa plant has antioxidantive and regenerative effects due to its rich content of proteins, vitamin C and flavonoids. In this study, 6 (5 experimental and a control) groups were designed. Koi fish larvae were fed with biomar combined with various percentages of hay (0%, 10% and 20%) and were exposed to copper oxide nanoparticles with two concentrations (0 mg and 200 mg) for 14 days. The average initial length of larvae was 30.4 ± 0.01 mm, their average initial weight was 0.31 ± 0.05 and their age was around 20 dph. The specific growth rate, weight gain, length gain, survival rate and feed conversion ratio were calculated for each group. The results showed a significant higher growth rate in the groupstreated with 10% and 20% of alfalfa, as compared with the control group. In addition, the Cu NPs-treated group with 0% alfalfa rations showed the lowest rate of growth, as compared with the control group. Groups which were exposed to copper nanoparticles while receiving alfalfa-containing rations had growth indices better than the group exposed to copper nanoparticles and fed with 0% alfalfa ration, which indicated the antioxidant properties and growth-promoting effects of alfalfa.