ebrahim Alizadeh Doughikollaee
Volume 12, Issue 3 , September 2014, , Pages 91-100
Abstract
Heavy metals pollution directly has a negative effect on marine aquaculture such as shrimp culture. Heavy metals accumulated in the shrimp can be transported to humans through food chain. In this study, concentration of heavy metals (Cu, Zn, and Ni) in muscle tissue of western white leg Shrimp (Litopenaeus ...
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Heavy metals pollution directly has a negative effect on marine aquaculture such as shrimp culture. Heavy metals accumulated in the shrimp can be transported to humans through food chain. In this study, concentration of heavy metals (Cu, Zn, and Ni) in muscle tissue of western white leg Shrimp (Litopenaeus vannamei) in farms of Rig, Helle and Delvar sites of Bushehr province was determined. Heavy metals concentration was measured by atomic absorption. Results showed that there was a significant difference between Zn and Ni concentration of muscle shrimp in Rig, Helle and Delvar sites. The highest concentration of copper in Delvar, zinc in Rig and nickel in Heleh was observed 20.12 ± 1.28, 56.12 ± 9.33 and 9.10 ± 0.87 (μg / g DW) respectively. The comparison results of metal concentrations in muscle tissue of shrimp with FDA, WHO and FAO standards showed that the nickel content in muscle tissue is higher than the permissible level for human consumption and requires further monitoring.
علوم زیستی دریا
Ebrahim Alizadeh Doughikollaee; Mohammad Nouri; Naser Agh
Volume 11, Issue 2 , November 2012, , Pages 1-7
Abstract
Effect of salinity levels on density and population growth of parthenogenetic Artemia were studied. Cysts were hatched and 200 nauplii were transferred into cylindro-conical containers (1.5 liter) containing one-liter water at different salinities (50, 100, 150, 200 and 250 ppt) and cultured until maturity. ...
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Effect of salinity levels on density and population growth of parthenogenetic Artemia were studied. Cysts were hatched and 200 nauplii were transferred into cylindro-conical containers (1.5 liter) containing one-liter water at different salinities (50, 100, 150, 200 and 250 ppt) and cultured until maturity. After maturity, 3 female parthenogenetic Artemia wereselected randomly from each of the five levels of salinity and cultured in 4 replicates for 12 weeks. The growing Artemia were categorized into four population groups (1) nauplii and meta-nauplii, (2) juvenile Artemia (3) pre-adult Artemia, and (4) adult Artemia and were counted once a week. Results showed that the density of adults, nauplii and meta-nauplii were higher in 100 ppt. The maximum population of pre-adult and juvenile Artemia were found at 50 ppt. The density of adult Artemia increased while density of other categories decreased during culture period. Based on our findings, an inverse relationship between salinity and population of parthenogenetic Artemia were observed. Results indicated that lower salinities are more suitable for population growth of parthenogenetic Artemia.