علوم زیستی دریا
j e; m m; h m; a gh
Abstract
A feeding trial was conducted to evaluate the effect of replacing fish meal protein with fermented soybean meal (FSM) on the growth performance, feed utilization, body composition and digestive enzymes activity of yellowfin sea bream (Acanthopagrus latus) juvenile. Five isonitrogenic and isolipidic diets ...
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A feeding trial was conducted to evaluate the effect of replacing fish meal protein with fermented soybean meal (FSM) on the growth performance, feed utilization, body composition and digestive enzymes activity of yellowfin sea bream (Acanthopagrus latus) juvenile. Five isonitrogenic and isolipidic diets were prepared with levels of 0 (control), 100, 150, 250 and 300 g kg-1 FSM. Triplicate groups (20 fish per tank) of yellowfin sea bream with initial weight of 2.51±0.01 g were hand-fed to visual satiation at three meals per day for 56 days. The fish fed diets containing different levels of FSM had no significant differences regarding Final weight, Weight gain, SGR, FCR and Survival with control group. Whole body proximate compositions of fish were not affected by dietary FSM level. The activity of digestive enzymes in the intestine was not affected by dietary FSM level. This study showed that up to 30% fish meal in the diets of juvenile yellowfin (Acanthopagrus latus) could be replaced by fermented soybean meal.
علوم زیستی دریا
j e; l r; a gh
Abstract
This study was conducted in order to bioaccumulation of heavy metals Zn, Cu, Cd and Pb in shell and muscle of white shrimp native species of Khouzestan Province in summer and winter of 2013, 80 samples were collected from station of Bahrekan in coast of Hendijan, West-North of Persian Gulf. Then Biometry ...
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This study was conducted in order to bioaccumulation of heavy metals Zn, Cu, Cd and Pb in shell and muscle of white shrimp native species of Khouzestan Province in summer and winter of 2013, 80 samples were collected from station of Bahrekan in coast of Hendijan, West-North of Persian Gulf. Then Biometry and preparation of shell and muscle samples, metals were extracted using acid digestion method and concentration of heavy metals was measured by Atomic Absorption Spectrophotometer. Results showed that in shell and summer total of metals were higher than muscle and winter season and was significant relationships between them (P≤0.05). The maximum concentration of Zn in shell and two season summer and winter observed (44.61± 1.67 and 16.33±1.37 mg/kg dry weigh) and the minimum concentration of Cd (0.1±0.004 and 0.001±0.0001 mg/kg dry weigh) was determinate. There was a significant relationship between water and shrimp for accumulation of heavy metals in two seasons (P≤0.05). Results showed accumulation of Cd was higher than the NHMRC and the INSO standard.