Chemical composition of fillet and some biochemical and enzymatic parameters of blood serum in Siberian sturgeon (Acipenser baerii, Brandt, 1869) at different weights

Subject Areas : New Technologies in Aquaculture Development

Firuz Zahed ¹ , مجید Mohammad Nejad ²

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Received: 2022-02-05 Accepted : 2022-02-05 Published : 2021-12-22

Keywords: Protein, blood, Fat, Siberian sturgeon, Keywords: Weight,

Abstract :

Abstract    Knowing the chemical composition of food consumed by humans is one of the important principles in preparing diets. The Siberian sturgeon is a good species for aquaculture due to its good growth in different sizes in breeding systems and its ability to reproduce sexually in captivity. In this study, the chemical composition of fillet and some biochemical and enzymatic indicators of blood serum in Siberian sturgeon in different weights were investigated. Fish in 5 groups of mean weight of 0.5-0.7 kg, 2.5-2 kg, 6-7 kg, 10-12 kg and 15-17 kg and with 3 fish from each group were studied. The results of the present study showed that with increasing weight and size of fish, the amount of protein, ash and fiber decreases and the amount of fat increases (P <0.05), but the amount of moisture at different weights does not differ (P> 0.05). The results of the present study showed that fish weight affects the biochemical parameters of fish serum, so that with increasing weight, the amount of cholesterol, triglyceride, urea and iron increases (P <0.05), but the amount of albumin, calcium, sodium and potassium did not change (P> 0.05). While the highest amount of protein in the weight group was 6 to 7 kg. Also, the level of stress indices (glucose and cortisol) increased with weight gain and the amount of serum enzymes was higher at low weights (P <0.05). The results of the present study showed that the size and weight of fish affect the chemical composition of fillet and some biochemical and enzymatic factors of fish blood serum.