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0.05). Digestive enzymes were affected by different astaxanthin levels, and with increasing dietary astaxanthin, digestive enzymes increased significantly (p < 0.05). Finally, the results of this study showed that increasing dietary astaxanthin levels improved the activity of antioxidant parameters, and digestive enzymes of the oriental river prawn, and suggests that diet containing 150 mg/kg of this pigment to improve the mentioned parameters of this prawn. n.]]>
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0.05). Male and female sharks showed negative and positive allometric growth respectively. Also, the b value of females (3.23) was more than of male (2.93) (p < 0.05). Asymptotic length (L∞), growth rate (k) and t0 of males were 75.9 cm, 0.93 per year and -0.8; those for females were 75.85 cm, 0.94 per year and -0.79 years respectively. The results derived of this study can useful for determining strategies for further conservation and management policies aimed to preserve the biodiversity of C. arabicum.]]>
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