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The effects of dietary supplementation of lutein on the growth, haematological profile and pigmentation in target tissues of the soft‐shelled turtles were investigated. Five experimental diets were prepared with lutein levels at 1.16 (D1, control), 70.3 (D2), 132 (D3) and 239 (D4) mg kg−1, and one more high inclusion level of 3410 mg kg−1 (D5) was included for tolerance test. Each diet was fed to...
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