Stressing stocking density and rearing time effect on whiteleg shrimp (Penaeus vannamei) reared intensively in floating cages
نویسندگان
چکیده
The stressing effect of stocking density and rearing time was assessed on shrimp Penaeus vannamei reared intensively in floating cages. Juvenile were stocked 9 m2 cages at 200, 250, 300 ind m-2 for a 25-day grow-out period. Total soluble protein concentration, superoxide dismutase (SOD), catalase (CAT) activities used as stress indicators muscle, hepatopancreas, hemocytes. Two-way ANOVA showed that content hepatopancreas significantly decreased rate increased (from 3.81 to 2.26 mg mL-1). Density interacted determine SOD activity muscle hemocytes where the maximum occurred densest by end study (10.21 122.41 U mg-1); CAT lower when highest (4.1 mg-1) used. Final weight (5.28-5.49 g), survival (90.2-91.9%), feed conversion ratio (0.75-0.78), specific (0.058-0.063), absolute (1.17-1.30 g week-1) growth rates not affected density, although yields varied (0.99-1.49 kg m-2). To conclude, despite causing shrimp, its antioxidant enzymatic prevented such development from negatively affecting growth, survival, ratio, production.
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ژورنال
عنوان ژورنال: Latin American Journal of Aquatic Research
سال: 2022
ISSN: ['0718-560X']
DOI: https://doi.org/10.3856/vol50-issue2-fulltext-2814