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6557658 
Journal Article 
Effects of formulated diets supplemented with vitamin E on the egg quality and ovi somatic index of female Portunus pelagicus broodstock 
Efrizal, E; Zakaria, IJ; Rusnam, M 
2020 
1 
Aquaculture, Aquarium, Conservation & Legislation (AACL) Bioflux
ISSN: 1844-8143
EISSN: 1844-9166 
13 
2 
768-777 
English 
The study of the blue swimming crab (Portunus pelagicus) broodstock nutrition is significant for achieving the reproductive success, which implicitly increases the larval quantity and quality in the mass production of cultured species. Therefore, the objective of this work was to determine the effects of the dosage of vitamin E in the diets on the egg quality and ovi somatic index of female P. pelagicus broodstock. Four dosage levels of vitamin E were tested: 0 IU kg-1 (control), 300 IU kg-1, 600 IU kg-1, and 900 IU kg-1, in a formulated diet (44.38% crude protein). P. pelagicus was fed once a day between 17.00 and 18.00 hours, at the ration of 3% of the body weight, for 40 days. The results showed that the fertilization rate, the egg hatching rate and the ovi somatic index increased with an increasing vitamin E dosage in the diet, from control (0 IU kg-1) to 300 IU kg-1, then it decreased when the dosage was increased up to 900 IU kg-1 formulated diet. A quadratic relationship existed between the dose of vitamin E (IU kg-) in the formulated diet and the egg quality incubation period (days) and ovi somatic index of the female P. pelagicus broodstock. The modification of the formulated diet by supplementation with different doses of vitamin E can reduce the incubation period of female P. pelagicus broodstock and increase the egg quality and ovi somatic index value of the female parent.