Abstract
Background: Currently, great progress in the artificial propagation of commercially important portunid crabs of the genus Portunus has been achieved, and various methods have been adopted in mass-scale hatchery activities. This study analyzed the biological testing of formulated diets with different dose supplementations of vitamin E for the broodstock of female blue swimming crabs, P. pelagicus (Linnaeus, 1758) Methods: Female crab samples were collected from the coastal region of Padang, West Sumatra. The method used in this study was completely randomized design, with four treatment regimens (n=5 crabs each) of dietary vitamin E (0, 300, 600, and 900 IU/kg formulated diets). Results: The results show that the supplementation of vitamin E in the formulated diet had a significant effect (P <0.05) on the absolute weight growth, carapace length and carapace width. Conclusions: Supplementation of vitamin E on in formulated diet causes broodstock blue swimming crab molting, with a percentage value of 40-80% on day 20 and 20% on day 30, with a 100% survival rate.
Highlights
The market share of the crab, Portunus pelagicus, at the international level from year to year tends to increase, with the main markets in Singapore, Japan, the Netherlands, France, USA, Taiwan, Hong Kong, Korea, etc[1,2,3,4]
A total of 70 female crabs were collected on January 2018; 20 were females at stage II of ovarian maturity, which were selected for study
The female crab samples, with mean body weigth (BW) of 158.15 g, carapace length of 57.27 mm and carapace width of 123.54 mm were collected from the coastal region of Padang, West Sumatra, and randomly placed in four concrete tanks (200 × 100 × 100 cm)
Summary
The market share of the crab, Portunus pelagicus, at the international level from year to year tends to increase, with the main markets in Singapore, Japan, the Netherlands, France, USA, Taiwan, Hong Kong, Korea, etc[1,2,3,4]. Great progress in the artificial propagation of commercially important portunid crabs in the genus Portunus has been achieved and various methods have been adopted for mass-scale hatchery activities Farming this species has always been limited by the seasonal availability of spawning crabs from the wild and their inability to mature and spawn in culture ponds. It has become necessary to biologically test the supplementation of vitamin E for the formulated diets of broodstocks of females blue swimming crabs, Portunus pelagicus (Linnaeus, 1758). This study analyzed the biological testing of formulated diets with different dose supplementations of vitamin E for the broodstock of female blue swimming crabs, P. pelagicus (Linnaeus, 1758) Methods: Female crab samples were collected from the coastal region of Padang, West Sumatra. Conclusions: Supplementation of vitamin E on in formulated diet causes broodstock blue swimming crab molting, with a percentage value of 40–80% on day 20 and 20% on day 30, with a 100% survival rate.
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