
Progress in diet development for blue swimmer crab, Portunus pelagicus , juveniles: Effect of dietary phospholipid on survival, development, growth and resistance to osmotic shock
Author(s) -
Noordin Noordiyana Mat,
Zeng Chaoshu,
Southgate Paul C.
Publication year - 2018
Publication title -
aquaculture nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.941
H-Index - 79
eISSN - 1365-2095
pISSN - 1353-5773
DOI - 10.1111/anu.12822
Subject(s) - portunus pelagicus , biology , zoology , salinity , dry matter , osmotic shock , phospholipid , fishery , crustacean , ecology , biochemistry , membrane , gene
This study examined the effects of dietary phospholipid ( PL ) level on survival, growth, development and resistance to osmotic shock of early blue swimmer crab, Portunus pelagicus , juveniles. Six iso‐lipidic diets formulated to contain PL at 0 (basal), 30, 60, 90, 120 and 150 g/kg (dry matter) were offered to first‐stage crabs (C1) until they achieved C4 stage. Highest survival (93.3%) was achieved by crabs fed diets with PL supplementation levels of 120 and 150 g/kg. Crabs fed diets with PL supplementation levels of 120 and 150 g/kg developed to C4, on average, in 14 days, which was significantly faster ( p < 0.05) than crabs in all other treatments. Crabs fed with the same diets also had significant greater dry weight than crabs in other treatments ( p < 0.01), except those fed the diet supplemented with 90 g/kg PL ( p > 0.05). Dietary PL level markedly influenced survival of juveniles exposed to a stress test of low salinity (7 g/L); most crabs (>87%) fed diets supplemented with PL at 120 and 150 g/kg survived to the end of stress test. Dietary PL levels of 120 g/kg and 150 g/kg are suggested to maximize productivity in early P. pelagicus culture.