Evaluation of Formulated Diets Enriched by Spinach Extracts for the Broodstock Females, Portunus pelagicus (Linnaeus, 1758)

Growth performance and survival rate of Portunus pelagicus (Linnaeus, 1758) broodstock females fed varying doses of amaranth extracts

“…The data for growth performance (absolute weight gain, absolute carapace length, and absolute carapace width) and survival rate 7 were analyzed using one-way ANOVA and Duncan's Multiple Range test to compare the differences among the means of the different treatments 33 were performed using SPSS software (version 19.0 for Windows; SPSS Inc., Chicago, II. Arcsine transformation was performed before the data, in percentages, was analyzed.…”

“…The female crab samples were collected from the coastal region of Padang (100° 22'12" BT, 1° 0' 54" LS dan 100° 25'58,8" BT, 1° 4' 40,8" LS), West Sumatra, and the crabs were placed randomly in four concrete tanks (200 cm × 100 cm × 100 cm), each divided into five units, i.e., plastic boxes (45.5 cm × 32.5 cm × 16.5 cm), where the crabs were held at a maximum density of one crab per box. Tanks were provided with approximately a 15-cm-thick layer of sand for substrate and with adequate aeration 2,7,8,[26][27][28] . The crabs were maintained in monitored water with a water depth of 25 to 30 cm, salinity of 30 to 32 ppt, pH 7.77 to 7.96, temperature 26 to 27°C, and dissolved oxygen (DO) 7.00 to 7.30 ppm.…”

“…Measured parameters (absolute weight gain, absolute carapace length, absolute carapace width and survival rate) and water quality refer to Efrizal et al 7 . The absolute weight gain was calculated as follows: AWG = WG f -WG o , where AWG is weight gain (g), WG f is the weight of the crab at the end of experiment (g), and WGo is the weight of crab at the start of experiment (g).…”

“…The crab (Portunus pelagicus) belongs to the Portunidae family, is a marine biota resource. It has great potential to become an important fishery export commodity [2][3][4][5][6] , since in recent years, domestic and international demand has increased from year to year 7,8 . According to data from the last ten years for the period 1993-2002, the export volume of crabs increased by an average of 16.72% per year, from 6,081 tons in 1993 to 11,246 tons in 2002 1 , whereas in the period 2007-2009 reports on the Indonesian market share of crab decreased from 17.6% to 16.3% 9 .…”

“…The business of crab farming is still in its early phase in Indonesia and in many countries in the world 17 . Some researchers have reported that a low growth performance and the survival rate remain as problems in culture of the blue swimming crab 17 , which is caused by various factors, such as disease [18][19][20] , molting syndrome 21 , cannibalism 22 , and feed 3, 7,8 . Feed is the main component needed by the crab to survive and grow.…”