Breeding and Rearing Giant Freshwater Prawn Larvae in Tanks Using Different Salinity

Abstract

While the population grows, and in order to keep food secured in rural areas, the possibility of "Breeding and Rearing Giant Freshwater Prawn Larvae in Tanks Using Different Salinity" was tested. The experiment aimed to (1) Analyze the potential for reproducing a gonad somatic index of freshwater prawn broodstock, (2) Analyze the protein levels of artificial foods for rearing freshwater prawn larvae in tanks, and (3) Compare the survival rates of freshwater prawn larvae until the post-larvae level using different salinity. There were three treatments using different levels of salinity: 9‰, 12‰, and 15‰. There were three more replicates to check for accuracy, and each replicate was put at 50 larvae/per litre. The amount of water per tank was 60 litres. There were two kinds of feeds, Artemia Nauplii, which was provided in the morning and at night time, and an artificial feed consisting of 10g of baby powder, the yolk of a chicken egg, 3% of oyster oil, and 1.5% of lecithin for each 1kg of the food. The artificial feed was given three times a day (10 am, 1 pm and 2 pm). The analysis showed that an average of 1g of gonad weight was equal to 610.63 eggs and therefore 100g of gonad weight was equal to 61,063 eggs. The amount of protein, furthermore, provided daily to the prawn larvae was 25.15%, lipid 49.46% and ash 3.98% respectively of the feed. We compared the survival rates and the first treatment, with 9‰ of salinity, was observed to enable a survival rate mean of 5.440.18%. The second, with 12‰ of salinity, enabled 13.68±0.50%, and the third enabled 7.23±0.24% with 15‰ of salinity. Therefore, freshwater larvae adapted best with 12‰ of salinity, which was the most suitable brackish water to nurse and rear the freshwater larvae to post-larvae level.