Productivity of white shrimp (Litopenaeus vannamei, Boone 1931) on semi-intensive cultivation ponds in Parangtritis Village, Bantul Regency

This study aimed to determine the productivity of white shrimp (Litopenaeus vannamei, Boone 1931) in semi-intensive ponds in Parangtritis Village, Bantul Regency. The study was conducted from January to February 2021. The study was conducted by direct observation of two ponds with a stocking density of average 95 shrimps larvae/m2. The ponds studied had the same area of 2,000 m2, the depth of pond water was 1 m at the edge and 1.5 m in the middle, and the water volume was about 2,500 m3. The source of water was pumped directly from the sea water of Parangtritis Beach, Indian Ocean. The data of ponds shrimp production were obtained from observations of shrimp harvests at that time (as primary data) and yields of several cycles from 2014 to 2020 (as secondary data). The results of data collection were presented descriptively. The results showed that the shrimps were reared in the ponds for each production cycle within 76 to 120 days (average 95 days), harvesting was done partially (1 to 4 times), with pond productivity ranging from 14,600 to 41,175 kg of shrimp/hectare/cycle (average 25,133 kg shrimp/hectare/cycle), feed conversion ratio 1.0 to 2.2 (average 1.3) and survival rate 67 to 100 (average 95). The productivity of ponds at Parangtritis Village coastal were higher than other Bantul Regency coastal area. These were probably because of: the quantity and quality of water sources were better; the layout of the pond were not too crowded; and stocking densities could be higher and shrimp were partially harvested.