Ectoparasite infestation and survival rate of pacific white shrimp (Litopenaeus vannamei) that immunized with crude protein Zoothamnium penaei in intensive ponds

The aim of research was to determine ectoparasite infestation and survival rate of L. vannamei immunized with Zoothamnium penaei crude protein in intensive ponds. This research was an experimental study to determine the effect of using feed and added crude protein Z. penaei to L. vannamei. The sample used was 10,000 (PL-11) L. vannamei. The collected data of ectoparasite infestatiton were analyzed by descriptive and variance analysis. There was a significant difference between the pacific white shrimp immunized with crude protein Z. penaei on the 1th, 30th, 60th and 90th days of maintenance (p< 0.05). The highest ectoparasite infestation occurred in L. vannamei aged 60 days, and 30 days respectively. An increase of ectoparasites infestation occurred on shrimp aged 30 to 60 days in the ponds, though there was no significant difference (P> 0.05). On 90 days of maintenance, there was an increase of ectoparasites infestation and it was significantly different from the infestations in shrimp aged 60 days in ponds (p<0.005). The survival rate of pacific white shrimp immunized with crude protein was the age of 90 days in the pond (79%). crude protein Z. penaei could suppress ectoparasite infestation and vannamei shrimp mortality in intensive ponds.