Zoothamnium penaei protein is able to maintain the viability of vaname shrimp reared in intensive ponds
By humas FPK On Friday, October 22 nd, 2021 ·

Lithopenaeus vannamei is one of the economically important shrimp imported from America. Since late 1993, Penaeus monodon has a relatively high mortality rate and because of this situation, many ponds have collapsed and production has fallen drastically from year to year. So that vannamei shrimp is one of the alternatives to be developed and several efforts have been made by the Government of Indonesia to switch to another species, namely L. vannamei, to increase export value significantly. But pathogenic infections have also occurred earlier.

One of the pathogenic protozoa that can attack shrimp is Zoothamnium penaei and causes zoothamniosis. Zoothamniosis is a parasitic disease in shrimp caused by Z. PENaei which usually lives with poor water quality. Handling of zoothamniosis in hatcheries and ponds using antibiotics is relatively better, but it causes shrimp resistance and leaves residue on shrimp.

The research group “Fish Health” has published many research publications to help maintain the health of fish and shrimp. Research led by Dr. Gunanti Mahasri or Bu Gun regarding “Ectoparasite infestation and survival rate of pacific white shrimp (Litopenaeus vannamei) that immunized with crude protein Zoothamnium penaei in intensive ponds” became one of the featured topics from FPK UNAIR. In this study wanted to determine the effect of the use of feed and the addition of crude protein Z. PENaei on L. vannamei. Crude protein Z. penaei will be developed as an immunostimulant material to prevent zoothamniosis in vaname shrimp in ponds.

The results showed that the crude protein Z. penaei had an immune response characterized by an increase in the number of haemocytes (THC) and differential haemocyte cells (DHC). Z. PENaei protein is able to preserve healthy white shrimp reared in ponds. In an effort to fight pathogens that enter the shrimp’s body during rearing, crude protein that enters the shrimp body will stimulate the activity of haemocyte cells in shrimp as well as haemocyte cells will experience degranulation and that certain proteins will be released for the benefit of the immune response, such as: an increase in haemocyte cells. and increased phagocytosis and trapping activity. In addition, crude protein will induce the release of proPO and protein-binding PPA by haemocytes, so that haemocyte cells increase their activity against disease agents, in this case Z. penaei, to trap and phagocytose.

On the other hand, the infestation and immune response in white vaname shrimp are also influenced by the quality of the rearing water, but based on the results of the analysis that has been carried out, it shows that the water quality is in optimal conditions for the shrimp to survive. Crude protein Z. penaei can suppress ectoparasite infestation and increase the survival of white shrimp (L. vannamei) from 26.78% to 71.34% by performing a 90-day rearing test in intensive shrimp ponds. In the future, Bu Gun will continue to conduct research on “Fish Health”. For those of you who are interested in this research we openly look forward to your participation. Please contact Dr. Gunanti Mahasri, Ir., M.Sc.

Source:

Mahasri, G., Mukti, A. T., Nisa, M., Prakosa, G. C., & Satyantini, W. H. (2021, February). Ectoparasite infestation and survival rate of pacific white shrimp (Litopenaeus vannamei) that immunized with crude protein Zoothamnium penaei in intensive ponds. In IOP Conference Series: Earth and Environmental Science (Vol. 679, No. 1, p. 012019). IOP Publishing.

Dr. Gunanti Mahasri, Ir., M.Sc.

Email : mahasritot@gmail.com