In this kind of works, the possible negative effect of plants on growth
should be taken into account because of anti-nutritional factors (alkaloids,
tannins) that may affect the utilization of nutrients (Soetan,
2008). A. vera had no negative effect on growth, which is very important
since Courvalin (2006) mentions that the substances applied to culture
systems or added to the diet should not affect the productive
performance.
5. Conclusion
Results showed that A. vera does not affect shrimp growth and protects
it against WSSV and V. parahaemolyticus. Therefore, A. vera has the
potential to be used prophylactically as an antiviral and antibacterial
agent in cultured shrimp.