Evaluation of the influence of the environment of the nursery system in innate immunity of shrimps, Litopenaeus vannamei (Boone, 1931).

Author(s)

Renata Stecca Iunes

• Document type: Master's Dissertation
• Press: São Paulo.
• Institution: Universidade de São Paulo (USP). Instituto de Ciências Biomédicas (ICB/SDI)
• Defense date: 2013-03-25

Examining board members

Jose Roberto Machado Cunha da Silva; Sergio Luiz de Siqueira Bueno; José Roberto Kfoury Junior

• Advisor: Jose Roberto Machado Cunha da Silva

Abstract

The aquaculture production suffers different pressure in one hand disease, and in the other its environment impact. Different solutions are offered to solve this problems such as probiotics and immunostimulant to prevent and control the diseases with some or no success. Another option is the biofloc to minimize its environmental impact, with excellent results to zootechincal characteristics. But it is not known whether biofloc stimulate or inhibits the shrimp (Litopenaeus vannamei) immune system. That is what our study aim to answer if the biofloc system affects or not the total and differential hemocytes count, the phagocityc indexes of in vitro phagocytosis with Sacaromises cerevisae and the production of superoxide anion with the Nitroblue Tetrazolium (NBT) assay. At the first 2 month the animal rare in clear water had a higher total hemocyte count, while it was higher in the animals rare in the biofloc at the 4th month. At the 4th month the hyalines cells had a higher concentration in animals rare at biofloc system, while the granular and semi-granular cells had a lower concentration in this animals when compared with the ones rare at the clear water system. The phagocityc indexes and the production of superoxide anion did not have any difference between animals rare at clear water system and biofloc system. (AU)

• FAPESP's process: 10/04293-4 - Evaluation of the influence of the environment of the nursery system in innate immunity in shrimp, Litopenus vannamei (Boone, 1931)
• Grantee: Renata Stecca Iunes
• Support Opportunities: Scholarships in Brazil - Master