Growth and enzymatic profile of the Pacific white shrimp fed with Porphyridium cruentum extract


  • Renata Avila OZÓRIO Departamento de Aquicultura, Centro de Ciências Agrárias, Universidade Federal de Sana Catarina (UFSC)
  • Rafael Garcia LOPES Departamento de Aquicultura, Centro de Ciências Agrárias, Universidade Federal de Sana Catarina (UFSC)
  • Bruna GÓES GÓES Departamento de Aquicultura, Centro de Ciências Agrárias, Universidade Federal de Sana Catarina (UFSC)
  • Carlos Peres da SILVA Departamento de Bioquí­­mica, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina (UFSC). Campus Universitário Reitor João David Ferreira Lima
  • Roberto Bianchini DERNER Departamento de Aquicultura, Centro de Ciências Agrárias, Universidade Federal de Sana Catarina (UFSC)
  • Débora Machado FRACALOSSI Departamento de Aquicultura, Centro de Ciências Agrárias, Universidade Federal de Sana Catarina (UFSC)


Litopenaeus vannamei, microalgae, polysaccharide, digestive enzymes


The study was developed to evaluate the influence of diet supplementation of a polysaccharide extract from the microalgae Porphyridium cruentum, on weight gain, digestive enzyme activity, and Litopenaeus vannamei juvenile survival. The polysaccharide crude extract from microalgae P. cruentum was added at different concentrations (0, 0.5, 1, 1.5, and 2.0%) in a commercial diet and provided to juvenile L. vannamei (6.6 ± 0.2 g). The shrimps (n =2,000) were fed ad libitum for 30 days in circular tanks with 12 m2 of bottom area (100 shrimp tank-1) and environmental variables (temperature, salinity, dissolved oxygen, photoperiod and level of total ammonia) were controlled. The supplemented diet with 1% crude extract was responsible for the biggest weight gain (7.28 g) in 30 days. The shrimp body muscle centesimal composition and survival were not affected by the polysaccharide extract supplementation. It was observed a shift in the activity of digestive enzymes from the hepato-pancreas to the anterior midgut and mid midgut portions in shrimps with diet supplemented with 1% polysaccharide extract, which may have contributed to a better digestive efficiency. The results indicate that dietary supplementation with crude extract of P. cruentum polysaccharides in a range between 1 and 1.5% increases weight gain and enhances the activity of digestive enzymes in L. vannamei juveniles.


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