Intensive fish farming has resulted in an increased concern for disease outbreaks. Probiotic use is one of the strategies being developed to improve fish health and productivity. Measures of probiotic colonization, growth performance, haematological characteristics and parasite load were used to evaluate the effect of diets supplemented with Enterococcus faecium on growth and health of Arapaima gigas juveniles. A completely randomized design with four treatments (diet with E. faecium at 1 × 106 CFU/g and 1 × 108 CFU/g, control diet and diet with the culture medium MRS) and three replicates was used. Ninety‐six Arapaima juveniles were distributed in 12 cages fed with the specified diet for 68 days. Colonization of the intestinal tract by lactic acid bacteria reduced the total number of heterotrophic bacteria in fish fed with probiotics compared to controls. Fish fed a supplemented diet containing 1 × 108 CFU/g presented higher values of weight gain, survival and fish growth uniformity, and lower values of feed conversion ratio. The prevalence of Trichodina sp. could have affected the survival of fish in the control group. Reduction in parasite load and an increase in haematocrit, the number of erythrocytes, thrombocytes, neutrophils and monocytes were also observed in fish fed the diet containing 1 × 108 CFU/g. Enterococcus faecium presented a probiotic effect in A. gigas juveniles and can be recommended for use at a concentration of 1 × 108 CFU/g to modify the gut microbiota, improve growth performance and haematology and reduce parasitic load.

No abstract

Food labeling has the function of providing information facilitating the decision-making power of the consumer on whether or not the food is consumed. Labeling of processed fish was observed in the supermarkets of the municipality of Castanhal-PA. A checklist based on Normative Instruction No. 22 of November 24, 2005 was applied for the evaluation of product labels. Two evaluations were carried out: first comparing the establishments with the mandatory items in the current legislation and the second, compared the labels of eight fish Products, including canned goods, where the labeling had the highest number of mandatory information. The best result was observed in supermarket "L" with averages of 6.5 points of adequacy to the legislation, the lowest values are attributed to the "I" supermarket with an average of 4.45. The absence of items 1, 3, 4, 5, 8, 9 of the checklist, which correspond to the name of the product, the name and address, the registration number of the competent authority, lot identification, conservation and defrosting respectively. Ineligible labels have been found or even in handwritten form. Packing date and expiration date information was contained on most packages, with the exception of frozen piramutaba fillet, batch identification, was not contained on the labels of various products, except for salmon fillet and canned.

No abstract

No abstract