4.8. Data Processing

One-way ANOVA studies were carried out for total content of mycotoxins as well as for each mycotoxin individually, considering different factors, namely: presentation (pellet or flour), sampling point (silo, feeder, sack and bulk storage without container in warehouse), and type of animal feed (piglet, gilts, sows and fattening pigs). When this information was not available, the sample was not included in the study. These studies were performed to determine statistical differences with a level of confidence of 95%.

PRESENTATION. A total of 226 samples were analysed, 183 presented as flour and 43 as pellet (n = 43). The two samples of maize (grain) were excluded from this study.

SAMPLING POINT. In this case, a total of 137 were processed, 77 samples were collected from a silo, 29 from a feeder, 25 from a sack and 6 were stored in bulk without container in warehouse.

TYPE OF ANIMAL. Another factor is the type of pig for which the compound feed is intended. In this sense, different types of feed (classified according to the necessities of the animal) can be distinguished: piglets (n = 111), fattening (n = 71), gilts (n = 2) and sows (n = 42). The two samples of maize (grain) were excluded from this study.