In this respect, automatic dispensers
that release food into the water in flooded systems have
been shown to effectively contribute to increase the food intake
of bullfrogs (Oliveira et al., 2009). According to these authors, this
finding is related to the constant movement of the food in water.
Positive effects such as better productive performance and feed
conversion have been observed in bullfrogs fed at high frequency
(upto 46mealsperday), also relatedtohighmovement ofinertfood
(Castro et al., 2012). Corroborating theses authors, we observed
that the greater movement of food improved the production performance.
Although food consumption was statistically similar in
both treatments, it is possible that there was more visual stimulation
of food by frogs fed in the vibrating feeder tray, where the food
movement was noticeably bigger. This greater visual stimulation
may have caused better feed efficiency, improving weight gain and
feed conversion of these animals compared to frogs fed in linear
feeders in which the movement of food, even constant was lower