Tambaqui, Colossoma macropomum. (Photo: SFC)
Aerators allow tambaqui farming productivity to triple
Tuesday, November 13, 2012, 23:20 (GMT + 9)
A team of researchers from the Brazilian Agricultural Research Corporation (Embrapa) Amazônia Ocidental managed to increase the productivity of tambaqui (Colossoma macropomum) farming three to four times, compared to the average in this state, by using aerators.
The group explains the aerators help improve water quality, provide greater oxygen availability, reduce fish stress and prevent the onset of diseases and parasites that affect fish.
The new technique makes it possible for the specimen density to increase in existing ponds, without opening new areas for pond construction, Embrapa Amazônia Ocidental reported.
According to Roger Crescêncio, a researcher of the entity, the use of aerators during the tambaqui (also known as black pacu, black-finned pacu, giant pacu, cachama and gamitana) farming process in the Amazon enabled the production of an average of 19 tonnes per hectare.
The scientist details that with the increase in fish density between 16 and 24 tonnes per hectare were obtained, about three to four times more than the state average, which is between 5 and 6 tonnes per hectare.
"The main difficulty encountered by fish farmers is the environmental permit procedure," said Crescêncio.
And he added: "By adopting this technology, production is tripled without new infrastructure or new environmental permits, and it is possible to expand production."
During the study, the group of Embrapa also assessed the sexual maturation in males and females of tambaqui and related these data with the weight and length of these fish throughout the farming process.
The researchers explain that the sexual maturation usually begins at different times in males and females of the same fish species, and this lack of synchronization can lead to differences in growth, such as weight gain and growth.
By Analia Murias