Abstract
Abstract: World aquaculture has been growing sharply in recent decades and Brazilian production of fish in cages has grown considerably since the end of the 1990s. This increase is related to the development of federal government regulations and the large number of medium and large hydroelectric reservoirs. The main areas of fish production in cages in Brazil are currently located in the Northeast and Southeast regions and along the Southeast/South border. Tilapia production in cages in Brazil, as well as other species produced in cages in other regions of the world, has economic advantages for the producer. On the other hand, limnologically, tilapia production in cages causes enormous damage, as it promotes the process of artificial eutrophication and, possibly, introduces this exotic species. One way of reducing artificial eutrophication is the use of Integrated Multi-trophic Aquaculture (IMTA); however, its use in fish cages installed in Brazilian reservoirs is not possible yet. Therefore, our view is that government agencies restrict the production of fish in cages to the utmost.
Highlights
World aquaculture has been growing sharply in recent decades and Brazilian production of fish in cages has grown considerably since the end of the 1990s. This increase is related to the development of federal government regulations and the large number of medium and large hydroelectric reservoirs
The main areas of fish production in cages in Brazil are currently located in the Northeast and Southeast regions and along the Southeast/South border
One way of reducing artificial eutrophication is the use of Integrated Multi-trophic Aquaculture (IMTA); its use in fish cages installed in Brazilian reservoirs is not possible yet
Summary
Aquaculture has increased markedly in recent decades, while the capture of aquatic organisms has stabilized since about the early 1990s. Fish cages have been used on a global scale (Ramos et al, 2014; Keeley et al, 2014; Cai et al, 2016; Urbina, 2016; Tomassetti et al, 2016; Adhikari et al, 2017; Salvo et al, 2017) and with different fish species (Mallasen et al, 2012; Urbina, 2016; Milne et al, 2017; Srithongouthai & Tada, 2017) This technology has been deployed in natural (Degefu et al, 2011; Price et al, 2015; White et al, 2017) and artificial (Nyanti et al, 2012; Montanhini Neto et al, 2017) aquatic environments
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