Effects of multiwalled carbon nanotubes and carbofuran on metabolism in Astyanax ribeirae, a native species

Author(s)

Barbieri, Edison ^[1] ; Tegon Ferrarini, Alessandra Maria ^[1] ; Oliveira Rezende, Karina Fernandes ^[2] ; Teodoro Martinez, Diego Stefani ^[3] ; Alves, Oswaldo Luiz ^[4]

Affiliation

^[1] SP Governo Estado Sao Paulo, Inst Pesca APTA SAA, Caixa Postal 157, Av Prof Besnard S-N, BR-11990000 Cananeia, SP - Brazil

^[2] Univ Sao Paulo, Inst Ciencias Biomed, Sao Paulo - Brazil

^[3] Ctr Nacl Pesquisa Energia & Mat, Lab Nacl Nanotecnol, BR-13083 Campinas, SP - Brazil

^[4] Univ Estadual Campinas, Inst Chem, Lab Solid State Chem, BR-13083970 Campinas, SP - Brazil

• Document type: Journal article
• Source: FISH PHYSIOLOGY AND BIOCHEMISTRY; v. 45, n. 1, p. 417-426, FEB 2019.
• Web of Science Citations: 4

Abstract

The study of the toxic effect of carbofuran and multiwalled carbon nanotubes (MWCNTs) on Astyanax ribeirae metabolism is of paramount importance due to the increasing use of this pesticide in agriculture and in the production of nanotubes within the material industry. This study aimed to evaluate the effects of carbofuran, MWCNT, and the combination of these compounds on specific oxygen consumption and excretion of ammonia in A. ribeirae. Therefore, 65 fish were divided into three groups of treatments at varying concentrations: carbofuran (0.01, 0.05, 0.1, and 0.5mg/L), MWCNT (0.1, 0.25, 0.5, and 1.0mg/L), and 0.5mg/L of MWCNT added to carbofuran concentrations (0.01, 0.05, 0.1, and 0.5mg/L). The average specific oxygen consumption in the groups exposed to carbofuran, compared to the control, increased 73.49% at the 0.01mg/L concentration and decreased 63.86% and 91.57% with treatments of 0.1 and 0.5mg/L, respectively. For groups exposed to the MWCNT, there was an 83.91% drop with the 1.0mg/L treatment, and the carbofuran + MWCNT groups recorded a decrease of 71.09%, 92.77%, and 93.98% at concentrations of 0.05, 0.1, and 0.5mg/L, respectively. In relation to specific ammonia excretion, in groups exposed to carbofuran compared to the control, there was an increase of 134.37% and 200% with the 0.1 and 0.5mg/L treatments, respectively. The group exposed to carbofuran + MWCNT experienced a decrease of 60% and 80% with treatments of 0.1mg/L carbofuran + 0.5mg/L MWCNT and 0.5mg/L carbofuran + 0.5mg/L MWCNT, respectively. Therefore, it was concluded that carbofuran + MWCNT interact, increasing the effects in Astyanax sp. (AU)