Differential biochemical responses to metal/metalloid accumulation in organs of an edible fish (Centropomus parallelus) from Neotropical estuaries

Author(s):Show less -

Souza, Iara da C. ^{[1, 2]} ; Morozesk, Mariana ^[2] ; Bonomo, Marina M. ^[2] ; Azevedo, Vinicius C. ^[2] ; Sakuragui, Marise M. ^[2] ; Elliott, Michael ^[1] ; Matsumoto, Silvia T. ^[3] ; Wunderlin, Daniel A. ^{[4, 5]} ; Baroni, V, Maria ; Monferran, V, Magdalena ; Fernandes, Marisa N. ^[2]

Affiliation

^[1] Univ Hull, IECS, Kingston Upon Hull HU6 7RX, N Humberside - England

^[2] Univ Fed Sao Carlos, Dept Ciencias Fisiol, Rod Washington Luiz, Km 235, BR-13565905 Sao Carlos, SP - Brazil

^[3] Univ Fed Espirito Santo, Dept Ciencias Biol, Ave Fernando Ferrari 514, BR-29075100 Vitoria, ES - Brazil

^[4] V, Consejo Nacl Invest Cient & Tecn, ICYTAC Inst Ciencia & Tecnol Alimentos Cordoba, Ciudad Univ, RA-5000 Cordoba - Argentina

^[5] V, Univ Nacl Cdrdoba, Fac Ciencias Quim, Ciudad Univ, RA-5000 Cordoba - Argentina

• Document type: Journal article
• Source: ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY; v. 161, p. 260-269, OCT 15 2018.
• Web of Science Citations: 1

Abstract

Metal/metalloid accumulation in fish organs elicits biochemical responses indicating the overall fish and environmental health status. This study evaluated the bioaccumulation of metals and metalloid in relation to a suite of biochemical biomarkers (superoxide dismutase, catalase, glutathione-S-transferase, Na + /K + -ATPase, H + -ATPase, acetylcholinesterase activities and the levels of glutathione, metallothionein, lipid peroxidation and oxidized protein) in different organs of fish, Centropomus parallelus, in Vitoria Bay and Santa Cruz estuaries (State of Espirito Santo, Brazil) with distinct contamination levels. Metal and metalloid concentrations differ in each organ and were significantly higher in winter than in summer. Chemometric evaluation performed between metal/metalloid accumulation and the biomarkers revealed a complex scenario in which the biomarker responses depend on both metal accumulation and organ/tissue sensitivity. The metal levels in gills indicate fish contamination mainly via water and the low sensitivity of this organ to most metals. Biomarker responses suggested that the metal elimination pathway is through the gills and kidney. The hepatopancreas and kidneys were the most important detoxification organs while muscle was the less reactive tissue. In general, the finding suggested that, C. parallelus is partly able to tolerate such metal contamination. However, it is emphasized that the biomarker responses imply an energetic cost and may affect the growth rate and reproduction. Given the ecological and economic importance of C. parallelus, the level of toxic metals/metalloids in juvenile fish is an important early-warning for the maintenance, conservation and commercial use of this species. (AU)

• FAPESP's process: 14/04832-3 - Study of the origin and metal transference in mangrove areas through isotopic analysis in the trophic chain and biochemical and morphological effects in Centropomus parallelus
• Grantee: Iara da Costa Souza
• Support Opportunities: Scholarships in Brazil - Doctorate