Evaluation of environmental quality of two estuaries in Ilha do Maranhão, Brazil, using histological and genotoxic biomarkers in Centropomus undecimalis (Pisces, Centropomidae)

Abstract

Estuaries are subjected to continual environmental impacts from activities in the catchment areas. This research assessed the quality of two estuarine habitats located in Ilha do Maranhão, Brazil, through histological and genotoxic biomarkers in Centropomus undecimalis, comparing the data obtained to metal, physical, and chemical concentrations of water samples. The gill histological alterations were analyzed by the histological alteration index and genotoxic lesions in erythrocytes were detected by the Micronucleus Test. The analysis of metals revealed that all water samples contained at least two elements with concentrations higher than that allowed by the current Brazilian law. For gill histological analysis, snook of both areas assessed exhibited moderate lesions, indicating that the local fish are affected by environmental stress. Micronucleus analysis of snook showed that the Bacanga river basin is the most affected. In addition to assessing the health of commercial fish populations, the information about the biomarkers used for the species can serve to contribute to the preparation and/or application of health assessment models and implementation of environmental recovery policies for coastal aquatic environments.

Quality of water from fish farms and histopathological analysis of tilapia ( Oreochromis sp.) in São José de Ribamar and Paço do Lumiar, state of Maranhão, Brazil

“…Epithelial lifting is characterized by the elevation of a continuous epithelium lamina covering secondary lamellae away from the pillar cell system (Shailaja & D’Silva, 2003; Thophon et al, 2003), distancing the external environment and the arrangement of channels around the blood, compromising gas exchanges, requiring fish to increase respiration rate to compensate for the low oxygen uptake (Cantanhêde et al, 2016).…”

Contribuição dos atores da pesca para a bioecologia do Camurim Centropomus undecimalis (CENTROPOMIDAE – PERCIFORMES) capturado no litoral Amazônico brasileiro

“…Research, Society and Development, v. 9, n. 10, e4119108691, 2020 (CC BY 4.0) | ISSN 2525-3409 | DOI: http://dx.doi.org/10.33448/rsd-v9i10.8691 O C. undecimalis tem sido utilizado como sinalizador de qualidade ambiental em estudos de monitoramento de estuários no estado do Maranhão. Essa espécie é chave nesses estudos em função da sua bieocologia, em especial ao seu hábito carnívoro, migração entre diferentes ecossistemas e sua plasticidade ecológica (Cantanhêde et al, 2016;Pereira et al, 2015).…”

Evidence of reproductive disturbance in Astyanax lacustris (Teleostei: Characiformes) from the Doce River after the collapse of the Fundão Dam in Mariana, Brazil

“…(2020) and Weber et al (2020) observed high concentrations of metals, such as Iron (Fe), Aluminum (Al), Manganese (Mn), and Lead (Pb) in the Doce River, even three years after the dam broke. The presence of these metals in aquatic ecosystems can cause negative impacts on exposed organisms, such as genetic and reproductive damage, reduced growth rate and potentially fatal pathologies (Cantanhêde et al 2016, Viana et al 2018. Xenobiotics, such as metals, can act in different pathways in organisms, involving different physiological processes (Tolussi et al 2018), affecting sexual differentiation (Baroiller and Guiguen 2001) and gonadal development (Vested et al 2014), and inducing vitellogenin synthesis in males (Vetillard and Bailhache 2006).…”

“…The species of Astyanax genera are relatively small (10-12 cm, as an adult). They move in shoals and being important forage specie to shes in a higher lever of the trophic chain (Pereira et al, 2016). Astyanax lacustris (Lütken 1875) has morphological characteristics that include this species in the group also known as Astyanax bimaculatus.…”