Uso de biomarcador histopatológico em brânquias de Centropomus undecimalis (Bloch, 1972) na avaliação da qualidade da água do Parque Ecológico Laguna da Jansen, São Luís - MA

Abstract

Uso de biomarcador histopatológico em brânquias de Centropomus undecimalis (Bloch, 1972) na avaliação da qualidade da água do Parque Ecológico Laguna da Jansen, São Luís -MA[Using histopathological biomarker in gills of Centropomus undecimalis (Bloch, 1972)

Histological Changes in Gills of Two Fish Species as Indicators of Water Quality in Jansen Lagoon (São Luís, Maranhão State, Brazil)

“…The presence of the Coliform bacteria group has a direct relationship to fecal contamination, as they inhabit the gastrointestinal tract of human beings and other homeothermic animals [ 15 , 16 ]. Research conducted by Cantanhêde et al , [ 17 ] where assessed the lagoon water and verified high levels of total and thermotolerant coliforms in the samples analyzed, the results suggest that the Jansen Lagoon is unfit for the purpose of water recreation and use of its fishing resources.…”

“…Cantanhêde et al , [ 17 ] in studies on C. undecimalis and Pereira et al [ 24 ], with Oreochromis niloticus collected in the Jansen Lagoon found significant gill injuries related to the presence of untreated domestic effluents discharged into the lagoon environment.…”

Evaluation of aquatic contamination in an urban lagoon environment in a coastal region in the north of Brazil

“…According to Hinton and Laurém (1990), the origin of an aneurysm is related to the depletion of the pillar cell system, which impairs vascular integrity through the release of large amounts of blood, pushing the lamellar epithelium outwards. Cantanhêde et al (2014), in a histological biomarker study using gills of the Centropomus undecimalis species from the Laguna da Jansen, found gill alterations which were classified as moderate to severe. Most of the histological changes observed in the present study, such as epithelial cell hypertrophy and hyperplasia, epithelial lifting and mucosal cells, lamellar fusion and aneurysms, can be interpreted as nonspecific responses to stress and have been described in fish exposed to a broad spectrum of pollutants (LUKIN et al, 2011).…”

“…The use of genotoxic biomarkers has been proposed as a method which can be used in environmental quality assessment, and therefore represents an effective warning tool for measuring biological effects in the environment (CAJARAVILLE et al, 2000).…”

Princípios bioéticos aplicados aos estudos ecotoxicológicos aquáticos

“…Studies on these beings can be conducted directly in the field or through tests in laboratory (experimental tests with distinct methodologies), regulated by national and international standards on the use of bioindicators organisms in such tests 18 . The aquatic organisms are usually used in ecotoxicological tests for various reasons 19 , among them their physiological processes, such as nutrition and breathing, as many of them breathe through gills in direct contact with water, which can carry many contaminants into the interior of these organisms, causing morphophysiological changes in them 20 .…”