title: Histological changes in gills of two fish species as indicators of water quality in Jansen Lagoon (São Luís, Maranhão State, Brazil).
abstract: Water quality of the Jansen Lagoon (São Luís, Maranhão State, Brazil) was assessed through histological biomarkers and microbiological parameters. To this end, 29 fish specimens (11 Centropomus undecimalis and 18 Sardinella sp) and eight water samples were collected during the rainy and dry periods of 2013. The lagoon water showed thermotolerant coliform indices above the limit set forth in CONAMA Resolution 357/2005. Histological changes observed in the gills were: lifting of the respiratory epithelium, hyperplasia of the lamellar epithelium, incomplete and complete fusion of several lamellae, disorganization of the lamellae, congestion of blood vessels, aneurysms, hypertrophy of the respiratory epithelium, hemorrhage and rupture of the lamellar epithelium and parasite. The histological alteration index (HAI) average value to Sardinella sp was 31.8 and to C. undecimalis was 22.2. The average HAI value in both species corresponds to category 21-50, with tissue injuries being classified from moderate to severe. The presence of histological injuries and the HAI values indicate that the fish sampled from the Jansen Lagoon are reacting to non-specific xenobiotics present at the site.
authors.affiliation: Departamento de Química e Biologia, Universidade Estadual do Maranhão, São Luís-MA, 65055-000, Brazil. debsan70@gmail.com.
authors.forename: Débora M S
authors.initials: DM
authors.lastname: Santos
authors.affiliation: Departamento de Química e Biologia, Universidade Estadual do Maranhão, São Luís-MA, 65055-000, Brazil. mercia21melo@gmail.com.
authors.forename: Mércia Regina S
authors.initials: MR
authors.lastname: Melo
authors.affiliation: Departamento de Química e Biologia, Universidade Estadual do Maranhão, São Luís-MA, 65055-000, Brazil. denisemendes2@yahoo.com.br.
authors.forename: Denise Carla S
authors.initials: DC
authors.lastname: Mendes
authors.affiliation: Departamento de Química e Biologia, Universidade Estadual do Maranhão, São Luís-MA, 65055-000, Brazil. iolanda.rbarros@gmail.com.
authors.forename: Iolanda Karoline B S
authors.initials: IK
authors.lastname: Rocha
authors.affiliation: Departamento de Química e Biologia, Universidade Estadual do Maranhão, São Luís-MA, 65055-000, Brazil. jakelinepriscila@gmail.com.
authors.forename: Jakeline Priscila L
authors.initials: JP
authors.lastname: Silva
authors.affiliation: Departamento de Química e Biologia, Universidade Estadual do Maranhão, São Luís-MA, 65055-000, Brazil. sildianebio@gmail.com.
authors.forename: Sildiane M
authors.initials: SM
authors.lastname: Cantanhêde
authors.affiliation: Departamento de Ciências Fisiológicas, Universidade Estadual de Londrina, PR, 86057-970, Brazil. pcmeletti@gmail.com.
authors.forename: Paulo C
authors.initials: PC
authors.lastname: Meletti
mesh_terms: D000818:Animals; D015415:Biomarkers / Q000378:metabolism; D001938:Brazil; D004781:Environmental Exposure; D004784:Environmental Monitoring; D005399:Fishes / Q000378:metabolism*; D005880:Gills / Q000187:drug effects*; D010473:Perciformes / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000633:toxicity*; D060753:Water Quality
chemical_list: D015415:Biomarkers; D014874:Water Pollutants, Chemical