title: The interaction rainfall vs. weight as determinant of total mercury concentration in fish from a tropical estuary.
abstract: Mercury loads in tropical estuaries are largely controlled by the rainfall regime that may cause biodilution due to increased amounts of organic matter (both live and non-living) in the system. Top predators, as Trichiurus lepturus, reflect the changing mercury bioavailability situations in their muscle tissues. In this work two variables [fish weight (g) and monthly total rainfall (mm)] are presented as being important predictors of total mercury concentration (T-Hg) in fish muscle. These important explanatory variables were identified by a Weibull Regression model, which best fit the dataset. A predictive model using readily available variables as rainfall is important, and can be applied for human and ecological health assessments and decisions. The main contribution will be to further protect vulnerable groups as pregnant women and children. Nature conservation directives could also improve by considering monitoring sample designs that include this hypothesis, helping to establish complete and detailed mercury contamination scenarios.
authors.affiliation: Laboratório de Ecologia e Gerenciamento de Ecossistemas Costeiros e Estuarinos, Departamento de Oceanografia, Universidade Federal de Pernambuco, CEP 50740-550, Recife, Brazil. mario.barletta@pq.cnpq.br
authors.forename: M
authors.initials: M
authors.lastname: Barletta
authors.forename: L R R
authors.initials: LR
authors.lastname: Lucena
authors.forename: M F
authors.initials: MF
authors.lastname: Costa
authors.forename: S C T
authors.initials: SC
authors.lastname: Barbosa-Cintra
authors.forename: F J A
authors.initials: FJ
authors.lastname: Cysneiros
mesh_terms: D000818:Animals; D001835:Body Weight; D004784:Environmental Monitoring / Q000379:methods*; D005399:Fishes / Q000502:physiology*; D008628:Mercury / Q000032:analysis* / Q000378:metabolism; D009132:Muscles / Q000378:metabolism; D011891:Rain / Q000737:chemistry; D014329:Tropical Climate; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000378:metabolism; D014877:Water Pollution, Chemical / Q000706:statistics & numerical data*
chemical_list: D014874:Water Pollutants, Chemical; D008628:Mercury