title: Bioaccumulation of heavy metals by shrimp (Litopenaeus schmitti): A dose-response approach for coastal resources management.
abstract: We reveal a dose-response relationship for bioaccumulation of Zn, Cu and Cr in shrimp Litopenaeus schmitti from Sepetiba Bay, Rio de Janeiro, Brazil. Our model estimates the current risk (AD50was 70% of the legal limit) and the daily metal uptake rate for each metal. It can also evaluate the relative reliability of predictions for tissue concentrations reaching the legal limits for human consumption (approximately 1year) and predictions related to asymptotic length, arising from (i) direct regression of the metal concentration (MeC) versus total length (TL) and age (duration of exposure), and (ii) correlation of the incorporation rate (IR=MeC/TL) with age. Metal incorporation rates (IR), i.e. a kinetic proxy for absorption during growth up to attainment of asymptotic length, decrease with age, reflecting a slow-down in metal absorption. This pattern mitigates the high initial concentrations observed for juveniles.
authors.affiliation: Departamento de Geoquímica, Instituto de Química, Universidade Federa Fluminense, Niterói, RJ 24020-150, Brazil. Electronic address: ju_0812@hotmail.com.
authors.forename: Juliana Ribeiro
authors.initials: JR
authors.lastname: Nascimento
authors.affiliation: Departamento de Geoquímica, Instituto de Química, Universidade Federa Fluminense, Niterói, RJ 24020-150, Brazil. Electronic address: esabadini@gmail.com.
authors.forename: Elisamara
authors.initials: E
authors.lastname: Sabadini-Santos
authors.affiliation: Departamento de Biologia Marinha, Instituto de Biologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil. Electronic address: carvalho.c89@gmail.com.
authors.forename: Cassia
authors.initials: C
authors.lastname: Carvalho
authors.affiliation: Departamento de Biologia Animal, Instituto de Ciencias Biologicas e da Saude, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ 23890-000, Brazil.
authors.forename: Karina Annes
authors.initials: KA
authors.lastname: Keunecke
authors.affiliation: Departamento de Geografia, Instituto de Geociências, CCMN, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-916, Brazil. Electronic address: geo_ricardocesar@yahoo.com.br.
authors.forename: Ricardo
authors.initials: R
authors.lastname: César
authors.affiliation: Departamento de Geoquímica, Instituto de Química, Universidade Federa Fluminense, Niterói, RJ 24020-150, Brazil. Electronic address: ebidone@yahoo.com.br.
authors.forename: Edison D
authors.initials: ED
authors.lastname: Bidone
mesh_terms: D000818:Animals; D001938:Brazil; D004305:Dose-Response Relationship, Drug; D004784:Environmental Monitoring / Q000379:methods*; D006801:Humans; D019216:Metals, Heavy / Q000032:analysis / Q000378:metabolism*; D033561:Penaeidae / Q000378:metabolism*; D015203:Reproducibility of Results; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism*
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical
keywords: AD(50) rate; Daily metal uptake; Human consumption risk; Incorporation rate curve; Probit analysis; Sepetiba Bay