atterns of distribution and accumulation of trace metals in Hysterothylacium sp. (Nematoda), Phyllodistomum sp. (Digenea) and in its fish host Hoplias malabaricus, from two neotropical rivers in southeastern Brazi

Autor(es)

Rosa Leite, Lucas Aparecido ^[1] ; Pedreira Filho, Walter dos Reis ^[2] ; de Azevedo, Rodney Kozlowiski ^[3] ; Abdallah, Vanessa Doro ^[3]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, Inst Biociencias, UNESP, Campus Botucatu, Sao Paulo - Brazil

^[2] Fundacao Jorge Duprat Seguranca & Med Trabalho FU, Ctr Tecn Nacl CTN, Minist Econ ME, Sao Paulo - Brazil

^[3] Ctr Univ CESMAC, Programa Posgrad Anal Sistemas Ambientais, Maceio, Alagoas - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Environmental Pollution; v. 277, MAY 15 2021.
• Citações Web of Science: 3

Resumo

Here we evaluated the potential for trace metal accumulation of two parasitic species, Hysterothylacium sp. (Nematoda) and Phyllodistomum sp. (Digenea), found parasitizing Hoplias malabaricus, a characiform fish also known as trahira, collected from two neotropical rivers, Jacare-Pepira and Jacare-Guacu, in southeastern Brazil. Fish were collected between July 2017 and July 2019, totaling 90 fish specimens analyzed, 45 from each river. From fish, we take samples of three different tissues: muscle, intestine and liver. Along with the parasite samples taken from fish hosts, tissue samples were analyzed by an Inductively Coupled Plasma Mass Spectrometer (ICP-MS) for obtaining the trace metal (Al, Cr, Mn, Fe, Ni, Cu, As, Cd e Pb) concentrations. All elements were found in statistically higher concentrations in the parasites, both nematodes and digeneans, than in the host tissues, but in comparison, was observed that Hysterothylacium sp. had higher concentrations than those obtained in Phyllodistomum sp. We also found that uninfected fish had statistically higher concentrations of metals than infected ones. And in those who are infected, the size of the parasitic infrapopulations correlated negatively with the concentrations of trace metals obtained in the hosts tissues, that is, the concentrations in fish showed a tendency to decrease as the parasitic infrapopulations increased, or vice versa. In addition, our results show that the influence of the parasitic infrapopulations on metal concentrations in the fish host is not affected in cases of mono-infection or co-infection. (C) 2020 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 16/21040-9 - Biodiversidade dos metazoários parasitos das espécies de peixes dominantes do reservatório da usina hidrelétrica de ibitinga e de seus dois principais afluentes, os rios jacaré-pepira e jacaré-guaçu, estado de são paulo, brasil.
• Beneficiário: Angela Mitie Otta Kinoshita
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 17/00566-5 - Parasitos de peixes como bioindicadores de acumulação de metais pesados nos rios Jacaré-Pepira e Jacaré-Guaçú, Bacia Hidrográfica do Tietê-Jacaré, estado de São Paulo, Brasil
• Beneficiário: Lucas Aparecido Rosa Leite
• Modalidade de apoio: Bolsas no Brasil - Doutorado