INVESTIGADORES
LUQUET Carlos Marcelo
artículos
Título:
Histological and morphological alterations induced by copper exposure in Laeonereis acuta (Polychaeta, Nereididae)
Autor/es:
GERACITANO, L.A.; LUQUET, C.; MONSERRAT, J.M.; BIANCHINI, A.
Revista:
MARINE ENVIRONMENTAL RESEARCH
Editorial:
Elsevier
Referencias:
Año: 2004 vol. 58 p. 263 - 267
ISSN:
0141-1136
Resumen:
Laeonereis acuta (Polychaeta, Nereididae) was collected in an unpolluted (UP) and an
polluted (P) site at the Patos Lagoon estuary (Southern Brazil) and maintained under control
conditions (UPC and PC, respectively) or exposed to waterborne copper (UPCu and PCu; 500(Polychaeta, Nereididae) was collected in an unpolluted (UP) and an
polluted (P) site at the Patos Lagoon estuary (Southern Brazil) and maintained under control
conditions (UPC and PC, respectively) or exposed to waterborne copper (UPCu and PCu; 500
lg Cu/l), for 48 h. Four groups (aaUPC, aaPC, aaUPCu, and aaPCu) were also pre-exposed
for 48 h to ascorbic acid (aa; 0.1 mM) before copper exposure. Histological and morphological
alterations, as well as oxygen consumption changes were evaluated. Independently of the
sampling site and the pre-exposure to the ascorbic acid, morphological abnormalities were
evident in more than 80% of worms exposed to copper. Conspicuous histological changes
(coeloma obliteration, cuticle separation from the epidermis, and absence of dorsal vessel)
were also observed. In addition, PCu worms showed loss of the digestive epithelium and
coiling behavior. Similar oxygen consumption values were observed in control and copper
exposed worms.g Cu/l), for 48 h. Four groups (aaUPC, aaPC, aaUPCu, and aaPCu) were also pre-exposed
for 48 h to ascorbic acid (aa; 0.1 mM) before copper exposure. Histological and morphological
alterations, as well as oxygen consumption changes were evaluated. Independently of the
sampling site and the pre-exposure to the ascorbic acid, morphological abnormalities were
evident in more than 80% of worms exposed to copper. Conspicuous histological changes
(coeloma obliteration, cuticle separation from the epidermis, and absence of dorsal vessel)
were also observed. In addition, PCu worms showed loss of the digestive epithelium and
coiling behavior. Similar oxygen consumption values were observed in control and copper
exposed worms.