Interactive effects of metal contamination and pathogenic organisms on the introduced marine bivalve Ruditapes philippinarum in European populations |
| |
Authors: | Ika Paul-Pont Xavier de Montaudouin Florence Jude Christine Paillard |
| |
Institution: | a Université Bordeaux 1, UMR 5805 CNRS, Station Marine d’Arcachon, place du Dr. Peyneau, Arcachon 33120, France b Université de Bretagne Occidentale—IUEM, LEMAR UMR 6539 CNRS, Place Nicolas Copernic, Technopôle Brest Iroise, 29280 Plouzané, France |
| |
Abstract: | In natural environment, marine organisms are concomitantly exposed to pollutants and multiple disease agents resulting in detrimental interactions. The present study evaluated interactive effects of metal contamination (cadmium) and pathogenic organisms (trematode parasites Himasthla elongata and pathogenic bacteria Vibrio tapetis) singularly and in combination on the bivalve Ruditapes philippinarum, an introduced species to Europe, under laboratory controlled conditions. After 7 days, metal bioaccumulation and pathogen load were analyzed as well as metallothionein (MT) response and hemocyte concentrations and activities. Results showed that infection by opportunistic pathogens affects metal accumulation, leading to maximal Cd accumulation in co-infected clams. Among stressors only V. tapetis induced significant effects on immune parameters whereas a particular interaction “trematode-bacteria” was shown on MT responses. Despite low trematode infection in agreement with the resistant status of R. philippinarum to these macroparasites, significant interaction with bacteria and metal occurred. Such results highlight the necessity of taking pathogens into account in ecotoxicological studies. |
| |
Keywords: | Manila clam Pathogens Cadmium Metallothionein Immune defense |
本文献已被 ScienceDirect 等数据库收录! |
|