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- Title
PRUEBAS DE TOXICIDAD CON ELUTRIADOS DE SEDIMENTO MARINO DE LAS BAHÍAS LOS CHIMUS, TORTUGAS Y CASMA EN PERÚ EMPLEANDO LAS MICROALGAS Isochrysis galbana Y Nannochloropsis oceanica.
- Authors
López, Haydeé; Cristina Miglio, María; Paredes, Christian
- Abstract
Toxicity tests were carried out on marine sediment elutriates from Los Chimus, Tortugas, and Casma bays in Peru, using the marine microalgae Isochrysis galbana and Nannochloropsis oceanica. The marine sediment samples were collected in the months of March and August 2016. These toxicity tests were performed following standardized protocols, using static tests at 96 h of exposure. Previously, the sensitivity of both strains of microalgae was determined using copper sulfate (CuSO4·5H2O) as a reference substance. The mean Inhibition Concentration (IC50) obtained in this test showed that I. galbana was more sensitive than N. oceanica. Marine sediment elutriates from the study areas showed different levels of toxicity, such as "non-toxicity" (IC50 = 90% - 100%), "moderate toxicity" (IC50 = 59% - 81%), and "high toxicity" (IC50 < 59%) when using the microalgae I. galbana; while, in the case of N. oceanica, only "non-toxicity" (IC50 = 90% - 100%) was found for the same sediment elutriate samples. These toxicity tests show that the I. galbana microalgae detects different levels of toxicity, which is why it could be used to environmentally evaluate marine sediment samples as a complement to chemical tests since the origin of toxicity is not discriminated.
- Subjects
PERU; MARINE sediments; TOXICITY testing; COPPER sulfate; SEDIMENT sampling; CHEMICAL testing
- Publication
Ecologia Aplicada, 2021, Vol 20, Issue 2, p169
- ISSN
1726-2216
- Publication type
Article
- DOI
10.21704/rea.v20i2.1807