Criterios sobre la crianza del caracol de jardín Cantereus Aspersus (Müller, 1774) y de la lombriz de tierra Eisenia Fetida (Savigny, 1826) para su uso en ecotoxicología terrestre con metales pesados.

The garden snail Cantareus aspersus (Müller, 1774) and the earthworm Eisenia fetida (Savigny, 1826) were reared under laboratory conditions in order to determine the appropriate criteria for their use in terrestrial ecotoxicology with the heavy metal, Pb (lead). Seven criteria established for the two bioindicators were detailed according to the management experience under laboratory conditions, which have allowed the garden snail (C. aspersus) and earthworm (E. fetida) to be properly raised. For this, the following criteria were considered: (1) preparation of the container, (2) physicochemical analysis of the soil, (3) temperature, photoperiod and relative humidity, (4) characterization, (5) cleanliness and hygiene (criterion not evaluated in earthworms). ground), (6) feeding and, finally (7) fecundity (criterion not evaluated in garden snails). The validation of the breeding criteria in the two bioindicators through exposure to Pb acetate showed various toxic effects at 14 days of exposure. In the case of the garden snail, there were deaths, color change, elimination of water and decrease in body mass. While in the earthworm deaths, cocoons and morphological changes were shown. It is suggested to continue optimizing the acclimatization and rearing conditions of both terrestrial indicators to evaluate various substances and potentially toxic elements to the soil. [ABSTRACT FROM AUTHOR]