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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/21653


Title: Artificial rearing of the freshwater snail Physa venustula   Gould for ecotoxicological studies of pesticides
Authors: Troncoso, Javier C.
Riquelme, Jorge S.
Laurie, Felipe G.
Abarca, Juan G.
Keywords: Physa   , artificial breeding, snail, laboratory conditions
Physa   , crianza artificial, caracol, condiciones de laboratorio
Issue Date: 31-Dec-2002
Publisher: Instituto de Investigaciones Agropecuarias, INIA
Citation: Agricultura Técnica (ISSN: 0365-2807) Vol 62 Num 2
Abstract: Standard artificial breeding of the freshwater snail Physa venustula   for ecotoxicological evaluation of pesticides was realized. The bioassays were standardized with a breeding protocol of four batches of P. venustula fed with a solution of Cereal Leaves plus fishmeal and Chlorella vulgaris   in our laboratory. The oviposition had a downward trend through the time. The eggs were hatched between 7 and 14 d under experimental conditions. The average of eggs per capsule was 12.04 ± 10.66 (range= 1 to 45) and the average fecundity percentage was 65.22%. The snails which produced more egg mass had a lower average number of eggs. The Cereal Leaves proved to be a more complete diet for the freshwater snail P. venustula compared to the microalgae Chlorella vulgaris . The morphologic characteristics of the eggs and the behavior of the immature forms are described. The rotifer Philodina acutiformis   was a biological contaminant that did not permit the normal growth of the eggs in the cultures. The protocol of ecotoxicological assay using P. venustula has the following advantages: wide distribution in the neotropic, reliability, repeatability, high sensitivity in comparison with other snails and short duration of the assay.
URI: http://hdl.handle.net/1807/21653
Other Identifiers: http://www.bioline.org.br/abstract?id=at02031
Rights: Copyright 2002 - Instituto de Investigaciones Agropecuarias, INIA (Chile)
Appears in Collections:Bioline International Legacy Collection

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