JEB logo

Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

About Journal
    Editorial Board
    Reviewer Panel
    RnD Division
    Subscription Info
    Contact Journal
 
Read Journal
    Current Issue
    Journal Archives
 
For Authors
    Authoring Guidelines
    Publication Process
    Track Paper Status
 

Search the Journal web-site through Google:


        Abstract - Issue Jan 2014, 35 (1)                                                                                                             Back



nstantaneous and historical temperature effects on a-pinene

Sensitivity of Costa Rica?s native cladoceran Daphnia ambigua and Simocephalus serrulatus to the organophosphate pesticide ethoprophos

 

Mar?a Arias-Andr?s*, Freylan Mena Torres, Seiling Vargas and Karla Solano

Instituto Regional de Estudios en Sustancias T?xicas (IRET). Universidad Nacional de Costa Rica, Heredia, 86-3000, Costa Rica

*Corresponding Author E-mail: maria.arias.andres@una.cr

 

 

 

 

 Publication Data

Paper received:

29 March 2013

 

Revised received:

10 June 2013

 

Accepted:

05 September 2013

 

Abstract

 

The study of pesticide toxicity in aquatic environments is assessed with ecotoxicological tests and most research has been performed using species from temperate regions. In the present study, series of acute (48 hrs) toxicity tests to compare the sensibility of two indigenous cladocera of Costa Rica and two reference species were used in temperate regions to the organophosphate pesticide, Ethoprophos. Additionally, reproduction tests using S. serrulatus with sub lethal concentrations of ethoprophos and a control were assayed to check its sensitivity over a longer period exposure. The sensitivity of Costa Rica?s native species Daphnia ambigua (EC50 48 hr : 12.9 ? 3.0 μgl-1) and Simocephalus serrulatus (10.6 ? 2.1 μgl-1) to ethoprophos were higher (p<0.05) when compared to the exotic species Daphnia magna (289.8 ? 77.4 μgl-1), and were comparable to that of the more widely distributed species, Ceriodaphnia dubia (18.2 ? 5.2 μgl-1). No effect on S. serrulatus reproduction was observed at concentrations between 1 and 4 μgl-1. This study provides information that can be considered in the selection of species for ecosystem studies of pesticide toxicity in neotropical regions.

 

Key words

 

 

Ecotoxicology, Native cladocera, Pesticides, Tropics

 

 

Copyright ? 2014 Triveni Enterprises. All rights reserved. No part of the Journal can be reproduced in any form without prior permission. Responsibility regarding the authenticity of the data, and the acceptability of the conclusions enforced or derived, rest completely with the author(s).