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 Mar 2014, 35 (2)                                                                                                             Back

nstantaneous and historical temperature effects on a-pinene

Quinalphos induced alteration in respiratory rate and food consumption of freshwater fish Cyprinus carpio


K. Muttappa, H.R.V. Reddy, Mridula Rajesh* and A. Padmanabha

Department of Aquatic Environment Management, College of Fisheries, Mangalore - 575 002, India

*Corresponding Author E-mail:




Publication Data

Paper received:

08 May 2012


Revised received:

03 August 2013



05 October 2013




Acute toxicity of commercial grade organophosphate insecticide, quinalphos (25% emulsified concentration) to common carp (Cyprinus carpio) was tested through bioassay. The acute toxicity of quinalphos to the fingerlings exposed for 96hr was found to be 2.75ppm. For sub lethal toxicity study, the fish were exposed to two concentration viz., 1/10th of LC50 (0.275 ppm) and 1/5th of LC50 (0.55 ppm) along with lethal concentration (2.75 ppm) as reference for 48 hr. The carps were under stress and mortality was insignificant in both sub lethal and lethal concentrations. However, considerable variation in respiration rate and food consumption rate was observed in both lethal and sublethal concentrations. The alteration observed in the physiological condition may be a consequence of impaired oxidative metabolism and elevated physiological stress by fish against quinalphos.



 Key words

Acute toxicity, Common carp, Food consumption, Quinalphos, Respiratory rate



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).