Home           Contact us           FAQs           
 
   Journal Page   |   Aims & Scope   |   Author Guideline   |   Editorial Board   |   Search
    Abstract
2009 (Vol. 1, Issue: 2)
Article Information:

Toxicity and Behavioural Changes in Heterobranchus bidorsalis Fingerlings Treated with a Micronurient Fertilizer, Agrolyser

U.U. Gabriel, P. Mark and E.E. Orlu
Corresponding Author:  Gabriel U.U. 

Key words:  Opercular beat frequency, tail beat frequency, agrolyser, hybrid catfish, , ,
Vol. 1 , (2): Page No: 34-38
Submitted Accepted Published
2009 June, 10 2009 Sep., 02
Abstract:

Heterobranchus bidorsalis (mean total length, 2.940.34 cm SD; mean weight, 6.750.9 cm SD) was exposed in a daily renewal bioassay to different concentrations of agrolyser (0.00, 1400, 1600, 1800, 2000 and 2200mg/l), a micronutrient fertilizer for 96hrs to assess its toxicity. The opercular (obf), tail beat (obf) frequencies and mortality were monitored during the exposure period. The pattern of response of obf at the various concentrations of agrolyser varied very widely at the exposure duration. The tbf of the fish at the various exposure concentrations generally increased with time peaking at the 48th hour after which it began to decline. Mortality of exposed fish in all the exposure concentrations increased with duration of exposure. Exposed fish showed altered obf with exposure concentration (p<0.05) and time (p>0.05). Cumulative mortality and tbf differed with exposure time and concentrations of agrolyser (p<0.050). Median lethal time for the lowest concentration, 1400mg was 263.83hrs (181.41-667.75, C.L.) which was 2.5times that for the highest concentration. The 96hr lethal concentrations (LC50) at 72 and 96hrs w ere 2975.48mg (2594.50-3995.10 C.L.) and 2340.91mg/l (2175.63-2654.56 C.L.), respectively. Although the fish appeared to be tolerant to acute levels of agrolyser, alteration in the behaviour may affect a number of activities involved with the survival of the fish in the w ild and culture environment.
Abstract PDF HTML
  Cite this Reference:
U.U. Gabriel, P. Mark and E.E. Orlu, 2009. Toxicity and Behavioural Changes in Heterobranchus bidorsalis Fingerlings Treated with a Micronurient Fertilizer, Agrolyser.  Research Journal of Environmental and Earth Sciences, 1(2): Page No: 34-38.
    Advertise with us
 
ISSN (Online):  2041-0492
ISSN (Print):   2041-0484
Submit Manuscript
   Current Information
   Sales & Services
   Contact Information
  Executive Managing Editor
  Email: admin@maxwellsci.com
  Publishing Editor
  Email: support@maxwellsci.com
  Account Manager
  Email: faisalm@maxwellsci.com
  Journal Editor
  Email: admin@maxwellsci.com
  Press Department
  Email: press@maxwellsci.com
Home  |  Contact us  |  About us  |  Privacy Policy
Copyright © 2009. MAXWELL Science Publication, a division of MAXWELLl Scientific Organization. All rights reserved