Home           Contact us           FAQs           
 
   Journal Page   |   Aims & Scope   |   Author Guideline   |   Editorial Board   |   Search
    Abstract
2013 (Vol. 5, Issue: 02)
Article Information:

Evaluation of Response Patterns in Somatic and Otolith Features of Laboratory- Reared and Wild Clarias gariepinus Exposed to Industrial Effluent

Aina O. Adeogun, Taofeek A. Babatunde and Azubuike V. Chukwuka
Corresponding Author:  Aina O. Adeogun 

Key words:  Clarias gariepinus, condition factor, industrial effluents, otolith factor, paired fin factor, reliability index,
Vol. 5 , (02): 626-634
Submitted Accepted Published
May 24, 2012 June 29, 2012 January 11, 2013
Abstract:

This study was aimed at comparing the responses of somatic and otolith features in Clarias gariepinus under chronic exposure conditions to industrial effluents in the laboratory for 60 days and in the wild for 6 months. Fish were collected upstream and downstream bi-monthly from a river receiving composite mixtures of industrial effluent while laboratory-rearedC. gariepinus were exposed to the same effluent mixtures in 60 days static renewal/bioassay using concentrations of 6.11, 3.05 and 2.23%, respectively and control series. A total of 21 variables representing saggital otolith and somatic data from both wild and laboratory fish were subjected to factor analysis. For laboratory reared fish, PC 1 indexed as ‘otolith factor’, PC 2 indexed as ‘condition factor’ and PC 3 indexed as ‘paired fin factor’ accounted for 26.15, 19.01 and 12.55% of the total variance, respectively. For wild fish, otolith factor (PC 1) and condition factor (PC 2) accounted for 38.24 and 22.69% of the variance respectively. The first 3 components and the first 2 components for laboratory and wild fish accounted for more than 50% of total variance in data. Reliability index (Cronbach’s alpha (&alpha>0.70) showed that the ‘otolith factor’ had strong internal consistency and is reliable as a primary and viable index of stress for both laboratory and wild fish. The complementary role of condition factor in stress detection was also highlighted. The emergence of paired features (otolith, pectoral and pelvic fins) as sensitive parameters in toxicity responses may be an indication of the onset of asymmetry in these structures.
Abstract PDF HTML
  Cite this Reference:
Aina O. Adeogun, Taofeek A. Babatunde and Azubuike V. Chukwuka, 2013. Evaluation of Response Patterns in Somatic and Otolith Features of Laboratory- Reared and Wild Clarias gariepinus Exposed to Industrial Effluent.  Research Journal of Applied Sciences, Engineering and Technology, 5(02): 626-634.
    Advertise with us
 
ISSN (Online):  2040-7467
ISSN (Print):   2040-7459
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