Download PDF
Open Access
CC BY-NC-ND 4.0 · Journal of Morphological Sciences 2017; 34(03): 197-202
DOI: 10.4322/jms.105516
Original Article
Thieme Revinter Publicações Ltda Rio de Janeiro, Brazil

Histomorphometric changes in the gill of Clarias gariepinus exposed to acute concentrations of chlorpyrifos

Authors

  • J. O. Omirinde

    1   Department of Veterinary Anatomy, Faculty of Veterinary Medicine, University of Jos, P.M.B 2084 Jos, Plateau State Nigeria, Post code 930001, Plateau, Nigéria

  • B. S. Audu

    2   Applied Hydrobiology and Fisheries Unit, Department of Zoology, Faculty of Natural Sciences, University of Jos, P.M.B 2084 Jos, Plateau State Nigeria, Post code 930001, Plateau, Nigéria

  • O. M. Mohammed

    2   Applied Hydrobiology and Fisheries Unit, Department of Zoology, Faculty of Natural Sciences, University of Jos, P.M.B 2084 Jos, Plateau State Nigeria, Post code 930001, Plateau, Nigéria

  • I. J. Gosomji

    1   Department of Veterinary Anatomy, Faculty of Veterinary Medicine, University of Jos, P.M.B 2084 Jos, Plateau State Nigeria, Post code 930001, Plateau, Nigéria
Further Information

Publication History

27 August 2016

13 August 2017

Publication Date:
18 October 2018 (online)

 PDF Download Permissions and Reprints

Abstract

Introduction: Chlorpyrifos is an agrochemical pesticide of fame that is commonly used by farmers to control pests. This chemical may become harmful to fish when washed into waterways leading to aquatic environment. This study investigates the histo-morphometric changes in the gills of African Catfish Clarias gariepinus exposed to acute toxic concentrations of chlorpyrifos. Materials and Methods: Clarias gariepinus fingerlings (weight 7.28 ± 0.03g and length 4.82 ± 0.06cm) were exposed to grades of (6.25, 12.5, 25, 50 and 100 pml/L) chlorpyrifos in solution. The 96 hour LC50 value of chlorpyrifos was found to be 160 pml/L. Results: The grades of chlorpyrifos induced several gill histo-architectural damages such as: moderate to severe gill epithelia sloughing, primary and secondary lamellar hyperplasia and central veinous congestion in the parenchyma with pronounced severity in fish exposed to higher concentrations. Similarly, the gill morphometrics (secondary lamellar length, width, interlamellar distance and surface area) were markedly altered by the graded concentrations of chlorpyrifos. Conclusion: Chlorpyrifos appears to be very toxic to ish and therefore, its use near ish farms or in areas close to aquatic environments should be discouraged.

Keywords

chlorpyrifos - Clarias gariepinus - histomorphometrics - histoarchitecture - gill