JEB logo

Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP
About Journal
    Home
    Obituary: Dr. R. C. Dalela
    Editorial Board
    Reviewer Panel
    Publication Policies
    Guidelines for Editors
    Guidelines for Reviewers
    Abstracting and Indexing
    Subscription and Payments
    Contact Journal
    About Triveni Enterprises
 
Read Journal
    Current Issue
    Journal Archives
 
For Authors
    Guidelines for Authors
    Terms and Conditions
    Author Resources
    Fees and Payments
    Track Paper Status
 

Google Search the Journal web-site:


    Abstract - Issue Mar 2019, 40 (2)                                     Back


nstantaneous and historical temperature effects on a-pinene

Histological studies on ontogenic development of lymphoid organs in Indian major carp, Catla catla

 

Paper received: 06.03.2018??????????????????? Revised received: 07.06.2018??????????????????????????? Re-revised received: 04.07.2018????????????????? Accepted: 06.08.2018

 

 

Authors Info

P. Arya1,2, P.K. Pradhan1*,

R. Sharma2 and N. Sood1???

??

1ICAR-National Bureau of Fish Genetic Resources,

Lucknow-226 002, India

 

2Department of Biosciences, Integral University, Lucknow-226 026, India

 

    

 

*Corresponding Author Email :

pradhanpk1@gmail.com

 

 

 

Abstract

Aim: Immunostimulation, before the fish is able to mount an effective immune response, can induce tolerance. Therefore, present study was carried out to investigate the structural development of lymphoid organs, namely thymus, kidney and spleen of Indian major carp, Catla (Catla catla), which will help in deciding the appropriate age, when immunocompetence is established. ??? 

 

Methodology: In this study, ontogeny of the lymphoid organs of catla was studied from hatching up to 54 days post hatch (dph). For this, whole fish were fixed, processed and embedded in paraffin wax. Further, serial sections were cut, stained and observed under microscope.

 

Results: The thymus anlage appeared in the dorso-anterior part of the gill cavity at 1 dph. At 5 dph, an undifferentiated mass of stem cells was observed and by 8 dph, it appeared lymphoid. At 11 dph, clear dark and light zones of cells were observed. At 26 dph, Hassall?s corpuscles were observed and no further changes were observed except increase in number of lymphoid cells till end of the sampling period. Kidney was observed as an undifferentiated mass of stem cells at 1 dph with few renal tubules. At 5 dph, undifferentiated stem cells increased in number, and by 8 dph, few erythropoietic cells were observed. At 11 dph, lymphoid cells were present and by 17 dph, renal tubules started degenerating. At 26 dph, anterior kidney completely lacked excretory tissue and appeared lymphoid. Spleen was observed at 3 dph as an undifferentiated mass of stem cells, and at 8 dph, erythrocytes were seen. At 11 dph, spleen was heavily packed with erythrocytes, whereas at 20 dph, the number of erythrocytes decreased and lymphocytes were observed. Fully developed spleen was observed at 33 dph with presence of red and white pulp.

 

Interpretation: Thymus, head kidney and spleen were fully developed on 33 dph. The information generated in the present study would be helpful in deciding the appropriate age for vaccination.

 

Key words: Catla catla, Histology, Lymphoid organs, Ontogeny

 

 

 

Copyright ? 2019 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).