JEB logo

Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

About Journal
    Editor in Chief
    Editorial Board
    Reviewer Panel
    Publication Policies
    Guidelines for Editors
    Guidelines for Reviewers
    Abstracting and Indexing
    Subscription and Payments
    Contact Journal
Read Journal
    Current Issue
    Journal Archives
For Authors
    Guidelines for Authors
    Terms and Conditions
    Fees and Payments
    Track Paper Status
    JEB Awards

Google Search the Journal web-site:

    Abstract - Issue May 2008, 29 (3)                                     Back

Effect of photoperiod on the adrenal activities of male rose

ringed parakeet, Psittacala krameri

Ashok Kumar*1, Bipin Kumar2 and M.P. Arora2

1Department of Zoology, Institute of Basic Sciences,Bundelkhand University, Jhansi - 284 128, India

2Department of Zoology, M.M.H. College, Ghaziabad - 201 001, India

(Received: February 22, 2006; Revised received: September 22, 2006; Re-revised received: May 02, 2007; Accepted: August 12, 2006)

Abstract: Adult male rose ringed parakeets were exposed to very long photoperiod (22 hr L: 2 hr D) and very short photoperiod (2 hr L: 22 hr D) daily for 60 days during different phases of the annual testicular cycle. Adrenal activities of the experimental birds were compared with that of parallel held natural photoperiodic birds. Marked atrophy of adrenocortical cells was noted in the glands of long photoperiod (22 hr L:2 hr D) during different phases i.e. post-breeding, quiescent and pre-breeding phases of annual gonadal cycle. The atrophied cells were not uniformly distributed in different groups of long photoperiod responsive birds. During pre-breeding, post-breeding and quiescent phases marked atrophy of the adrenocortical cells were restricted to the sub capsular zone of the gland. The cytometric and karyometric studies also revealed significant decrease in the cortical cord width and diameter of nuclei in the cortical cells in either subcapsular zone in the gland of long photoperiodic birds considered for treatment during pre-breeding, post-breeding and quiescent phase or in both the sub capsular zone and the inner zone. The cytometric and karyometric values did not show any change from control birds.

Key words:†† Birds, Photoperiod, Gonadal activities, Microtomy, Adrenocortical tissues, Seasonal changes

PDF of full length paper is available with author (


Copyright © 2008 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).