Sunday, October 22, 2006 Shopping Cart (2 Items)    Log Out  
 Online Journals
Online Journals Home
About Journals
Search
Browse
 Account
Account Home
Shopping Cart
Order History
Activate Access
Register
 Services
Services Home
Favorites
Alerting
ActiveSearch
 Support
Support Home
Contact Us
Downloads
Exports
  
Article Back To:  Main    Publication    Issue 

  

Israel Journal of Zoology
  Issue:  Volume 51, Number 3 / 2005
  Pages:  209 - 217
  URL:  Linking Options

SEASONAL BREEDING IN THE ITALIAN SPARROW: PLASMA ANDROGEN LEVELS AND SPERMATOGENESIS

DOMENICO FULGIONE A1, DANIELA RIPPA A1, MARIA FILOMENA CALIENDO, A1, MARIO MILONE A1

A1 Department of Biological Science, Section of Zoology, University of Naples Federico II, via Mezzocannone 8–80134 Naples, Italy

Abstract:

In this research we studied the spermatogenesis and circulating androgen levels in the male Italian sparrow. A seasonal pattern is shown, and evidence is provided that the Italian sparrow has multiple-clutch breeding activity. In particular, we have observed a winter resurgence of testicular activity, as indicated by active spermatogenesis and a relatively higher plasma androgen level as compared to the summer hormone levels. No breeding males were ever observed during the winter period, and an apparent resurgence of gametogenesis may simply be considered as a transient phenomenon. We suggest that multiple-clutch breeding activity and transient winter resurgence of spermatogenesis reflect the derivation of this species from an ancestral population, probably the progenitors of P. hispaniolensis, spread from Africa to the Italian peninsula.


The references of this article are secured to subscribers.


  
 Full Text Access
Full Text Secured

The full text of this article is secured to subscribers. To gain access, you may:

   Subscribe to this publication.

Subscribe

   Add this item to your shopping cart for purchase later.

Add to Shopping Cart

   Purchase this item now.

Purchase Item Now

   Log in to verify access.

Log In



  


For more information feel free to contact us:
E-Mail: laserpages@netmedia.net.il
Fax: 972-2-652-2277 Tel: 972-2-652-2226
Laser Pages
P.O. Box 35409
Jerusalem 91352, Israel
©2006 Laser Pages
All Rights Reserved.

Remote Address: 72.20.99.47 • Server: MPWEB09
HTTP User Agent: Mozilla/5.0 (compatible; heritrix/1.8.0 +http://www.accelobot.com)