Thursday, March 16, 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 46, Number 3 / 2000
  Pages:  207 - 214
  URL:  Linking Options

BIOMETRIC DIFFERENCES BETWEEN AGE AND SEX CLASSES OF THE LEVANT SPARROW HAWK ACCIPITER BREVIPES ONMIGRATION AT EILAT, ISRAEL

REUVEN YOSEF A1, REUVEN YOSEF A2, LORENZO FORNASARI A3

A1 International Birding & Research Centre in Eilat, P.O. Box 774, Elat 88000, Israel
A2 Department of Life Sciences, Ben-Gurion University of the Negev, Be’er Sheva 84105, Israel
A3 Department of Environmental Sciences, II University of Milan “Bicocca”, Via Emanueli 15, I-20126 Milan, Italy

Abstract:

The Levant sparrow hawk (Accipiter brevipes) is a typical raptor with reversed sexual size dimorphism wherein the female is larger than the male. Here, we present the factors contributing to biometric differences between the age and sex classes. Starting from 1984, 1164 Levant sparrow hawks were captured and banded in the area immediately to the north of Elat, Israel. Comparing mean values, feather-dependent characters were 6.6–7.3% larger in adult females than in adult males, and 6.2–6.8% larger in second year females than in second year males. Differences were greater for culmen and hallux length and for body mass. We found wing cord and body mass to be the parameters most efficient in separating sex or age classes. Upon performing discriminant analyses on our data set, we found that hallux length varied independently between males and females, irrespective of the age of the bird. Our data establish that the Levant sparrow hawk is the least dimorphic of the European Accipiter species but has a sex-specific hallux size.


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.


   Add this item to your shopping cart for purchase later.


   Purchase this item now.


   Log in to verify access.



  


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: 209.128.119.47 • Server: MPWEB09
HTTP User Agent: Mozilla/5.0 (compatible; heritrix/1.6.0 +http://innovationblog.com)