Home
http://www.virbac.fr/ http://www.boehringer-ingelheim.com/ http://www.novartis.com/ http://www.animalhealth.bayerhealthcare.com/
vetcontact
Vetrinär
Tiermedizin
  WELCOME  
vetcontact
Vetrinär
Tiermedizin
  Home  
  Login / Newsletter  
vetcontact
Vetrinär
Tiermedizin
  CONTACTS  
vetcontact
Vetrinär
Tiermedizin
  Classifieds  
  New Products  
  VetCompanies  
  VetSchools  
vetcontact
Vetrinär
Tiermedizin
  PROFESSION  
vetcontact
Vetrinär
Tiermedizin
  Edutainment  
  VetAgenda  
  Presentations  
  Posters  
  ESAVS  
  Specialisation  
vetcontact
Vetrinär
Tiermedizin
  INSIGHT  
vetcontact
Vetrinär
Tiermedizin
  Congress News  
  Picture Galleries  
vetcontact
Vetrinär
Tiermedizin
  PRODUCTS  
vetcontact
Vetrinär
Tiermedizin
  Bayer  
  Boehringer Ing.  
  Novartis  
  Virbac

 
  Simply book for less...  
    

Bovine    Equine    Small Animal Practice    Swine Practice    Articles    Vetjournal    
deutsch english español polski francais
Home / WELCOME / Archiv / Small Animal Practice /     
 
Predator mobbing in birds - new insights
Predator mobbing has been viewed as an adaptation to reduce the risk of predation. But factors influencing mobbing behaviour are still debated. This is a very interesting experimental study on two species of forest warblers for all colleagues with special interest in ethology!

We report on the results of an experiment with Dendroica caerulescens and Dendroica virens designed to determine (1) whether mobbing response by forest songbirds during the breeding season is restricted by territory boundaries, (2) the distance songbirds will move in response to anti-predator mobbing calls, and (3) whether reproductive status, age, and time of the breeding season determine the distance moved to mob.

We did not detect an effect of reproductive status, age, or time of breeding season on the distance moved by birds to mob.

All birds responded to the mobbing playback within their territory (defined by territorial defence in relation to specific song playbacks).

The maximum distance moved within a territory to engage in mobbing ranged from 25 to 175 m (= 72 ± 6 m).

Three of 37 birds responded to playbacks outside their territory boundaries.

In all three cases, maximum movement distances outside territories were short (25 m).

Thus, for two species of warblers, mobbing is highly constrained by territory boundaries during the breeding season.

This finding is congruent with arguments that mobbing is primarily a selfish behaviour, at least with respect to conspecifics.

Our results also provide support for the `move-on` hypothesis.


Source: Betts, Matthew G., Hadley, Adam S. & Doran, Patrick J. (2005): Avian Mobbing Response is Restricted by Territory Boundaries: Experimental Evidence from Two Species of Forest Warblers. In: Ethology 111 (9), 821-835.





Tell a friend   |   Print version   |   Send this article

SMALL ANIMAL PRACTICE

Novel radiation therapy for inoperable massive hepatocellular carcinoma members
If possible, surgical therapy is the therapy of choice in hepatocellular carcinomas. In the six dogs of this case series, the tumors were massive and inoperable. This study tried to evaluate the activity and tolerability of three-dimensional conformal radiation therapy (3D-CRT) in dogs with massive hepatocellular carcinoma.

  • Urinary tract infections in dogs with transitional cell carcinoma
  • Red blood cell storage lesion - an updatemembers
  • Coagulation abnormalities in dogs following severe acute traumamembers
  • Ultrasound-guided epidural access at the lumbo-sacral spacemembers
  • Thrombelastometry in dogs undergoing orthopedic surgerymembers
  • COX-2 inhibitors after phacoemulsification cataract removalmembers
  • First report of achromatopsia in related Labrador Retriever without CNGB3 mutations members
  • Acute kidney injury in severe sepsismembers
  • First description of orbital pneumatosis in a young catmembers
  • Serum antibodies to βA1-crystallin and cataract formation in Cocker spanielsmembers
  • Canine osteosarcoma cells and aurora kinase inhibitorsmembers
  • Long-term compassionate use of oclacitinib in dogs with allergic skin diseasemembers


  • [ Home ] [ About ] [ Contact / Request ][ Disclaimer ]

    Copyright © 2001-2013 VetContact GmbH
    All rights reserved