Marine Biodiversity and Ecosystem Functioning
EU Network of Excellence

 
Main Menu

· Home
· Contacts
· Data Systems
· Documents
· FAQ
· Links
· MarBEF Open Archive
· Network Description
· Outreach
· Photo Gallery
· Quality Assurance
· Register of Resources
· Research Projects
· Rules and Guidelines
· Training
· Wiki
· Worldconference

 

Register of Resources (RoR)

 People  |  Datasets  |  Literature  |  Institutes  |  Projects 

[ report an error in this record ]basket (0): add | show Print this page

Monitoring seabirds on fixed ferry-routes: an evaluation
Seys, J.; Vantieghem, S.; Offringa, H.; Meire, P.; Kuijken, E. (2001). Monitoring seabirds on fixed ferry-routes: an evaluation, in: Seys, J. Het gebruik van zee- en kustvogelgegevens ter ondersteuning van het beleid en beheer van de Belgische kustwateren. pp. 68-77
In: Seys, J. (2001). Het gebruik van zee- en kustvogelgegevens ter ondersteuning van het beleid en beheer van de Belgische kustwateren. PhD Thesis. Universiteit Gent: Gent. 133 + LXIX appendices pp., more

Available in  Authors 
    VLIZ: Open Repository 134339 [ OMA ]

Keywords
    Aquatic organisms > Marine organisms > Aquatic birds > Marine birds
    Monitoring systems
    Shipping lanes
    ANE, Belgium [Marine Regions]
    Marine

Authors  Top 
  • Seys, J., more
  • Vantieghem, S.
  • Offringa, H.
  • Meire, P.
  • Kuijken, E.

Abstract
    An analysis of 71 ship-based seabird surveys on fixed ferry routes in the southernmost part of the North Sea revealed that parameters indicating the periodicity of counts (year, season, month) were more influential than those caused by unwanted side-effects (route, observer, wind). With the GLIM tool, we formed minimal adequate log-linear models of the densities of thirteen abundant species/taxa and quantified the impact of route, observer and wind. It was found that a relatively small shift in route (c. 15 km) resulted in significant differences in densities in half of the species. The difference could be as high as a factor 2.4-14.3 times more. Observer effects were considerable in auks (differences in densities of 1.5-3.2x), and really far out for several gull species. These differences might have been caused by slight changes in methodology and demonstrate clearly that interobserver differences need more attention. Finally the wind force affected the observed densities of Kittiwake and Common Gull in such a way that it is recommendable to avoid surveying at strong winds when surveys are part of a long-term monitoring programme. It is concluded that seabird counts on fixed ferry routes are a useful tool to monitor long-term changes in seabird abundance, provided the counting methods are further standardized and the analysis takes the most relevant side-effects into account (e.g. with GLIM).

All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy Top | Authors 


If any information here appears to be incorrect, please contact us
Back to Register of Resources
 
Quick links

MarBEF WIKI

Erasmus Mundus Master of Science in Marine Biodiversity and Conservation (EMBC)
Outreach

Science
Responsive Mode Programme (RMP) - Marie Nordstrom, copyright Aspden Rebecca

WoRMS
part of WoRMS logo

ERMS 2.0
Epinephelus marginatus Picture: JG Harmelin

EurOBIS

Geographic System

Datasets

 


Web site hosted and maintained by Flanders Marine Institute (VLIZ) - Contact data-at-marbef.org