IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

The effects of disturbance caused by boating on survival and behaviour of velvet scoter Melanitta fusca ducklings
Mikola, J.; Miettinen, M.; Lehikoinen, E.; Lehtilä, K. (1994). The effects of disturbance caused by boating on survival and behaviour of velvet scoter Melanitta fusca ducklings. Biol. Conserv. 67: 119-124
In: Biological Conservation. Elsevier: Barking. ISSN 0006-3207, more
Peer reviewed article  

Available in Authors 

Keywords

Authors  Top 
  • Mikola, J.
  • Miettinen, M.
  • Lehikoinen, E.
  • Lehtilä, K.

Abstract
    We studied the consequences of human disturbance and gull predation on brood survival of velvet scoter Melanitta fusca in the Archipelago of South-West Finland in 1990 and 1991. Each brood was exposed to disturbance by boats on average 8.5 times a day in 1990 and 3.5 times a day in 1991. Disturbance lengthened the swimming distances of ducklings and reduced the time used for feeding. Broods disturbed more frequently than average were smaller than those disturbed less frequently. At least 60% of ducklings died before the age of three weeks. The common predators of ducklings in the study area are the herring gull Larus argentatus and the great black-backed gull Larus marinus. The daily predation rate by gulls on velvet scoter ducklings was 4.7%, which means that 56% of ducklings are caught by gulls during the first three weeks. The frequency of gull attacks was 3.5 times higher in disturbed than in undisturbed situations.

All data in IMIS is subject to the VLIZ privacy policy Top | Authors