IMIS

A new integrated search interface will become available in the next phase of marineinfo.org.
For the time being, please use IMIS to search available data

 

[ report an error in this record ]basket (0): add | show Print this page
The elusive harbour porpoise exposed: strip transect counts off southwestern Ireland
Leopold, M.F.; Wolf, P.A.; van der Meer, J. (1992). The elusive harbour porpoise exposed: strip transect counts off southwestern Ireland. Neth. J. Sea Res. 29(4): 395-402
In: Netherlands Journal of Sea Research. Netherlands Institute for Sea Research (NIOZ): Groningen; Den Burg. ISSN 0077-7579; e-ISSN 1873-1406, more
Peer reviewed article  
Keyword
    Marine/Coastal
Authors  Top 
Abstract
    Harbour Porpoises Phocoena phocoena were counted along a 270-km-long transect around southwestern Ireland on 17 July 1989, a day with exceptionally favourable weather conditions. A total of 251 porpoises were seen in a 1000-m-wide counting strip. After adjusting for porpoise movement, a mean density (±SE) of 0.77±0.26 animals per km² was calculated for the continental shelf off SW Ireland. This allows the first provisional estimate to be made of the numbers of porpoises in the area. It is estimated that 19 210 (c.v. =0.34) animals were present in the shelf waters off SW Ireland, including 15% neonates.
All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy Top | Authors