dc.contributor.author | Misund, Ole Arve | |
dc.date.accessioned | 2012-08-02T12:14:02Z | |
dc.date.available | 2012-08-02T12:14:02Z | |
dc.date.issued | 1988 | |
dc.identifier.citation | This report is not to be cited without prior reference to the author | no_NO |
dc.identifier.uri | http://hdl.handle.net/11250/104394 | |
dc.description.abstract | The swimming behaviour and horizontal dimensions of mackerel
schools have been quantified by use of a multibeam, true
motion sonar during purse seining in the Northern North Sea,
August 1986. The horizontal dimensions of the schools were
quite variable, but on average the schools were elliptical
shaped, about 1.8 times larger than wide. The average school
area was proportional to the biomass of the schools. The
horizontal swimming speed was on average about 3.5
bodylengths/s, but there were great variations in swimming
behaviour among the schools. The schools performed strong
avoidance of the vessel, and schools escaped capture in about
37 % of the purse seine sets. | no_NO |
dc.language.iso | eng | no_NO |
dc.publisher | ICES | no_NO |
dc.relation.ispartofseries | ICES CM Documents;1988/B:27 | |
dc.subject | purse seine | no_NO |
dc.subject | snurpenot | no_NO |
dc.subject | fish behaviour | no_NO |
dc.subject | fiskeatferd | no_NO |
dc.subject | sonar | no_NO |
dc.title | Sonar observations of schooling mackerel during purse seining | no_NO |
dc.type | Working paper | no_NO |
dc.subject.nsi | VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ethology: 485 | no_NO |
dc.subject.nsi | VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 | no_NO |
dc.source.pagenumber | 12 s. | no_NO |