dc.contributor.author | Jakobsen, Tore | |
dc.date.accessioned | 2012-09-26T14:09:38Z | |
dc.date.available | 2012-09-26T14:09:38Z | |
dc.date.issued | 1996 | |
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/11250/105574 | |
dc.description.abstract | The relationship between spawning stock biomass and recruitment in Atlantic cod stocks is
investigated by ranking the SSB values according to size and applying a moving average of
ten points. The resulting averages are plotted against the average recruitment produced by the
respective SSBs. The plot in most cases resembles a Beverton and Holt or Ricker type of
relationship, showing substantial reduction in mean recruitment at low levels of SSB even
though the relationship is not forced towards the origin. Applying a moving average of ten
years to the time series of data shows how SSB and recruitment relationships have developed.
For some stocks the apparent relationship might be explained by medium- or long-term
variation in the recruitment caused by environmental conditions. Considering all the available
data, there is nevertheless substantial evidence of reduced recruitment at low levels of SSB for
the cod. | no_NO |
dc.language.iso | eng | no_NO |
dc.publisher | ICES | no_NO |
dc.relation.ispartofseries | ICES CM Documents;1996/G:15 | |
dc.subject | atlantic cod | no_NO |
dc.subject | atlantisk torsk | no_NO |
dc.subject | spawning stock | no_NO |
dc.subject | gytebestand | no_NO |
dc.subject | recruitment | no_NO |
dc.subject | rekruttering | no_NO |
dc.title | The relationship between spawning stock and recruitment for Atlantic cod stocks | no_NO |
dc.type | Working paper | no_NO |
dc.subject.nsi | VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 | no_NO |
dc.subject.nsi | VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 | no_NO |
dc.source.pagenumber | 22 s. | no_NO |