dc.contributor.author | Helle, Kristin | |
dc.contributor.author | Bogstad, Bjarte | |
dc.contributor.author | Ottersen, Geir | |
dc.contributor.author | Pennington, Michael | |
dc.date.accessioned | 2007-07-17T09:38:55Z | |
dc.date.issued | 2000 | |
dc.identifier.uri | http://hdl.handle.net/11250/100451 | |
dc.description.abstract | A high growth rate for Arcto-Norwegian cod (Gadus morhua L.) in the Barents Sea and
adjacent areas from the larval stage to the 0-group stage enhances survival and ultimately
recruitment to the fishery. However, it appears that relatively high growth rates for a
cohort through the 0-group stage are not continued as the cohort ages. Based on survey
data, there is a negative, though not significant, correlation between a cohort’s average
length at the 0-group stage and its average length as 1 year olds and a significant negative
correlation between the average length at the 0-group stage and its average length at ages
2 through 9. It appears that the reason for this slowing of growth is that a strong inflow of
warm, prey-rich Atlantic water into the Barents Sea from the Norwegian Sea provides
favorable conditions for growth a”nl’d hence survival of the cod larvae and juveniles. But
this same strong inflow cakes a proportion of the cohort farther to the east in the Barents
Sea, where the bottom water is colder than in the west. Thus the young settled cod
experience colder conditions, which slows their growth, than those cohorts that have a
more westerly settlement, and this slow growth before age 2 appears to be the reason for
the cohort’s relatively smaller mean length at older ages. | en |
dc.format.extent | 234044 bytes | |
dc.format.mimetype | application/pdf | |
dc.language.iso | eng | en |
dc.publisher | ICES | en |
dc.relation.ispartofseries | ICES CM documents | en |
dc.relation.ispartofseries | 2000/Z:03 | en |
dc.subject | cod | en |
dc.subject | torsk | en |
dc.subject | environmental impact | en |
dc.subject | miljøpåvirkning | |
dc.title | Some environmental factors that influence the growth of Arcto-Norwegian cod from the early juvenile to the adult stage | en |
dc.type | Working paper | en |
dc.subject.nsi | VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 | |
dc.subject.nsi | VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 | |
dc.subject.nsi | VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 | |
dc.source.pagenumber | 10 s. | en |