• norsk
    • English
  • English 
    • norsk
    • English
  • Login
View Item 
  •   Home
  • Havforskningsinstituttet
  • Published by IMR
  • Fisken og havet (1958- )
  • View Item
  •   Home
  • Havforskningsinstituttet
  • Published by IMR
  • Fisken og havet (1958- )
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Climate-fish relations in Norwegian waters

Stiansen, Jan Erik; Loeng, Harald; Svendsen, Einar; Pettersson, L.H.; Johannessen, Johnny A.; Furevik, Tore; Handegard, Nils Olav; Fredo, O.
Research report
Thumbnail
View/Open
fh_2002_12.pdf (1.501Mb)
URI
http://hdl.handle.net/11250/113319
Date
2002
Metadata
Show full item record
Collections
  • Fisken og havet (1958- ) [700]
Abstract
Climate variability and change in the Arctic and Sub-Arctic regions have become increasingly

important issues over the past few decades. The goal of the Arctic Climate Impact Assessment

(ACIA) is to evaluate and synthesize knowledge on climate variability, climate change, and

increased ultraviolet radiation and their consequences. Combined analysis of marine data

records based on field observations and satellite Earth observation data records are being

investigated in order to determine the relations between the variability in the marine physical

and biological environment. The increased availability of satellite Earth observation data

during the last 30 years have improved the role of use of these type of observations in the

assessment of longer term variation in marine ecosystems. This report is mainly based on

results from the FJOMP project (Fishery, Earth observation, Modeling and Prediction). The

goal of the FJOMP project is to elaborate the use of satellite based information about the

marine environment in the studies of the variability in the fish recmitment and stock

assessment.

The response of climate variation on the fish population is not well understood. In many

stocks knowledge of the relationship between larvae and recruits and between recmits and

spawning stock biomass is poor. Identifying which climate variables that have an impact on

the fish at its different life stages may improve the knowledge of these relationships.

Under the project FJOMP, a database, with the same name, with fishery and climate (mostly

satellite based) time series was established. At this stage more than 40 climate and more than

30 fishery time series are included in the database. This database serves as a platform for a

statistically approach in search for climate variables of importance for the fish populations.

The effect of climate variation on fish recmitment and stock status has been investigated. In

this study we have focused mainly on the relations between the ocean physical climatology

and the three species, North East Arctic cod, Norwegian spring spawning herring and Barents

Sea capelin. Climate and fishery time series in the FJOMP database have been systematically

correlated, also with time lag, in order to search for interesting relationships. Also, multiple

regression models have been used to further improve some of the most interesting correlations

found.

It is not the intent of this report to give deeper discussions on mechanisms and processes that

link the climate variability to the fish populations, but instead give a taste of what this kind of

linkage can give of contribution to the understanding of climatically effects on fishery

recruitment and fish population variation.

The results show that the North Atlantic Oscillation index (NAO) index and the sea surface

temperature (SST) in general are two important climate variables for fish recmitment

(however, they are not independent as NAO have a large impact on SST). Especially the NAO

index gives good relations to several recruitment parameters for North East Arctic cod, while

SST is more important for Barents Sea capelin and Norwegian spring spawning herring. In

addition sensible heat flux, ice cover and heat transport are other important climate variables,

which are related to the variability of the various fish classes and recruitment.

NORSK SAMMENDRAG:

Relasjoner mellom klimaparametere og fiskeriparametere har blitt undersøkt ved hjelp av FJOMPdatabasen

(fiskeri, jordobservasjon, modellering og prediksjon).

FJOMP-databasen inneholder fysiske- og fiskeriparametere relatert i de nordiske hav og Barentshavet.

Vesentlige deler av databasen er basert på havmiljøparametere avledet fra in-situ-målinger og

satellitt-jordobservasjoner. Korrelasjoner mellom fisk og klima er systematisk undersøkt, og flere I interessante koblinger er funnet. De mest interessante er presentert i denne rapporten.
Publisher
Havforskningsinstituttet
Series
Fisken og havet
2002-12

Contact Us | Send Feedback

Privacy policy
DSpace software copyright © 2002-2019  DuraSpace

Service from  Unit
 

 

Browse

ArchiveCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsDocument TypesJournalsThis CollectionBy Issue DateAuthorsTitlesSubjectsDocument TypesJournals

My Account

Login

Statistics

View Usage Statistics

Contact Us | Send Feedback

Privacy policy
DSpace software copyright © 2002-2019  DuraSpace

Service from  Unit