Blar i Articles på emneord "VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921"

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    • Dynamics of shallow-water juvenile flatfish nursery grounds: application of the self-thinning rule 

      Nash, Richard D.M.; Geffen, Audrey J.; Burrows, Michael T.; Gibson, Robin N. (Journal article; Peer reviewed, 2007-08-23)
      Annual development of density and mean weight of juvenile plaice Pleuronectes platessa was examined at 2 nursery grounds (Port Erin Bay, Isle of Man, Irish Sea and Admucknish Bay, Firth of Lorne, west coast of Scotland) ...

    • The ecology of recovery 

      Gårdmark, Anna; Enberg, Katja; Ripa, Jörgen; Laakso, Jouni; Kaitala, Veijo (Journal article; Peer reviewed, 2003-04-30)
      The current high rate of population declines and attempts to `manage' their recovery, call for a better understanding of recovery dynamics of populations. In many cases, recovery of a population may primarily be determined ...

    • Effect of Sub-Lethal Exposure to Ultraviolet Radiation on the Escape Performance of Atlantic Cod Larvae (Gadus morhua) 

      Fukunishi, Yuichi; Browman, Howard I.; Durif, Caroline M.F.; Bjelland, Reidun M.; Skiftesvik, Anne Berit (Journal article; Peer reviewed, 2012-04-19)
      The amount of ultraviolet (UV) radiation reaching the earth’s surface has increased due to depletion of the ozone layer. Several studies have reported that UV radiation reduces survival of fish larvae. However, indirect ...

    • Effects of Fishing Tourism in a Coastal Municipality: a Case Study from Risør, Norway 

      Moksness, Erlend; Gjøsæter, Jakob; Lagaillarde, Guillaume; Mikkelsen, Eirik; Olsen, Esben Moland; Sandersen, Håkan T.; Vølstad, Jon Helge (Journal article; Peer reviewed, 2011)
      Recreational fishing has become an important part of the Norwegian tourist industry. The coastal municipality of Risør, southern Norway, is considering further development of its marine fishing tourism to increase local ...

    • Egg buoyancy variability in local populations of Atlantic cod (Gadus morhua) 

      Jung, Kyung-Mi; Folkvord, Arild; Kjesbu, Olav Sigurd; Agnalt, Ann-Lisbeth; Thorsen, Anders; Sundby, Svein (Journal article; Peer reviewed, 2012-06-29)
      Previous studies have found strong evidences for Atlantic cod (Gadus morhua) egg retention in fjords, which are caused by the combination of vertical salinity structure, estuarine circulation, and egg specific gravity, ...

    • Egg distribution, bottom topography and small-scale cod population structure in a coastal marine system 

      Knutsen, Halvor; Olsen, Esben Moland; Ciannelli, Lorenzo; Espeland, Sigurd Heiberg; Knutsen, Jan Atle; Simonsen, Jan Henrik; Skreslet, Stig; Stenseth, Nils Christian (Journal article; Peer reviewed, 2007-03-12)
      Coastal marine species with pelagic egg and larval stages, such as the Atlantic cod Gadus morhua, can be structured into genetically distinct local populations on a surprisingly small geographic scale considering their ...

    • Environmental toxicology: Population modeling of cod larvae shows high sensitivity to loss of zooplankton prey 

      Stige, Leif Christian; Ottersen, Geir; Hjermann, Dag Ø.; Dalpadado, Padmini; Jensen, Louise K.; Stenseth, Nils Christian (Journal article; Peer reviewed, 2010-12-30)
      Two factors determine whether pollution is likely to affect a population indirectly through loss of prey: firstly, the sensitivity of the prey to the pollutants, and secondly, the sensitivity of the predator population to ...

    • Estimation of Pup Production of Hooded and Harp Seals in the Greenland Sea in 2007: Reducing Uncertainty Using Generalized Additive Models 

      Øigård, Tor Arne; Haug, Tore; Nilssen, Kjell Tormod; Salberg, Arnt-Børre (Journal article; Peer reviewed, 2010-02-11)
      The pup production of the Greenland Sea populations of hooded and harp seals were assessed in aerial surveys using two aircrafts for reconnaissance flights and photographic surveys along transects over the whelping areas ...

    • Evolution of growth in Gulf of St Lawrence cod? 

      Heino, Mikko; Baulier, Loïc; Boukal, David S.; Dunlop, Erin S.; Eliassen, Sigrunn; Enberg, Katja; Jørgensen, Christian; Varpe, Øystein (Journal article; Peer reviewed, 2008-06-22)
      Fishing is often size selective such that the likelihood of capture increases with body size. It has therefore been postulated that fishing could favour evolution of slower growth because smaller size would reduce exposure ...

    • Evolutionary principles and their practical application 

      Hendry, Andrew P.; Kinnison, Michael T.; Heino, Mikko; Day, Troy; Smith, Thomas B.; Fitt, Gary; Bergstrom, Carl T.; Oakeshott, John; Jørgensen, Peter S.; Zalucki, Myron P.; Gilchrist, George; Southerton, Simon; Sih, Andrew; Strauss, Sharon; Denison, Robert F.; Carroll, Scott P. (Journal article; Peer reviewed, 2011-02-17)
      Evolutionary principles are now routinely incorporated into medicine and agriculture. Examples include the design of treatments that slow the evolution of resistance by weeds, pests, and pathogens, and the design of breeding ...

    • Fate of Francisella noatunensis, a pathogen of Atlantic cod Gadus morhua, in blue mussels Mytilus edulis 

      Wangen, Ingvild H.; Karlsbakk, Egil; Einen, Ann Cathrine Bårdsgjære; Ottem, Karl; Nylund, Are; Mortensen, Stein H. (Journal article; Peer reviewed, 2012-02-17)
      Francisellosis, caused by the bacterium Francisella noatunensis, is one of the most severe diseases affecting farmed cod, and has caused great economic loss for the cod farming industry in Norway. We studied the fate of ...

    • The fate of vitellogenic follicles in experimentally monitored Atlantic cod Gadus morhua (L.): Application to stock assessment 

      Witthames, Peter R.; Thorsen, Anders; Kjesbu, Olav Sigurd (Journal article; Peer reviewed, 2010-05)
      In this paper we report on the fate of vitellogenic follicles (VF) as either alpha atretic follicles (αF) or post-ovulatory follicles (POFs) using histology and captive Atlantic cod (Gadus morhua) in three experiments. In ...

    • Fish harvesting, marine reserves, and distribution of individuals over space 

      Kaitala, Veijo; Enberg, Katja; Ranta, Esa (Journal article; Peer reviewed, 2004-08-05)
      We analysed exploitation of populations that are partly protected in a marine harvest refuge to prevent their over-harvesting in the remaining unprotected area. We carried out our analysis by introducing the model of ideal ...

    • Fishery for goldsinny wrasse (Ctenolabrus rupestris) (Labridae) with pots along the Norwegian Skagerrak coast 

      Gjøsæter, Jakob (Journal article; Peer reviewed, 2002-03)
      Goldsinny wrasse (Ctenolabrus rupestris) was captured in pots during the years 1994-98 in the area between Arendal and Homborsund, west of Grimstad, along the Norwegian Skagerrak coast. The pots, made of steel 1 x 1 cm ...

    • Flytter torsken? 

      Stiansen, Jan Erik; Johansen, Geir Odd; Kvamme, Cecilie; Mehl, Sigbjørn; Ådlandsvik, Bjørn; Hannesson, Rögnvaldur; Ekerhovd, Nils Arne (Journal article, 2009-10)

    • Genetic diversity within and among Atlantic cod (Gadus morhua) farmed in marine cages: a proof-of-concept study for the identification of escapees 

      Glover, Kevin A.; Dahle, Geir; Westgaard, Jon-Ivar; Johansen, Torild; Knutsen, Halvor; Jørstad, Knut Eirik (Journal article; Peer reviewed, 2010-03-23)
      This study presents a molecular genetic characterization of Atlantic cod reared in commercial marine farms. Samples consisted of approximately 47 fish collected from nine cages located on four farms throughout Norway. In ...

    • Genetic mixed-stock analysis of Atlantic herring populations in a mixed feeding area 

      Bekkevold, Dorte; Clausen, Lotte A. W.; Mariani, Stefano; André, Carl; Hatfield, Emma M. C.; Torstensen, Else; Ryman, Nils; Carvalho, Gary R.; Ruzzante, Daniel E. (Journal article; Peer reviewed, 2011-12-05)
      Determining spatio-temporal distributions of fish populations is of interest to marine ecology, in general, and to fisheries science in particular. Genetic mixed-stock analysis is routinely applied in several anadromous ...

    • Geographic variability of sardine dynamics in the Iberian Biscay region 

      Silva, Alexandra; Skagen, Dankert W.; Uriarte, A.; Massé, Jacques; Santos, M. B.; Marques, V.; Carrera, P.; Beillois, P.; Pestana, G.; Porteiro, C.; Stratoudakis, Y. (Journal article; Peer reviewed, 2009-04)
      The spatio-temporal variability in the distribution, demographic structure, recruitment, and mortality of sardine within the Iberian Biscay region is described using area-disaggregated data collected during acoustic surveys ...

    • Growth and mortality patterns evaluated from otolith microstructure in Atlantic cod Gadus morhua larvae reared on different feeding regimes in mesocosms 

      van der Meeren, Terje; Moksness, Erlend (Journal article; Peer reviewed, 2003-12-15)
      The objective of this work was to test the hypothesis that in a situation where predators are excluded growth and mortality rates of cod larvae should be independent. This was evaluated from distributions of otolith ...

    • Growth of Barents Sea capelin (Mallotus villosus) in relation to zooplankton abundance 

      Gjøsæter, Harald; Dalpadado, Padmini; Hassel, Arne (Journal article; Peer reviewed, 2002)
      Because capelin feed on zooplankton, the availability of the latter may be a limiting factor for capelin growth in at least some areas and at certain times. It was therefore hypothesized that a relationship exists between ...