Browsing Brage IMR by Author "Thorsen, Anders"
Now showing items 1-20 of 52
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Assessment of Fish Spawning in the North Sea; Final Project Report of KINO-2, 2017–2021
Krafft, Bjørn Arne; Mateos-Rivera, Alejandro; Mozfar, Bahar; Skern-Mauritzen, Rasmus; Dahle, Geir; Sundby, Svein; Thorsen, Anders; Asplin, Lars; Wehde, Henning (Rapport fra havforskningen;2021 - 17, Research report, 2021)Increased and updated knowledge of reproductive strategies of fish is crucial to optimize the temporal and spatial planning for conducting seismic surveys; in order to reduce its potential negative ecosystems impacts. The ... -
Bio-physical properties of Norwegian coastal cod eggs
Jung, Kyung-Mi; Sundby, Svein; Thorsen, Anders; Folkvord, Arild; Kjesbu, Olav Sigurd (ICES CM documents;2009/C:11, Working paper, 2009)Vertical distribution of fish eggs and larvae is a key factor for transport and retention of the offspring, and for problems linked to mixing/separation between populations, and hence for mechanism maintaining genetic ... -
Comparison of visual and molecular taxonomic methods to identify ichthyoplankton in the North Sea
Mateos-Rivera, Alejandro; Skern-Mauritzen, Rasmus; Dahle, Geir; Sundby, Svein; Mozfar, Bahar; Thorsen, Anders; Wehde, Henning; Krafft, Bjørn Arne (Peer reviewed; Journal article, 2020)The North Sea is an important spawning and nursery ground for many demersal and pelagic fishes whose spawning areas are largely overlapping in time and space. This makes ichthyoplankton visual identification from the various ... -
Crude oil exposures reveal roles for intracellular calcium cycling in haddock craniofacial and cardiac development
Sørhus, Elin; Incardona, John P.; Karlsen, Ørjan; Linbo, Tiffany; Sørensen, Lisbet; Nordtug, Trond; van der Meeren, Terje; Thorsen, Anders; Thorbjørnsen, Maja; Jentoft, Sissel; Edvardsen, Rolf; Meier, Sonnich (Journal article; Peer reviewed, 2016-08-10)Recent studies have shown that crude oil exposure affects cardiac development in fish by disrupting excitation-contraction (EC) coupling. We previously found that eggs of Atlantic haddock (Melanogrammus aeglefinus) bind ... -
Cruise report [20/7 - 17/8, 1997]
Monstad, Terje; Bjelland, Otte; Anthonypillai, Valentine; Gullaksen, Ole; Pedersen, Ronald; Sundt, Rolf C.; Thorsen, Anders ([Toktrapport/Havforskningsinstituttet];, Working paper, 1997-08-21) -
Demonstration of maternal effects of Atlantic cod: Combining the use of unique mesocosm and novel molecular techniques – A new EU-project
Svåsand, Terje; Ajiad, Adnan Mosa; Dahle, Geir; Jakobsen, Tore; Kjesbu, Olav Sigurd; Moksness, Erlend; Otterå, Håkon; Solemdal, Per; Thorsen, Anders (ICES CM documents, Working paper, 2000)One of the effects of fishing is a reduction in average age and size in exploited fish stocks, leading to an increasing proportion of recruit spawners in the stock. Current management practice assumes equal viability of ... -
Development of a new ‘ultrametric’ method for assessing spawning progression in female teleost serial spawners
Anderson, Kelli C.; Alix, Maud; Charitonidou, Katerina; Thorsen, Anders; Thorsheim, Grethe Beate; Ganias, Kostas; dos Santos Schmidt, Thassya Christina; Kjesbu, Olav Sigurd (Peer reviewed; Journal article, 2020) -
Effects of dietary arachidonic acid on the reproductive physiology of female Atlantic cod (Gadus morhua L.)
Norberg, Birgitta; Kleppe, Lene; Andersson, Eva; Thorsen, Anders; Rosenlund, Grethe; Hamre, Kristin (Peer reviewed; Journal article, 2017) -
Effects of dietary arachidonic acid on the reproductive physiology of female Atlantic cod (Gadus morhua L.)
Norberg, Birgitta; Kleppe, Lene; Andersson, Eva; Thorsen, Anders; Rosenlund, Grethe; Hamre, Kristin (Peer reviewed; Journal article, 2017) -
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, ... -
Er steril triploid torsk redninga for torskeoppdrett?
Otterå, Håkon; Thorsen, Anders; Taranger, Geir Lasse (Havforskningsnytt;Nr. 11 - 2011, Working paper, 2011)Oppdrett av torsk har dei siste åra møtt kraftig motvind på grunn av dårleg lønsemd og til dels dårleg omdøme grunna mykje røming. Samtidig har den biologiske føresetnaden for å lukkast med torskeoppdrett blitt betre år ... -
Estimation of potential and realised fecundity of fish
Thorsen, Anders; Kjesbu, Olav Sigurd; Witthames, Peter R. (ICES CM documents, Working paper, 2005) -
Evaluating the effectiveness of biological reference points in conserving reproductive potential
Marshall, C. Tara; Yaragina, Natalia A.; Thorsen, Anders (ICES CM documents, Working paper, 2001) -
Family differences on triploid induction, sexual maturation and its contribution to sea cage performance of Atlantic cod, Gadus morhua
Puvanendran, Velmurugu; Lein, Ingrid; Bangera, Rama; Mortensen, Atle; Thorsen, Anders (Journal article; Peer reviewed, 2019)Early maturation has been one of the biological bottlenecks of commercializing Atlantic cod culture. To overcome the bottleneck, production of sterile fish through triploidy and other molecular techniques have been suggested ... -
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 ... -
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 ... -
Fecundity and growth of Atlantic cod (Gadus morhua L.) along a latitudinal gradient
Thorsen, Anders; Witthames, Peter R.; Marteinsdottir, Gudrun; Nash, Richard D.M.; Kjesbu, Olav Sigurd (Journal article; Peer reviewed, 2010-05)Some fish species have wide distribution areas that span very different habitats. In this investigation we have studied Atlantic cod (Gadus morhua), which is an example of such a species, to demonstrate how this may have ... -
First thorough assessment of de novo oocyte recruitment in a teleost serial spawner, the Northeast Atlantic mackerel (Scomber scombrus) case
dos Santos Schmidt, Thassya C.; Thorsen, Anders; Slotte, Aril; Nøttestad, Leif; Kjesbu, Olav S. (Peer reviewed; Journal article, 2021)The understanding of teleost fecundity type (determinate or indeterminate) is essential when deciding which egg production method should be applied to ultimately estimate spawning stock biomass. The fecundity type is, ... -
Fluorolice - Final report for FHF project 901508
Skern-Mauritzen, Rasmus; Thompson, Cameron; Dalvin, Sussie; Thorsen, Anders; Bui, Samantha; Nordi, Gunnvør á; Bron, James E.; Fordyce, Mark (Rapport fra havforskningen;2021 - 30, Research report, 2021)Salmon lice ( Lepeophtheirus salmonis ) represent a substantial obstacle for the sustainability of salmon farming (Torrissen, et al. 2013; Vollset, et al. 2018). As such, there are many avenues of research that aim to ... -
Growth of wild and domesticated Atlantic cod Gadus morhua reared under semi-commercial conditions
Otterå, Håkon Magne; Heino, Mikko; Sørvik, Anne Grete Eide; Svåsand, Terje; Karlsen, Ørjan; Thorsen, Anders; Glover, Kevin (Journal article; Peer reviewed, 2018)Genetic interactions between farmed escapees and wild fish represent a challenge to environmentally sustainable aquaculture. Breeding programs for Atlantic cod Gadus morhua have been initiated; however, the genetic response ...