Jens-Otto Krakstad

Forsker
Telefon: 99627060
Avdeling: Havforskning i utviklingsland

Arbeidsområde

Jens-Otto Krakstad er fiskeribiolog ved CDCF. Fra 2000-2002 arbeidet han som erstatnings forsker ved Namibia sitt forskningsinstitutt NatMIRC. I den perioden var han involvert i bestandsberegning av Namibisk hestemakrell. Dette innebar å forberede forvaltningsråd for Fiskeridepartementet i Namibia, opprettholde forbindelsene med representanter for industrien, samt on-the-job opplæring av andre forskere og teknikere.

I dag har han sitt viktigste arbeidsfelt innenfor EAF-Nansen-programmet, og spesielt på marine ressursene langs vestkysten av Afrika. Han har deltatt som toktleder på mer enn 30 tokt med ulike formål langs kysten av Afrika (akustisk, swept area, økosystem og eksperimentelle undersøkelser) om bord RV Dr. Fridtjof Nansen og andre fartøy. Krakstad har som en del av sitt arbeid hatt flere oppdrag for FAO, samt deltatt og vært ansvarlig for ulike tidligere BENEFIT og BCC prosjekter, og deltatt i EU prosjektet 'FADIO'. Han er også ansvarlig for det bilaterale samarbeidet mellom Mauritius og Norge om støtte til den Mauritiske fiskerisektoren og var ansvarlig for det tidligere bilaterale fiskeri samarbeidet mellom Nicaragua og Norge.

Curriculum Vitae

Jens-Otto E. Krakstad

Privat address:Stekervika 15, 5353 Straume

Work Experience
1. 01/2003-dd  Senior Scientist at Centre for Development Cooperation in Fisheries, Institute of Marine Research

Experience:
Cruise leader on more than 30 cruises of various purposes along the coast of Africa onboard R.V. Dr. Fridtjof Nansen and other vessels.
Project leader for the bilateral fisheries cooperation between Sri Lanka and Norway
Project leader for the bilateral fisheries cooperation between Mauritius and Norway
Project leader for the former bilateral fisheries cooperation between Nicaragua and Norway
Consultancies for FAO on a number of projects

03/2000-12/2002 Replacement scientist at Ministry of Fisheries and Marine Resources. Swakopmund, Namibia, for Centre for Development Cooperation in Fisheries, IMR, Norway.

The work consisted mainly of assessment of the Namibian horse mackerel stock, involving extensive survey activities, using multi frequency acoustics, geo-statistical models and GIS tools. Participation in several national and international research programs with collaborators in SADC and Europe. Providing information to senior management at the Ministry of Fisheries and liaise with industry representatives, as well as on-the-job training of fellow scientists and technicians.

Publikasjoner

Faglige foredrag

2016

Recruitment studies in the coastal waters of Gabon, Republic of the Congo, and Angola in 2014 and 2016.

Jens-Otto Krakstad, Espen Bagøien
2014

Spatial dynamics of the bearded goby and its key fish predators off Namibia vary with climate and oxygen availability

Anne Gro Vea Salvanes, Chris H. Bartholomae, Dawit Yemane, Mark J. Gibbons, Paulus I. Kainge, Jens-Otto Krakstad, Mathieu Rouault, Arved Staby, Svein Sundby
2014

Spatial dynamics of the bearded goby and its key fish predators off Namibia varies with climate and oxygen availability

Svein Sundby, Anne Gro Vea Salvanes, Chris H. Bartholomae, Dawit Yemane, Mark J Gibbons, Paul Kainge, Jens-Otto Krakstad, Mathieu Rouault
2013

A framework for data flow from observations to advice – the development of a new, efficient data infrastructure at IMR

Nils Olav Handegard, Harald Gjøsæter, Geir Odd Johansen, Jens-Otto Krakstad, Sjur Ringheim-Lid, Helge Sagen, Trond Westgård, Geir Huse
2011

Remote environmental signals affect goby abundance on the hypoxic shelf of the northern Benguela: Anoxia tolerant fish thrive when oxygen levels decrease

Anne Gro Vea Salvanes, Chris H. Bartholomae, D.Y. Ghebrehiwet, M. Gibbons, Paulus I. Kainge, Jens-Otto Krakstad, M. Rouault, Arved Staby, Svein Sundby

Poster

2016

Pattern in distribution of the early life history stages of two mesopelagic species and the relative influence of different environmental variables

Arved Staby, Erling Kåre Stenevik, Jens-Otto Krakstad, Dawit Yemane, Janet C. Coetzee
2014

Anchovy and sardinella spawning as a response to physical forcing: Egg and larvae distributions off Senegal, Gambia and Guinea-Bissau

Espen Bagøien, Erling Kåre Stenevik, Marek Ostrowski, Fambaye Ngom Sow, Tor Magne Ensrud, Jens-Otto Krakstad
2011

Fish in northern benguela: Anoxia tolerant bearded goby thrive in low oxygen waters

Anne Gro Vea Salvanes, Chris H. Bartholomae, D.Y. Gheebrehiwet, M. Gibbons, Paulus I. Kainge, Jens-Otto Krakstad, MJ Rouault, Arved Staby, Svein Sundby
2004

Dusky dolphins (Lagenorhynchus obscurus): Fatty acid composition of their blubber and of their prey

Jens-Otto Krakstad, Ann-Kristin Halvorsen, Leif Nøttestad, Otto Grahl-Nielsen
2003

Why do dolphins jump?

Leif Nøttestad, Bjørn Erik Eversvik Axelsen, Jens-Otto Krakstad, Bjørn Berland, Filomena Vaz-Velho, Graca Bauleth D'Almeida, Helge Nøttestad
2003

Xenobalanus globicipitis (Crustacea: Cirripedia) on Dusky Dolphin (Lagenorynchus obscurus) Off Namibia: Hitchhiker’s Guide to the Seas

Bjørn Berland, Jens-Otto Krakstad, Leif Nøttestad, Bjørn Erik Eversvik Axelsen
2003

Why do dolphins jump?

Leif Nøttestad, B. E. Axelsen, Jens-Otto Krakstad, B Berland, F. Vaz-Velho, G Bauleth-D'Almeida, H. Nøttestad
2003

Dusky Dolphins (Lagenorhynchus obscurus): Fatty acid composition of their blubber and of their prey

Jens-Otto Krakstad, Ann-Kristin Halvorsen, Leif Nøttesstad, Otto Grahl-Nielsen, J.P. Roux, Bjørn Erik Axelsen, G.B. Almeida, F. Vaz-Velho
2003

Xenobalanus globicipitis (Crustacea: Cirripedia) on dusky dolphin (Lagenorhynhus obscurus) off SW Africa: Hitchhiker's guide to the seas

Bjørn Berland, Jens-Otto Krakstad, Leif Nøttestad, Bjørn E. Axelsen, F. Vaz-Velho, G Bauleth-D'Almeida

Vitenskapelige artikler (NVI)

2015

Spatial dynamics of the bearded goby and its key fish predators off Namibia vary with climate and oxygen availability

Anne Gro Vea Salvanes, Chris H. Bartholomae, Dawit Yemane, Mark J. Gibbons, Paul Kainge, Jens-Otto Krakstad, Mathieu Roault, Arved Staby, Svein Sundby
Fisheries Oceanography 24 p. 88-101
2014

Physical influence on biological production along the western shelf of Madagascar

Trond Pripp, Tor Gammelsrød, Jens-Otto Krakstad
Deep-sea research. Part II, Topical studies in oceanography 100 p. 174-183
2013

Reproductive biology of horse mackerel Trachurus capensis and Trachurus trecae in Namibia and Angola

Hilkka Opolili Ndahafa Ndjaula, Jens-Otto Krakstad, Olav Sigurd Kjesbu
African Journal of Marine Science 35 p. 141-150
2011

Three species of Parthenina (Chrysallidinae, Pyramidellidoidea) New to West Africa

Frøydis Lygre, Christoffer Schander, Jon Anders Kongsrud, Jens-Otto Krakstad
Journal of Conchology 40 p. 477-481
2011

Acoustic observations of dusky dolphins Lagenorhyncus obscurus hunting Cape horse mackerel Trachurus capensis off Namibia

Matteo Bernasconi, Leif Nøttestad, Bjørn Erik E Axelsen, Jens-Otto Krakstad
Marine Ecology Progress Series 429 p. 209-218
2010

Dusky dolphins Lagenorhynchus obscurus and Cape fur seals Arctocephalus pusillus pusillus: fatty acid composition of their blubber and prey species

Otto Grahl-Nielsen, Jens-Otto Krakstad, Leif Nøttestad, Bjørn Erik Axelsen
South African Journal of Marine Science 32 p. 187-196
2007

Overlap in utilization of juvenile Cape horse mackerel by Cape fur seals and the purse-seine fishery in Namibia

S Mecenero, LG Underhill, Jens-Otto Krakstad, SP Kirkman, JP Roux
South African Journal of Wildlife Research 37

Rapporter og avhandlinger

2016

Recruitment studies on Sardinella, Sardinella aurita and S. maderensis, in the coastal waters of Gabon and Republic of the Congo

Jens-Otto Krakstad, Øystein Skagseth, Espen Bagøien, Tor Magne Ensrud, Jan de Dieu Lewembe, Jean Samba, Domingas Nsaku
2016

Recruitment studies on Sardinella, Sardinella aurita and Sardinella maderensis, in the coastal waters of Gabon and Republic of the Congo. 24 May - 14 June 2016

Jens-Otto Krakstad, Øystein Skagseth, Espen Bagøien, Tor Magne Ensrud, Jan de Dieu Lewembe, Jean Samba, Domingas Nsaku
2014

Recruitment studies on Sardinella aurita and S. maderensis in the coastal waters of Gabon, Congo and Northern Angola 24. May - 14. June 2014

Jens-Otto Krakstad, Espen Bagøien, Tor Magne Ensrud, Jean de Dieu Lewmbe, Jean Samba, Antonio Miguel Andre
2014

Cruise report Dr. Fridtjof Nansen Myanmar Ecosystem Survey 13. November - 17 December 2013

Jens-Otto Krakstad, Kathrine Michalsen, Bjørn Arne Krafft, Espen Bagøien, Oddgeir Berg Alvheim, Tore Strømme
2013

Metadata Report on Cruises conducted with R/V Dr. Fridtjof Nansen 1993 - 2011

Ines Dias Bernardes, Jens-Otto Krakstad, Oddgeir Berg Alvheim, Hans Erstad
2012

Cruise report "Dr. Fridtjof Nensen, CCLME North West Africa Ecosystem Survey, Guinea-Morocco. 20 October-21 December 2011

Jens-Otto Krakstad, Kathrine Michalsen, Oddgeir Berg Alvheim, diana zaera, Espen Bagøien, Bjørn Arne Krafft, Eva García-Isarch, f ramil, k van waerebeek
2012

BCC Cruise Report: A Transboundary study of the pelagic fish stocks of Southern Angola and Northern Namibia, 22 September – 06 October 2012

Jens-Otto Krakstad, Aristóteles Amaro, Vaino Shigwedha
2012

CCLME North West Africa Ecosystem Survey: Guinea - Morocco, 05 May – 22 July 2012

Jens-Otto Krakstad, Kathrine Michalsen, Åge Sigurd Høines, Oddgeir Berg Alvheim, Diana Zaera-Perez, Magne Olsen, Ines Dias Bernardes, Espen Bagøien, Bjørn Arne Krafft, Ana Ramos, Eva García-Isarch, Eli Muñoz, Fran Ramil, Paul Robinson
2010

Investigation of the Ophiuroid fauna of continental shelf areas in the Gulf of Guinea

Øydis Alme, Christoffer Schander, Jon Anders Kongsrud, Jens-Otto Krakstad
2009

Investigation of crustaceans from shelf areas in the Gulf of Guinea with special emphasis on Brachyura

Cathrine Stabel Henriksen, Christoffer Schander, Jon Anders Kongsrud, Jens-Otto Krakstad
2009

Additions to the knowledge of Chrysallidinae and Turbonillidae (Mollusca, Gastropoda, Pyramidelloidea) in tropical West Africa

Frøydis Lygre, Christoffer Schander, Jon Anders Kongsrud, Jens-Otto Krakstad
1999

Fødevalg til 0-gruppe trosk (Gadus morhua L.) ved overgangen fra pelagisk til bentisk levesett i forhold til årsklassestyrke og habitat

Krakstad, Jens-Otto

Kapitler og bøker

2014

Growth and Mortality in Settled Atlantic Cod in Relation to Diet—Evidence for a Recruitment Mechanism

Tore Johannessen, Ingrid Synnøve Berthinussen, Jens-Otto Krakstad, Anders Fernø
p. 63-94
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