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1

Swarm location in zooplankton as an anti-predator defence mechanism

Per Johan Jakobsen, Kjersti Birkeland, Geir Helge Johnsen

Journal:

Animal Behaviour

Year:

1994

File:

PDF, 195 KB

1994

2

The influence of predation on horizontal distribution of zooplankton species

PER JOHAN JAKOBSEN, GEIR HELGE JOHNSEN

Journal:

Freshwater Biology

Year:

1987

Language:

english

File:

PDF, 2.14 MB

english, 1987

3

The influence of food limitation on swarming behaviour in the waterflea Bosmina longispina

Per Johan Jakobsen, Geir Helge Johnsen

Journal:

Animal Behaviour

Year:

1988

Language:

english

File:

PDF, 366 KB

english, 1988

4

Size-specific protection against predation by fish in swarming waterfleas, Bosmina longispina

Per Johan Jakobsen, Geir Helge Johnsen

Journal:

Animal Behaviour

Year:

1988

Language:

english

File:

PDF, 352 KB

english, 1988

5

Increased Growth Rate in Atlantic Salmon Parr ( Salmo salar ) by Using a Two-Coloured Diet

Jakobsen, Per Johan, Johnsen, Geir Helge, Holm, Jens Christian

Journal:

Canadian Journal of Fisheries and Aquatic Sciences

Year:

1987

Language:

english

File:

PDF, 475 KB

english, 1987

6

A conservation plan for Atlantic salmon ( Salmo salar ) and anadromous brown trout ( Salmo trutta ) in a region with intensive industrial use of aquatic habitats, the Hardangerfjord, western Norway

Skaala, Øystein, Johnsen, Geir Helge, Lo, Håvard, Borgstrøm, Reidar, Wennevik, Vidar, Hansen, Michael Møller, Merz, Joseph E., Glover, Kevin A., Barlaup, Bjørn T.

Journal:

Marine Biology Research

Year:

2014

Language:

english

File:

PDF, 544 KB

english, 2014

7

The Relationship Between Aversive Conditioning and Risk-avoidance in Gambling

Geir Scott Brunborg, Bjørn Helge Johnsen, Ståle Pallesen, Helge Molde, Rune Aune Mentzoni, Helga Myrseth

Journal:

Journal of Gambling Studies

Year:

2010

Language:

english

File:

PDF, 269 KB

english, 2010

8

Psychological characteristics of elderly insomniacs

Ståle Pallesen, Inger Hilde Nordhus, Gerd Kvale, Odd E. Havik, Geir Høstmark Nielsen, Bjørn Helge Johnsen, Svein Skjøtskift, Linda Hjeltnes

Journal:

Scandinavian Journal of Psychology

Year:

2002

Language:

english

File:

PDF, 108 KB

english, 2002

9

Behavioural response of the water flea Daphnia pulex to a gradient in food concentration

Per Johan Jakobsen, Geir Helge Johnsen

Journal:

Animal Behaviour

Year:

1987

Language:

english

File:

PDF, 346 KB

english, 1987

10

Individual differences in evaluative conditioning and reinforcement sensitivity affect bet-sizes during gambling

Geir Scott Brunborg, Bjørn Helge Johnsen, Rune Aune Mentzoni, Helge Molde, Ståle Pallesen

Journal:

Personality and Individual Differences

Year:

2011

Language:

english

File:

PDF, 243 KB

english, 2011

11

Diminished aversive classical conditioning in pathological gamblers

Geir Scott Brunborg, Bjørn Helge Johnsen, Rune Aune Mentzoni, Helga Myrseth, Helge Molde, Ingjerd Meen Lorvik, Eli Torild Hellandsjø Bu, Ståle Pallesen

Journal:

Year:

2012

Language:

english

File:

PDF, 163 KB

english, 2012

12

The Influence of Alarm Substance on Feeding in Zebra Danio Fish (Brachydanio rerio)

Johan Jakobsen, Geir Helge Johnsen

Journal:

Year:

1989

Language:

english

File:

PDF, 170 KB

english, 1989

13

Temperature-dependent development of parthenogenetic embryos in Daphnia pulex de Geer

Gulbrandsen, Jon, Johnsen, Geir Helge

Journal:

Journal of Plankton Research

Year:

1990

Language:

english

File:

PDF, 579 KB

english, 1990

14

A morphological study of two populations of Bosmina longispina exposed to different predation

Johnsen, Geir Helge, Raddum, Gunnar Gihle

Journal:

Journal of Plankton Research

Year:

1987

Language:

english

File:

PDF, 598 KB

english, 1987

15

The Effect of Food Limitation on Vertical Migration in Daphnia longispina

Geir Helge Johnsen and Per Johan Jakobsen

Journal:

Limnology and Oceanography

Year:

1987

Language:

english

File:

PDF, 857 KB

english, 1987

16

Effects of Predation Risk and Parasitism on the Feeding Ecology, Habitat Use, and Abondance of Lacustrine Threespine Stickleback ( Gasterosteus aculeatus )

Jakobsen, Per Johan, Johnsen, Geir Helge, Larsson, Petter

Journal:

Canadian Journal of Fisheries and Aquatic Sciences

Year:

1988

Language:

english

File:

PDF, 858 KB

english, 1988

17

Functional response and food selection of the water flea, Bosmina longispina

Johnsen, Geir Helge, Børsheim, Knut Yngve

Journal:

Journal of Plankton Research

Year:

1988

Language:

english

File:

PDF, 348 KB

english, 1988

18

The effect of food limitation on vertical migration in Daphnia longispina

JOHNSEN, GEIR HELGE, JAKOBSEN, PER JOHAN

Journal:

Limnology and Oceanography

Year:

1987

Language:

english

File:

PDF, 910 KB

english, 1987

19

Dispersal and Survival of Juvenile Golden Eagles ( Aquila chrysaetos ) from Finnmark, Northern Norway

Nygård, Torgeir, Jacobsen, Karl-Otto, Johnsen, Trond Vidar, Systad, Geir Helge

Journal:

Journal of Raptor Research

Year:

2016

Language:

english

File:

PDF, 1.38 MB

english, 2016

20

Total inflammation in early protocol kidney graft biopsies does not predict progression of fibrosis at 1 year post-transplant

Dörje, Christina, Reisaeter, Anna Varberg, Dahle, Dag Olav, Mjøen, Geir, Midtvedt, Karsten, Holdaas, Hallvard, Flaa-Johnsen, Linda, Syversveen, Trygve, Hartmann, Anders, Jenssen, Trond, Scott, Helge,

Journal:

Clinical Transplantation

Year:

2016

Language:

english

File:

PDF, 248 KB

english, 2016

21

Effects of chronic dietary petroleum exposure on reproductive development in polar cod (Boreogadus saida)

Bender, Morgan Lizabeth, Frantzen, Marianne, Vieweg, Ireen, Falk-Petersen, Inger-Britt, Johnsen, Helge Kreutzer, Rudolfsen, Geir, Tollefsen, Knut Erik, Dubourg, Paul, Nahrgang, Jasmine

Journal:

Aquatic Toxicology

Year:

2016

Language:

english

File:

PDF, 2.07 MB

english, 2016