海量图书期刊资源,随时随地畅享阅读乐趣
The influence of predation on horizontal distribution of zooplankton speciesPER JOHAN JAKOBSEN; GEIR HELGE JOHNSEN · 1987
Swarm location in zooplankton as an anti-predator defence mechanismPer Johan Jakobsen; Kjersti Birkeland; Geir Helge Johnsen · 1994
The Effect of Food Limitation on Vertical Migration in Daphnia longispinaGeir Helge Johnsen and Per Johan Jakobsen · Limnology and Oceanography · 1987
The effect of food limitation on vertical migration in Daphnia longispinaJOHNSEN, GEIR HELGE; JAKOBSEN, PER JOHAN · Limnology and Oceanography · 1987
Size-specific protection against predation by fish in swarming waterfleas, Bosmina longispinaPer Johan Jakobsen; Geir Helge Johnsen · 1988
Behavioural response of the water flea Daphnia pulex to a gradient in food concentrationPer Johan Jakobsen; Geir Helge Johnsen · 1987
Increased Growth Rate in Atlantic Salmon Parr ( <i>Salmo salar</i> ) by Using a Two-Coloured DietJakobsen, Per Johan; Johnsen, Geir Helge; Holm, Jens Christian · Canadian Journal of Fisheries and Aquatic Sciences · 1987