Observations of copepod feeding and vertical distribution under natural turbulent conditions in the North Sea

2001 ◽  
Vol 138 (5) ◽  
pp. 1011-1019 ◽  
Author(s):  
A. W. Visser ◽  
H. Saito ◽  
E. Saiz ◽  
T. Kiørboe
Keyword(s):  
Vertical Distribution ◽  
North Sea ◽  
The North ◽  
The North Sea

scholarly journals Vertical distribution of pre-settled sandeel (Ammodytes marinus) in the North Sea in relation to size and environmental variables

2003 ◽  
Vol 60 (6) ◽  
pp. 1342-1351 ◽  
Author(s):  
Henrik Jensen ◽  
Peter J Wright ◽  
Peter Munk
Keyword(s):  
Vertical Distribution ◽  
Water Column ◽  
North Sea ◽  
Distribution Patterns ◽  
Food Concentration ◽  
The North ◽  
Vertical Distributions ◽  
The North Sea ◽  
Drift Trajectory ◽  
Vertical Positioning

Abstract Vertical distribution patterns of larval and juvenile sandeels were investigated at four locations in the North Sea. Sandeels between 6 and 65 mm were found to depths of 80 m, with vertical distributions dependent on both length and environmental factors. At one location with a stratified water column, the highest densities were found during the day in midwater where food concentration was also highest. In areas without marked vertical hydrographic gradients, larvae were relatively more abundant in surface waters during the day. At all locations, larvae of all sizes were generally more homogeneously distributed in the water column during night than during day. The extent of vertical migration, as measured by the standard deviation of the mean depth, increased generally with length. Gear avoidance was evident for larvae ≥20 mm. Catch efficiency generally depended on both length class and surface light intensity. A simulated drift pattern of larvae, based on ADCP current measurements from two locations, predicts that the horizontal drift trajectory would only be affected slightly by the vertical positioning of the larvae in the water column during the time of sampling. The implication of vertical migrations for dispersal of larvae away from the spawning grounds is discussed.

scholarly journals Horizontal and vertical distribution of meiofauna on sandy beaches of the North Sea (The Netherlands, Belgium, France)

2005 ◽  
Vol 59 (4) ◽  
pp. 255-264 ◽  
Author(s):  
Lech Kotwicki ◽  
Marleen De Troch ◽  
Barbara Urban-Malinga ◽  
Tom Gheskiere ◽  
Jan Marcin Węslawski
Keyword(s):  
The Netherlands ◽  
Vertical Distribution ◽  
North Sea ◽  
Sandy Beaches ◽  
The North ◽  
The North Sea ◽  
Horizontal And Vertical Distribution

Vertical distribution of biological aerosol particles above the North Sea

1998 ◽  
Vol 29 ◽  
pp. S771-S772 ◽  
Author(s):  
Sabine Gruber ◽  
Sabine Matthias-Maser ◽  
Jutta Brinkmann ◽  
Ruprecht Jaenicke
Keyword(s):  
Vertical Distribution ◽  
North Sea ◽  
Aerosol Particles ◽  
The North ◽  
The North Sea ◽  
Biological Aerosol Particles
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