Vertical distribution, and seasonal and diurnal migration of Calanus helgolandicus in the Celtic Sea

1984 ◽  
Vol 79 (1) ◽  
pp. 63-73 ◽  
Author(s):  
R. Williams ◽  
D. V. P. Conway
1988 ◽  
Vol 58 (2) ◽  
pp. 227-258 ◽  
Author(s):  
J. Bleeker ◽  
S. van der Spoel

The medusa fauna of the mid North Atlantic Ocean between 24° and 55°N along approximately 30°W is studied. Two Hydromedusae new to science, Oceania tydemani and Annatiara lempersi, are described. The differences in fauna south and north of 42°N, and faunal borders near 50°, 48°, 45°, 35°, 30°, and 34°-37° N are discussed. The vertical distribution and for some species the diurnal migration and subtropical submergence are recorded.


Author(s):  
S.D. Batten ◽  
A.G. Hirst ◽  
J. Hunter ◽  
R.S. Lampitt

Zooplankton biomass varies on temporal, horizontal and vertical scales. However, data sets which incorporate all these dimensions at high resolution are very rare. Two devices which measure all these aspects have recently been simultaneously deployed in the Celtic Sea, the continuous plankton recorder (CPR) and the Longhurst–Hardy plankton recorder (LHPR). This demonstrates that integrated biomass derived from the LHPR are not significantly different from those derived using the CPR. Values have, therefore, been combined for the first time to describe the vertical distribution of mesozooplankton biomass at the Celtic Sea shelf edge through an annual cycle. This suggests that the surface biomass peak is broader at the shelf break than in the open ocean and in the autumn the main biomass peak may be below the depth sampled by the CPR.


Author(s):  
P. Foxton

This paper represents the second and final part of a study of the depth distribution and diurnal migration of pelagic decapod crustaceans in an area of the eastern North Atlantic. Part I (Foxton, 1970) dealt with the Caridea; Part II now considers the Penaeidea. In the discussion the data as a whole are analysed and the resulting patterns of vertical distribution and migration discussed.


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