Trans-Atlantic Study of Calanus: Generation pattern and switching along the Norwegian Midshelf.

The objective of this subtask of the Trans-Atlantic Study of Calanus (TASC) progamme was to describe the across shelf transport of Calanus along the shelf edge from More to Lofoten, and identify the physical and biological factors responsible for the switch from a two generation to an annual generation pattern along the Norwegian midshelf sector. The project visited the midshelf from More to Lofoten during three cruises each of 10 days duration with R.V. "Jan Mayen" in February, April, May and July in 1996.

On the cruises in 1996, the physical oceanography of the area will be detailed by CTD (including Fluoresence and Light measurements) and the current patterns were obtained by continuous records from ADCP. These provided input data to a well developed physical model already at hand at SINTEF (Slagstad, 1995). The vertical and horizontal distribution of life stages were compared between onshelf and deeper offshelf areas at selected sites from More to Lofoten.