1. To locate and sample spawning mackerel in the North Sea for stock separation studies.
2. To collect mackerel ovaries for fecundity studies. No early stage ovaries were found in any of the fish examined.
3. To obtain samples of whole mackerel for studies of stock separation by parasites for Dr McKenzie (Aberdeen).
4. To obtain mackerel tissue samples for Dr Jamieson's stock separation studies.
Peter D Wallace (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory)
Water bottle stations
Quantity: number of stations = 2
Biology and fisheries
Quantity: number of hauls = 20 Description: Portuguese High Headline