At the seminar held by the Tweed Foundation in Kelso on 14th December 2016, Dr Jens Christian Holst spoke about the management of marine ecosystems and why they should be an integral part of Atlantic Salmon stock management. He postulated that the large pelagic fish stocks in the NE Atlantic have led to overgrazing of the plankton resources with grave effects to all levels of the ecosystem and particularly with the long term trends in Tweed, and indeed all European, Salmon stocks. He believes that the continued low abundance of Salmon stocks in many parts of the North Atlantic, despite significant fishery reductions, strengthens the view that factors acting on survival in the first and second years at sea are constraining the abundance of Atlantic Salmon.
Jens Christian is a former senior scientist at the Institute of Marine Research, Bergen, Norway. His specialised working areas are research related to the the pelagic fish resources in the Norwegian Sea, in particular Herring and Salmon, but also Blue Whiting and Mackerel. Recently, his focus has been ecosystem dynamics and management of the pelagic resources. He has been the chairman of the International council for Exploration of the Sea’s Planning Group on Surveys on Pelagic Fish in the Norwegian Sea and was advisor for the Norwegian authorities in international fisheries negotiations.
This presentation can now been see on the Tweed Foundation’s YouTube page. It was recorded with amateur recording equipment and so the sound quality is very poor. However, the content of the presentation is very important and crucial to understanding what is happening to Tweed Salmon stocks.