A new study published in Proceedings of the Royal society B shows that between 18% and 55% of adult salmon in the Northeast Atlantic Ocean are lost to parasites each year. Scientists have long been puzzled by the fluctuating numbers of fish in the oceans. An international team of researchers, led by Martin Krkošek from the University of Otago, New Zealand, compared the survival of wild salmon that received parasite medication with those that did not. The authors conclude that parasites can have a significant impact on fisheries and conservation.
The Royal Society, 07/11/12. Read the article ‘Parasites have big impact on salmon‘.