On the Discovery News website is an article with the results of the most recent study by John Ford, Fisheries and Oceans Canada, and others on how the decline or increase in the salmon populations affect both Northern and Southern Residents. In particular, El Nino years have had the most dramatic effect on the residents.
The article can be viewed at http://dsc.discovery.com/news/2009/09/16/killer-whale-salmon.html
John Ford, with Kenneth Balcomb from the Center for Whale Research and two other colleagues, reported the findings this month in the online edition of the journal Biology Letters .
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