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note
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We thank the Saimaa Ringed Seal team at the WWF Finland for cooperation. This study was supported by the Academy of Finland, and computing power was provided by IBM Finland.
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10244244091
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First submitted 30 January 1995. Accepted for publication after revision 15 November 1995
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First submitted 30 January 1995. Accepted for publication after revision 15 November 1995.
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