The survey and effort data and the estimated proportion of seals from the total population in each sub-area. VanhataloJarno VetemaaMarkus HerreroAnnika AhoTeija TiilikainenRaisa 2014 <p>Empty gill net cells represent areas where we assume gill nets do not contribute to by-catch.</p><p>The survey and effort data and the estimated proportion of seals from the total population in each sub-area.</p>