Abstract:Competitive interaction among individuals of a single population may result in the differentiation to two or more distinct life history tactics. For example, although they exhibit unimodal size distribution, male juveniles of salmonids differentiate into those going down to the ocean for growth and returning after several years to the natal stream for reproduction (migratory tactic) and those staying in the stream and reproducing for multiple years (resident tactic). In this study, we developed a simple mathem… Show more
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