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Sexual selection on mature male parr of masu salmon ( Oncorhynchus masou ): does sneaking behavior favor small body size and less-developed sexual characters?

Breeding BehaviorMature Male ParrAnimal BehaviourBehavioral SciencesFitnessSocial BehaviorEvolutionary BiologyEducationMasu SalmonSexual SelectionSex DifferenceSexual BehaviorAnimal Behavior