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Changes in hormone levels in relation to breeding behavior in male bullfrogs (Rana catesbeiana) at the individual and population levels

Breeding BehaviorFertilityFitnessReproductive BiologyReproduction ResponseReproductive EndocrinologyMale BullfrogsPublic HealthAnimal PhysiologyReproductive SuccessHormone LevelsEndocrinologyBiologyNatural SciencesPhysiologyEvolutionary BiologyRana CatesbeianaAnimal BehaviorReproductive Hormone