Final answer:
The 'Y. chest-bounding duel' likely refers to a dominance display by great apes, where the reward for the good fighter is the establishment of social dominance, leading to increased mating opportunities and resource control.
Step-by-step explanation:
The phrase 'Y. chest-bounding duel' is likely referring to a behavioral aspect of a particular animal species, where the 'Y' might stand for Y-chromosome, typically associated with males. This seems most relevant to the behaviors seen in great apes like chimpanzees or gorillas, where chest-bounding is a display of dominance and strength. In these duels or displays, the immediate reward is often establishing social dominance within the group, which can lead to increased mating opportunities and control over resources.
In the context of animals like gorillas or chimpanzees, the chest-bounding duels are more about social order than any tangible prize. The victor receives intangible rewards such as recognition, status, and the potential for leadership. Contributors to this outcome include the physical strength, the respect from other group members, and the attractiveness to potential mates, which can all significantly impact an individual’s fitness and ability to pass on their genes.