In the case of a brown bear and a squirrel, the brown bear may prey on the squirrel, but they do not compete for the same resources. Brown bears are omnivorous and eat a variety of foods, including berries, fish, and small mammals. Squirrels are primarily herbivorous and eat nuts, seeds, and fruits. Therefore, they do not compete for the same food sources.
Additionally, brown bears and squirrels occupy different habitats. Brown bears typically live in forests or mountainous regions, while squirrels can be found in a variety of habitats, including forests, grasslands, and urban areas. Therefore, they do not compete for the same space.
In summary, a brown bear and a squirrel cannot have an interspecific competition and predatory-prey relationship simultaneously because they do not compete for the same resources or occupy the same habitat.