The view that a wild species has value only because of its usefulness to humans would be termed an anthropocentric instrumental value.

Anthropocentric

A perspective or philosophy that considers human beings as the most significant entity of the universe and interprets or regards the world in terms of human values and experiences.

Instrumental Value

The value assigned to something based on its utility or ability to help achieve an end or a goal, rather than for its intrinsic value.

Wild Species

Plant and animal species that exist naturally in the wild, without human intervention.