To hold its own in the struggle for existence, every species of animal must have a regular source of food, and if it happens to live on other animsl, its survival may be very delicately balanced. ... In any case, the survival of the tarantula species as a whole is protected by the fact that the spider is much more fertile than the wasp.
――慶応義塾大学 総合政策学部(2月17日実施)――94年