T'Vareth-undisciplined cub, disobedient and subnormal whelp of an undesirable species.

When these messages have no effect, they order the One Point Fives to launch an armada to Earth to exterminate the undesirable species.

These sterilizations are, however, the best method of controlling wild dog populations without completely eliminating them, which would allow other undesirable species (monkeys, rats, etc.) to take their place.

The effects of these toxicants appear to have been similar to those induced by rotenone, an organic compound found in the roots of various Leguminosae and now used to remove undesirable species of fish from lakes and ponds.

Bighead carp are not always considered undesirable, invasive species where they are introduced outside their native range, and they continue to be stocked in some waterbodies to support commercial fisheries.

This can be achieved by altering the superficial characteristics of the cap to "encourage desirable species or discourage undesirable species."

Voracious predators, they are considered an "undesirable" species in many waters.

The capture of undesirable species is a recognized problem with all fishing methods and unites environmentalists, who do not want to see fish killed needlessly, and fishermen, who do not want to waste their time sorting marketable fish from their catch.

In the gradual process of families improving their immediate environment, useful tree and vine species were identified, protected and improved whilst undesirable species were eliminated.

The engineering consultants reported that, although a restored dam would improve habitat for panfish and block upstream movement of undesirable species such as carp, it would not provide effective flood control.