A large proportion of parasite species are threatened by extinction.

In the north-western Black Sea this fish has 13 parasite species.

Even vets have started to argue about the conservational values of parasite species.

A major threat to the lake whitefish is an invasive parasite species, the sea lamprey.

If all the victims can find cover, the parasite species will not have enough food and will die off.

The Australian swellshark serves as a host to a number of parasite species, but these are poorly documented.

Interactions can have either positive or negative effects on each of the coinfecting parasite species.

Obviously, the large size of these trees is a factor in the number of parasite species.

The time required for development in the mosquito ranges from 10 to 28 days, depending on the parasite species and the temperature.

If the cicadas erupted every 14 years, for instance, they could be exploited by a parasite species with a 7-year life cycle.