fish constantly develops defenses against the parasite, while the parasite in turn evolves adaptations to cope with the specific defenses of its host. This tends to drive the speciation of more specialized species provided conditions remain relatively stable. This involves niche partitioning as new species are formed, and biodiversity is increased. A benefit of a specialist species is that because the species has a more clearly defined niche, this reduces competition from other species. On the other hand, generalist species, by their nature, cannot realize as much resources from one niche, but instead find resources from many. Because other species can also be generalists, there is more competition between species, reducing the amount of resources for all generalists in an ecosystem. Specialist herbivores can have morphological differences as compared to generalists that allow them to be more efficient at hunting a certain prey item, or able to eat a plant that generalists would be less tolerant of. Summary See also Cosmopolitan distribution Endemism Fitness landscape List of feeding behaviours References https://www.webpages.uidaho.edu/range556/appl_behave/projects/different_strokes.html Ecology