Recently Sonia Altizer and her colleagues have found that the monarch butterflie
ID: 180584 • Letter: R
Question
Recently Sonia Altizer and her colleagues have found that the monarch butterflies that travel the longest distances have the lowest levels of infection by a protozoan parasite, whereas the prevalence of these parasites is highest in the nonmigratory populations of the butterfly. They suggest that because badly infected individuals cannot reach distant destinations, migration has the beneficial effect of culling parasite carriers, which keeps the species healthier than it would be otherwise. According to this hypothesis, who benefits from the removal of infected monarchs? From a theoretical perspective, why does this matter?
Explanation / Answer
ANS:
According to this hypothesis Long -distance migrated Monarch butterflies is beneficial when compare with Short -distance migrated Monarch butterflies.
Hypothesis:
The hypothesis "Long -distance migration may help reduce infection disease risks for many animals species" presented by Sonia Altizer, can explains an unfairly blaming that humans infectious diseases are spread by migratory species. But in so many scientifically researches are showing opposite results. In many cases clearly identified humans activities in the environment conditions creating can increasing diseases in migratory species.
Monarch butterflies migrated to long distances. It migrates from eastern North America to central Mexico, where they spend the winter. The monarch butterflies that present in rest of the world can migrate shorter distances.
The work by Altizer shows in eastern North American Monarch butterflies population parasite prevalence is low and but in non-migrated species the parasite prevalence is high.
The virulence of parasite is low in long migrated butterflies and parasite virulence is high in short migrated monarch. It explains the monarchs contains high parasite virulent did not survive for long distance migration.
This suggest that because badly infected individuals cannot reach distant destinations, migration has the beneficial effect of culling parasite carriers, which keeps the species healthier than it would be otherwise.
So the migration only keeps monarch populations healthy.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.