Intraspecific competition is an interaction in population ecology, whereby members of the same species compete for limited resources. By contrast, interspecific competition occurs when members of different species compete for a shared resource.

Intraspecific competition occurs when two or more individuals of the same species simultaneously demand use of a limited resource (Wilson, 1975).

caudatum is 50% larger in size than P. aurelia, develop a hypothesis with your group to explain why interspecific competition has an effect on the relative population size of P. Group 4: Because it takes more resources to support an organism that is greater in size, the population size will be smaller than P.

Symbiosis is a close relationship between two species in which at least one species benefits. Mutualism is a symbiotic relationship in which both species benefit. Commensalism is a symbiotic relationship in which one species benefits while the other species is not affected.

Mutualism, a relationship in which both species benefit, is common in nature. In microbiology, there are many examples of mutualistic bacteria in the gut that aid digestion in both humans and animals. Commensalism is a relationship between species in which one benefits and the other is unaffected.

Mutualistic Relationships

• The bee and the flower. Bees fly from flower to flower gathering nectar, which they make into food, benefiting the bees.
• The spider crab and the algae.
• The bacteria and the human.

At the level of the community, predation reduces the number of individuals in the prey population. The best-known examples of predation involve carnivorous interactions, in which one animal consumes another. Think of wolves hunting moose, owls hunting mice, or shrews hunting worms and insects.

A predator is an organism that eats another organism. Some examples of predator and prey are lion and zebra, bear and fish, and fox and rabbit.

Parasitism is generally defined as a relationship between the two living species in which one organism is benefitted at the expense of the other. The organism that is benefitted is called the parasite, while the one that is harmed is called the host. A few examples of parasites are tapeworms, fleas, and barnacles.

10 signs that may mean you have a parasite Unexplained constipation, diarrhea, gas, bloating, nausea or other symptoms of Irritable Bowel Syndrome. You traveled internationally and got diarrhea on your trip. You have had food poisoning and your digestion has not been the same since.

This infection occurs after a person swallows tapeworm eggs. The larvae get into tissues such as muscle and brain, and form cysts there (these are called cysticerci). When cysts are found in the brain, the condition is called neurocysticercosis.

When you have an intestinal tapeworm infection, the tapeworm head adheres to the intestinal wall, and the proglottids grow and produce eggs. Adult tapeworms can live for up to 30 years in a host. Intestinal tapeworm infections are usually mild, with only one or two adult tapeworms.

Neurocysticercosis is caused by pork tapeworm larvae. Of all the worms that cause brain infections, the pork tapeworm causes by far the most cases of brain infections in the Western Hemisphere. After people eat food contaminated with the tapeworm’s eggs, secretions in the stomach cause the eggs to hatch into larvae.

Then, in 2018, doctors discovered a nearly 5-inch-long (12 centimeters) tapeworm in his brain. He was diagnosed with sparganosis, an infection caused by a type of tapeworm larvae known as Spirometra.

Once you consume them, they can move throughout your body – your eyes, your tissues and most commonly your brain. They leave doctors puzzled in their wake as they migrate and settle to feed on the body they’re invading; a classic parasite, but this one can get into your head.

There are several parasites in the environment and when they get into a person’s body, his/her health can be affected. Some parasites enter the body by way of contaminated food or water and some live on the skin and the hair. Examples of parasites include: stomach and gut worms (threadworm, hookworm)

Horsehair worms are harmless to vertebrates, because they can’t parasitize people, livestock, pets, or birds. They also don’t infect plants. If humans ingest the worms, they may encounter some mild discomfort of the intestinal tract, but infection never occurs.

Horsehair worms, part of the taxonomic phylum Nematomorpha, are parasitic worms that resemble long thin strands of hair (hence their nickname).

Several insect parasites can produce oozing skin eruptions and hair loss.