Parasite Definitions Flashcards
What is heterogenetic association?
A parasitic association rather than an offspring.
What is intimate association?
The parasite lives inside or outside the host’s body but is not a predator.
What is parasitic dependence?
The parasite uses host for metabolic or physiological purposes, so is not cohabitation.
What is foreign?
The host recognises parasite through its immune system.
What is the difference between a parasite and offspring?
Heterogenetic association
What is the difference between a parasite and a predator?
Intimate association
What is the difference between a parasite and cohabiting individual?
Metabolic/Physiological dependence
How is a parasite defined?
A heterogenetic association of an individual intimately associated with a host for metabolic or physiological dependence, and is recognised as foreign by the host and causes harm.
What is communalism?
Loose association with no metabolic dependence.
What is trophic interaction?
Example?
Neither cost nor benefit to either.
Ramora on Dolphins.
What is symbiosis?
Example?
Mutualism, where both benefit.
Lichen
What is parasitism?
Only parasite benefits with some degree of harm to the host.
What is an endoparasite?
Intestinal worms
What is an ectoparasite?
Fleas and lice
What is a microparasite?
Protists, bacteria, viruses.
What is an obligate parasite?
Always a parasite for at least one part of life cycle.
What is a facultative parasite?
Will be parasitic if opportunity arises.
What is a direct transmission cycle?
One host species, monogenetic.
What is an indirect transmission cycle?
More than one host species, digenetic.
What is a definitive host?
Host where parasite undergoes sexual reproduction.
What is an intermediate host?
Host where the parasite develops.
What is a vector?
Micropredator that actively delivers it to the next host.
What is a paratenic host?
A host that transports parasite, with no development or multiplication of the parasite.
What are 2 advantages to being parasitic?
Stable conditions and food freely available.
What are 3 disadvantages to being parasitic?
Finding a new host, finding development site in host, avoiding host defenses.
