Lecture 7 - Predation

Question 1

What is amensalism?

Answer 1

An interaction between 2 or more different species in which one is negatively impacted and the other is neither negatively nor positively impacted.

Question 2

Predation definition.

Answer 2

The consumption of one organism (the prey) by another organism (the predator) in which the prey is alive when the predator first attacks.

Question 3

How can a true predator be classified?

Answer 3

True predator:

• kill prey almost immediately
• usually eat whole organism
• eat several or many prey during lifetime
• usually applied to carnivores
  eg. lions, eagles, carnivore plants etc.

Question 4

How can a grazer be classified?

Answer 4

Grazers:

• usually do not kill prey
• consume part of the prey organism
• often attack large numbers of prey
• more herbivore grazers
  eg. sheep, cattle, locusts

Question 5

How can a parasite be classified?

Answer 5

Parasites:

• usually do not kill prey
• consume part of prey organism (host)
• attack one or small number of prey
• much smaller than prey
• host is habitat and food
• endo- or Ecto-
  eg. tapeworms, aphids, measles virus

Question 6

How can a parasitoid be classified?

Answer 6

Parasitoids:
- part of life cycle (subadult) is parasitic
 - usually kill prey eventually
 - consume all of the host organism
- attack one prey
- smaller than prey
 - host is habitat and food
 - endo- or Ecto-
eg.