Which factors (limited space or overcrowding; limited food; Predators; parasite and diseased) tend to act in a density-dependent manner; Tony Sinclair (1989) many studies of density dependence in 51 populations of insects, 82 populations of large mammals, and 36 populations of small mammals and birds. Which of the following observation is most likely true?

a) Insects showed a wide variety of causes of density dependence and no one density-dependent factor was of overriding importance

b) The lesser the amount of available food, the greater the mortality of large mammals

c) Space and social interactions were more important for smaller mammals and birds, because they are more territorial

#Question id: 10688

#Section 2: Evolution

For two species A and B in competition, the carrying capacities, competition coefficients, per capita growth rate and population size are

KA = 1000           KB = 1200    α of B= 1     β of A= .5       rB= .5         r A= .3                

AN= 500                  BN= 200

According to the Lotka-Volterra model, what is growth rate of species A?

#Question id: 10689

#Section 2: Evolution

Which of the following is correct statement?

A) Body size of parasitoid is always greater than host but parasite usually smaller than host

B) Predator immediately kill their prey however parasitoid never kill their host

C) Intrinsic rate of parasite is faster than host but intrinsic rate of predator is slower than prey

D) Body association time between parasite and host is more than time association between predator and prey

#Question id: 10691

#Section 2: Evolution

Following some attributes of biological control agent of parasite

A) General adaptability to the environment.

B) High searching capacity for hosts.

C) K selected strategy

D) Low dispersal ability.

E) Minimal time lag effects in responding to changes in host numbers.

Following above attribute is not ideal for that biological agent?

#Question id: 10692

#Section 2: Evolution

#Question id: 10694

#Section 2: Evolution

Which of the following is characteristic of parasitoid/ predators?

a) consumer usually larger than resource

b) Consumer requires one host for complete development.

c) Habitat independent

d) Consumer takes long time to kill host

e) Consumer never kills their host

f) Host is free living

Which of the following is feature of parasitoid?

#Question id: 10695

#Section 2: Evolution

Consumer (+) and resource (-) interactions classified by the two factor

T- Duration or intimacy of the association between individuals

Kp- Probability that resource individuals will be killed

Which of the following some statement are correct?

A-  Value of T for Grazer is greater than parasite

B-  Value of Kp for predator is greater than parasite

C-  Value of Kp for parasite is greater than parasitoid

D-  Value of T for parasitoid is greater than predator