module 6.2

Question 1

what is the graph of the predator functional responses?

Answer 1

Question 2

Question 3

Question 4

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Question 8

Question 9

Question 10

what are equilibrium conditions?

Answer 10

Question 11

what is the exploiter functional responses?

Answer 11

Question 12

what is prey switching?

Answer 12

there are several possible explanations for a sigmoidal type III response:
-availability of cover: the susceptibility of prey individuals will increase as the population grows and hiding places become filled
-search image: the ability of a predator to recognize a prey species will increase as the prey population size increases
-prey switching: the act of a predator turning to a more abundant alternate prey

Question 13

what is the predator numerical response?

Answer 13

-the ability of a predator population to regulate a prey population is related to the response of predators to increase in number in relation to prey
-predator populations grow slowly in comparison to those of their prey and dynamics lag that of prey

Question 14

what are equilibrium conditions?

Answer 14

Question 15

Question 16

Question 17

what is the predator total response?

Answer 17

predation rate, or the probability for a time interval that an individual prey will die of predation, relates to prey density via the total response
-the total response is the product of the functional and numerical response of the predator to prey density

Question 18

what is an example of predator total response?

Answer 18

if at density of 100 moose/1000km2 and over the course of year the capture rate is 1.5 moose/wolf (functional response), and there is an expected 10 wolves supported by 100 moose/1000km2 (numerical response), 15 moose are expected to die of predation in a year (1.5 moose x 10 wolves)
-the expected predation rate is 15 moose out of 100, or 15%

Question 19

Question 20

what is the predator total response and predator pit?

Answer 20

anything that makes it easier for predators to capture prey (ie: steepen the functional response, will steepen the predation rate)
-especially so at lower prey densities

this can lead to what is called a “predator pit”
-prey cannot escape from ow density due to increasing predation pressure

Question 21

what is the trend in bison population, Wood Buffalo National Park?

Answer 21