Question

2. SciSKILLS Calculate population size using mark-recapture data and understand the limitations of this technique What is population size if #of individuals marked in 1st catch of marked recaptures in 2nd catch total # of 2nd catch 50 5 40 N= 3. Identify the three main patterns of dispersion observed in nature Dispersion is the patterns of dispersion observed in nature Draw and label each type of dispersion 2 random 2 uniform? clumped Which dispersion pattern is: Most rare? Most common? Associated with clumped resources? Associated with competition or territoriality A relatively uniform distribution?

Answer 1

# of individuals marked in 1^st catch - 50

Uniform Clumped Random

# of individuals recaptured in 2^nd catch - 5

Total # of 2^nd catch - 40

N = (total # of 2^nd catch) x (# of individuals marked in 1^st catch) / # of individuals recaptured in 2^nd catch

Therefore, N = 40*50/5 = 400

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Most rare - random dispersion

Most common - clumped dispersion

Associated with clumped resources - random dispersion

Associated with competition or territoriality - Uniform dispersion

A relatively uniform distribution - clumped dispersion

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