Summary: Leereenheid 3 - Populaties

Read the summary and the most important questions on Leereenheid 3 - Populaties

• 5 Birth, death and movement

• 5.1 Introduction

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• What processes change the size of a population?

  Birth, death, immigration, emigration.

• 5.1.1 What is an individual?

• What is an unitary organism?

  • An organism for which it is clear what is meant by 1 individual.
  • Form and development is is predictable and determinate from the moment that sperm fuses with an egg. 
    

• What is a modular organism?

  • Modular organisms grow by the repeated production of modules.
    
  • Their structure and precise program of development are not predictable but indeterminate. 

• What is a genet?

  The genet (genetic individual) is the individual that starts life as a single-celled zygote and is considered dead only when all its component modules have died.

• What is a module?

  A module starts life as a multi-cellular outgrowth from another module.

• 5.1.2 Counting individuals, births and deaths

• Explain the mark and recapture technique.

    and 
  With:
  

  • N= population size to be estimated
    
  • M= number of individuals that were initially captured and tagged
    
  • n= number of members that were captured the 2nd time
  • m= number of members of this 2nd time captured population that are tagged. 

• 5.3.3 A classification of survivorship curves

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• Explain survivorship curve type I and give an example.

  In a type I curve, mortality is concentrated near the end of the maximum lifespan. Typical for humans, zoo animals and pets.

• 5.4 Dispersal and migration

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• What are the 3 generalized spatial patterns?

  Random, regular and aggregated.

• 5.4.2 The role of migration

• From where to where does migration take place?

  From regions where the food resource is declining to regions where it is abundant.

• 7 Predation, grazing and disease

• 7.1 Introduction

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• What is the true definition of a predator?

  A predator is an organism that consumes all or part of another living organism (its prey or host) thereby benefiting itself, but reducing the growth, fecundity or survival of its prey.