• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Predator Prey Simulation Lab Report

Extracts from this document...


Date: 22nd August, 2007 Lab #1: Predator-Prey Simulation ==> OBJECTIVE: To simulate predator prey interactions and record the numbers of predator and prey in their "ecosystem" and prepare a graph. ==> THEORY: In a stable ecosystem, the number of predators and the number of prey fluctuate, but remain relatively constant. Three factors can affect the cycling of predator and prey numbers: a) The reproductive rate of the prey b) The number of prey eaten by each predator c) The reproductive rate of the predator ==> HYPOTHESIS: Dependent Variable: No. of individuals (predators and preys) Independent Variable: Time (generations) It was hypothesized that predators increase when prey are abundant. Henceforth, preys are driven to low numbers by predation, and the predators decline, whereby the preys recover. Thus, the predator population is dependent on the prey population and this cycle keeps on repeating itself. ==> PROCEDURE: 1. Place 3 "prey" on the table. 2. Toss 1 predator onto the table (evenly dispersed) ...read more.


6. Again, number of prey doubles, if the predator didn't "capture" 3 prey, it died. But a new one moves in for the next round. Keep going, adding to the number of prey each round. 7. Eventually the predator will be able to capture enough prey to survive. The number of predators doubles. Add to the predator population by adding predator cards. Now when the predators are tossed, more than one will be tossed. Any "captured" prey should also be removed. 8. Continue to record the data through 20 generations. ==> RESULTS: => Data Table Generations 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th 15th 16th 17th 18th 19th 20th Number of Predators 1 1 1 1 2 2 1 1 1 1 2 2 3 1 1 2 1 1 2 1 Number of Prey 3 4 4 6 6 4 2 4 6 8 10 10 8 4 4 2 2 4 2 ...read more.


Hence, the predators and preys co-exist in the eco-system. Q. What inferences can you make based on this data? A. When the prey population rises, the predator population also keeps on increasing, as more predators survive by eating at least 3 preys each. However, as the predators increase in number, they start overfeeding on the preys, thus leading to a drop in the prey population. Once the prey population drops, the predator population drops due to lack of food. The cycle repeats indefinitely. From the graph, the one representing the prey population is a typical boom and bust graph, as once the prey population rises and reaches its peak, it suddenly drops, before building up again. On the other hand, the predator population is stable, even though the numbers remain low. ==> CITATION: The computerized graph was created with the help of the following website: * http://www.nces.ed.gov ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Biology section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related International Baccalaureate Biology essays

  1. Marked by a teacher

    Biology: Lab report Germination

    4 star(s)

    It is necessary because plants need photosynthesis to convert water and carbon dioxide into sugar, which is food for a plant. [3] Temperature Experiment Upon testing the variable of temperature, it has become clear that cress seeds germinate much more quickly in a warmer climate. My hypothesis was thus correct.

  2. Plant Tropism Lab

    In the experiment, it is found that plants respond to light stimuli by growing towards the light source. If one was to look at Charts 3.1 - 3.5, one would find that the bend degree to the right gets higher each day.

  1. Biology Industrial Melanism of Peppered Moth Lab

    light-coloured moths on light-coloured "tree bark" because of their ability to camouflage in those habits and therefore have higher survival rates from predators. As the opposite colour of moth from its habit dies off, natural selection will favour the moths that can camouflage to its surroundings.

  2. Bio lab - Oxygen Consumption in germinating and non-germinating seeds

    To prevent the KOH solution from having a contact with the seeds, the inside of the test tube/ vial should be coated with materials that could absorb the KOH solution. If the amount of KOH was too small, it would alter the data drastically.

  1. effect of microwave radiation on lentil seeds lab report

    Electromagnetic radiation is also produced in microwaves. Electromagnetic energy can often cause heat; therefore the seeds will be exposed to certain intensities of heat in the microwave. As the heat increases to the optimum temperature enzyme stimulation will occur; this is needed for a faster growing rate.

  2. Botany Lab Report

    This causes the poor quality of soil. The soil is usually wet. The plants have many broad, thick leaves which prevent sunlight from getting in the forest. Some plants (tallest plants) are under sunlight for long period of time and some don't get any sunlight which makes the great amount of diversity in rainforest.

  1. A report on an Ecosystem

    1x Trowel * 1x plastic bag * 1x Calculator Abiotic factor Measurement Air Temperature at ground level 27�C Air Temperature 1m above ground 29�C Soil Temperature 25�C Soil pH 7.3 Geographical Features The plot of land is in a semi-arid environment, with an ecosystem consisting of mostly low-level herbs with

  2. A Local Ecosystem, Patterns in Nature,Life on Earth,The Australian Biota ...

    studied Predator and prey population numbers are closely related and potentially unstable. If there is too much predation, the number the number in each prey population will decrease, or one or more prey species may disappear altogether. These changes are followed by a decrease in the predator population, or the predators will attack a different prey species.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work