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An investigation into whether the size of limpets are affected by being on the sheltered or exposed side of Filey Brigg.

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Introduction

An investigation into whether the size of limpets are affected by being on the sheltered or exposed side of Filey Brigg

Introduction

I am conducting an investigation about limpets and how their sizes vary in different conditions. I have chosen Filey Brigg as the area where the experiment will be carried out. I will take random samples from each side of the Brigg (exposed and sheltered) and hope to find an explanation for why or why not there maybe a variation between either set of results.

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These photos where found on the internet using a search engine (google) from a website called www.filey photos.com

A limpet is a common name for marine gastropod animals having arched, non-spiralling shells with broad ventral openings. They use large muscles (foot) to cling on to the rocks, not suction. They also feed on marine vegetation especially algae. Limpet a common all over the coast

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Middle

The possible environmental key variables:

  • Force of wind
  • Power of waves
  • Amount of food
  • Changing tides
  • Amount of current

The variables I think are likely to affect the size of the limpets are:

  • Force of wind
  • Power of wind
  • Amount of food

My prediction

The strong force of wind and waves will affect the size and shape of the limpets on the exposed side as, as the limpets will need to have a shape that gives them an advantage to cling on to the rocks. For this environment the shape would be low with a wide base and large sloping height. On the sheltered side I believe that the shape would be taller and not as wide once again with a large sloping height.

The availability of food will cause the exposed side limpets to grow larger as I believe more water will come into contact with the exposed side as the waves

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Conclusion

Perpendicular height: for this I will place a pair of compasses from the rim directly up at a right angle until the point is level with the peak. I will then record this measurement on a piece of paper. Then I will repeat this 3 time to make sure all readings were accurate. I will carry out this exercise randomly 30 different limpets on the exposed side and on 30 random limpets on the sheltered side.

Width: I will measure the width by placing the points of the compass from one side of the limpet to the other making sure they go directly through the peak. Then I will record this measurement on paper. Then I will repeat this 3 times to make sure my initial results were accurate. I will carry this exercise out on 30 random limpets from the exposed side and 30 random limpets from the sheltered side.

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