Height: Width of Limpets Across Different Zones with an Exposed Shore

 Height: Width of Limpets Across Different Zones on an Exposed Shore Essay

Rocky Coast Ecology: Holbeck Beach

This study was conducted to deduce perhaps the height to width proportion of limpets altered throughout the three key zones within the shore: upper, middle and lower. It absolutely was carried out on Holbeck Beach, North Yorkshire, where limpets were measured in all three zones employing random testing. We located a significant big difference in the elevation to size ratio between your upper and lower shore and higher and middle section shore. Due to the fact many factors, including the menace of desiccation and strong waves.

Limpet Patelle VulgataRocky ShoreEcologyHolbeck Beach front

Upper ShoreMiddle ShoreLower ShoreCallipers

QuadrentRandom SampleDesiccation


Prevalent limpets, Patella Vulgata, are found, on rocky shores, anywhere there is the firm enough for accessory on dirt, stones in addition to rock regularly. [1] The common limpet is often found on Holbeck shore in relatively excessive abundance. Patella vulgata will be in the taxonomic group gastropoda, and the relatives acmaeidae.

They are considerable on rugged shores of degrees of wave exposure but a high density of ocean weed makes it harder for the Patella Vulgata to attach itself towards the rocks, thus limpet thickness is lowered.[2] Patella Vulgata have the ability to employ their nasal mucus and their ‘foot' to clamp straight down upon the rock with considerable pressure. This allows these to remain properly attached at almost all times, inspite of strong influx action plus the threat of desiccation during low tide. When the limpet is fully clamped upon the mountain it is almost impossible to remove all of them.

The common limpet is a temperate species, and so is found largely across European countries, spread via Norway to Portugal. The grey cone-shaped shell of Patella Vulgata can reach a size of 6cm and level of 3cm with side rails radiating from your central apex. The physical foot in the limpet is usually a yellow colour and placed on the smooth home of it is shell.[3] Limpets graze after algae, which grows upon the stones where they live. They can scrape the algae using its radula (a tongue layered with many lines of teeth) because they slowly move across the rock surfaces.

The Patella Vulgata always go back to the same location, known as the homing scar, ahead of the tide withdraws. The shells grow to suit the conforms of the rock in order to contact form a strong seal off, protecting these people from desiccation and also predation. They find their way back to the same spot by making use of chemical cues, finding their own mucus observe and subsequent it back with their home level.[4]

Limpets are definitely the prey of your variety of creatures, including closes, fish, shore-birds, starfish and humans. The limpets have got two defences: fleeing or perhaps clamping into the mountain. They can identify which could be the most effective simply by detecting chemical substances in the environment.

Patella Vulgata have general lifespan of a decade but this is drastically transformed by the price of development. If there is an excessive amount of food, the limpets grow exceedingly quickly but generally simply live for approximately 3 years. Nevertheless , if foodstuff is sparse, limpets generally grow very slowly yet can meet 20 years. [5]

Patella Vulgata are hermaphrodites and experience a sex change throughout their life. In around being unfaithful months that they mature since males, nevertheless after a year or two they modify sex and be female. Spawning occurs each year, usually during the winter months since it is triggered by simply rough oceans, which spread out the ova and ejaculation.[6] The larvae has a pelagic life of around 2 weeks and after that settles on rocks for a covering length of about 0. 2 mm, usually in mountain pools or areas which can be constantly moist.


Our hypothesis states that there will be a difference in the height to width proportion of limpets on various areas of the beach: lower, middle and upper. The null hypothesis states that there will be simply no difference involving the height to width proportion of limpets on different parts of the beach: reduce, middle and upper.


We stopped at an subjected rocky banks at Scarborough in order to consider...

References: [1] – RG Evans (1974). Biology of British Limpets: Page 411. Found on doze. 10. 12.

[3] - Fish, J. D. & Fish, H. (1996) Students 's tips for the seashore. Second Release. Cambridge University Press, Cambridge. Found on 13. 10. doze

[4] – Website: pznow, Limpets

[5] - Slope, J. M., (2000). Patella vulgata. Common limpet. Marine creatures Information. Found on 17. 10. 12

[6] – BASSE CONSOMMATION (2005) Web page: BBC, Science and Nature, Animal Truth Files, Common Limpet

[8] – YPTE (2010). Internet site: ypte, Environment, Rocky Shore Ecology. Available on 15. twelve. 12.

[9] – Rothery M (2005) Rocky Banks Handout. Found on 20. 15. 12.

[11] – Norfolk WT (2011). Website: Norfolk Wildlife Trust, Wildlife, Prevalent Limpet. Available on 20. 10. 12.

[12] – T Adams (1999) " A Comparison of Thickness and Elevation of Common Limpets Among a Sheltered Shore and an Subjected Shore.. Found on 20. 15. 12.

[13] - Levinton J. S. (1995) Sea biology: function, biodiversity, ecology. Oxford College or university Press. Found on 22. 12. 12

[14] - Bennett, I

[15] – Battles (2011). Website: Limpet Battles, marine science. Found on twenty. 10. doze.

[16] - Knox G. A. (2001) The ecology of seashores. CRC Press. Page 557. Found on 20. 10. doze

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