SavedAdd your journal

Journals / Turkish Journal of Zoology / 2013 / Cilt: 37 - Sayı: 1

Shell size differences in Helix lucorum Linnaeus, 1758 (Mollusca: Gastropoda) between natural and urban environments

Levan MUMLADZE
Pages
1–6
Publication Date
2013-01-01
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

H. lucorum appears to adapt to anthropogenic pressures by changes in population dynamics, ceasing growth at a smaller size.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Helix lucorum Linnaeus, 1758 is a large helicid snail widespread in Georgia.
📊
Key Findings & Data:Morphometric studies were carried out on 12 populations from both anthropogenic and more natural habitats in a wide range of altitudes and climatic regimes in Georgia to investigate the effects of human pressure.
💡
Conclusion & Impact:H. lucorum appears to adapt to anthropogenic pressures by changes in population dynamics, ceasing growth at a smaller size.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Key words: Helix lucorum · shell · size

Abstract

Helix lucorum Linnaeus, 1758 is a large helicid snail widespread in Georgia. While its occurrences are mainly associated with human activity, it is frequently impacted by strong direct pressure, which could cause local extinctions of populations. Instead, H. lucorum populations in anthropogenic landscapes are usually dense and apparently well adapted. Morphometric studies were carried out on 12 populations from both anthropogenic and more natural habitats in a wide range of altitudes and climatic regimes in Georgia to investigate the effects of human pressure. Populations in more anthropogenic habitats have smaller adult shells independently of any effects of climate, altitude, or density. H. lucorum appears to adapt to anthropogenic pressures by changes in population dynamics, ceasing growth at a smaller size.

Özet

Helix lucorum Linnaeus, 1758 is a large helicid snail widespread in Georgia. While its occurrences are mainly associated with human activity, it is frequently impacted by strong direct pressure, which could cause local extinctions of populations. Instead, H. lucorum populations in anthropogenic landscapes are usually dense and apparently well adapted. Morphometric studies were carried out on 12 populations from both anthropogenic and more natural habitats in a wide range of altitudes and climatic regimes in Georgia to investigate the effects of human pressure. Populations in more anthropogenic habitats have smaller adult shells independently of any effects of climate, altitude, or density. H. lucorum appears to adapt to anthropogenic pressures by changes in population dynamics, ceasing growth at a smaller size.

🔖

Cite This Article

MUMLADZE, L. (2013). Shell size differences in Helix lucorum Linnaeus, 1758 (Mollusca: Gastropoda) between natural and urban environments. Turkish Journal of Zoology, Cilt: 37 - Sayı: 1, 1–6. https://ajindex.com/articles/177144

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (15)

  1. Bantock, C.R. and Bayley, J.A. 1973. Visual selection for shell size in Cepaea (Held.). J. Anim. Ecol. 42: 247–261.
  2. Baur, B. 1984. Shell size and growth rate differences for alpine populations of Arianta arbustorum (L.) (Pulmonata: Helicidae). Rev. Suisse Zool. 91: 37–46.
  3. Baur, B. 1988. Microgeographical variation in shell size of the land snail Chondrina clienta. Biol. J. Linn. Soc. 35: 247–259.
  4. Cameron, R.A.D. and Carter, M.A. 1979. Intra- and interspecific effects of population density on growth and activity in some helicid land snails (Gastropoda: Pulmonata). J. Anim. Ecol. 48: 237–246.
  5. Chiba, S. 2009. Morphological divergence as a result of common adaptation to a shared environment in land snails of the genus Hirasea. J. Mollus. Stud. 75(3): 253–259.
  6. Cook, L.M. and Cain, A.J. 1980. Population dynamics, shell size and morph frequency in experimental populations of the snail Cepaea nemoralis (L.). Biol. J. Linn. Soc. 14: 259–292.
  7. Goodfriend, G.A. 1986. Variation in land-snail shell form and size and its causes: a review. Syst. Biol. 35(2): 204–223.
  8. Gould, S.J. 1984. Covariance sets and ordered geographic variation in Cerion from Aruba, Bonaire, and Curaçao: a way of studying nonadaptation. Syst. Zool. 33(2): 217–237.
  9. Hijmans, R.J., Cameron, S.E., Parra, J.L., Jones, P.G. and Jarvis, A. 200 Very high resolution interpolated climate surfaces for global land areas. Int. J. Climatol. 25: 1965–1978.
  10. Joliffe, I.T. and Morgan, B.J. 1992. Principal component analysis and exploratory factor analysis. Stat. Methods Med. Res. 1: 69–95.
  11. Konuma, J. and Chiba, S. 2007. Trade-offs between force and fit: extreme morphologies associated with feeding behavior in carabid beetles. Am. Nat. 170: 90–100.
  12. Lazaridou-Dimitriadou, M. and Bailey, S.E.R. 1991. Growth, reproduction and activity rhythms in 2 species of edible snails, Helix aspersa and Helix lucorum, in non 24-hour light cycles. J. Zool. 225: 381–391.
  13. Lazaridou-Dimitriadou, M. and Saunders, D.S. 1985. The influence of humidity, photoperiod, and temperature on the dormancy and activity of Helix lucorum L. (Gastropoda, Pulmonata). J. Mollus. Stud. 52(3): 180–189.
  14. Lejava, G. 1973.
  15. Animal World of Georgia, Tom IV. Metsniereba, Tbilisi (in Georgian). Lubell, D. 2004. Prehistoric edible land snails in the circumMediterranean: the archaeological evidence. In: Petits animaux et sociétés humaines du complément alimentaire aux resources utilitaires (Eds. J.P. Brugal and J. Desse). Éditions APDCA, Antibes. Osselaer, C.V. and Tu