Proceedings: Animal Sciences

, Volume 91, Issue 1, pp 39–44 | Cite as

Shell selection in the estuarine hermit crabClibanarius longitarsus (De Haan)

  • S Ajmal Khan
  • R Natarajan


In the laboratory, under choice situation,C. longitarsus preferred shells with greater shell width and shell weight. The correlation coefficient values calculated between the crab and shell parameters in the laboratory sample showed that this hermit crab selects a shell of suitable dimension for its occupation. In the multiple regression equations calculated with carapace length against the three shell variables aperture width, shell width and shell weight which are deemed to be important for hermit crabs, the regression coefficient of the variables varied much. The unsealed first principal component explained 84·9% of the total variability of the shell parameters and scaled first principal component explained 95·8% of shell parameters. The scaled first principal component was found to be a reliable estimator of shell size and the hermit crab, if given a choice, selected a shell of suitable dimension which fits its body quite closely.


Clibanarius longitarsus shell selection in laboratory multivariate analysis. 


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  1. Ajmal Khan S Mercy Thomas and Natarajan R 1980 Principal component analysis in the shell selection behaviour of the land hermit crabCoenobita cavipes Stimpson;Indian J, Mar. Sci. 9 293–294Google Scholar
  2. Ajmal Khan S and Natarajan R 1981 Coexistence in hermit crabs of Vellar estuary;Indian J. Mar. Sci 10 201–204Google Scholar
  3. Bailey R T J (ed.) 1959Statistical imthodsin biology (London: English Universities Press) p. 51Google Scholar
  4. Grant W.C and Ulmer K M 1974 Shell selection and aggressive behaviour in two sympatric species of hermit, crabs;Biol Bull. 146 32–43CrossRefPubMedGoogle Scholar
  5. Kuris M A and Brody M S 1976 Use. of principal component analysis to describe the snail shell resources for hermit crabs;J. Exp. May. Biol Ecol 22 69–77CrossRefGoogle Scholar
  6. Mitchell K A 1976 Shsll selection in the hermit crabPagwus bernhardus, Mar. Biol 35 335–343CrossRefGoogle Scholar
  7. Reess E S 1963 The behavioural mechanisms underlying shell selection by hermit crabs;Behaviour 21 78–126CrossRefGoogle Scholar

Copyright information

© Indian Academy of Sciences 1982

Authors and Affiliations

  • S Ajmal Khan
    • 1
  • R Natarajan
    • 1
  1. 1.Centre of Advanced Study in Marine BiologyAnnamalai UniversityParangipettaiIndia

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