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Journal of Comparative Physiology A

, Volume 162, Issue 4, pp 453–462 | Cite as

Orientation of the sandhopperTalitrus saltator (Amphipoda, Talitridae) living on dynamic sandy shores

  • A. Ugolini
  • F. Scapini
Article

Summary

The littoral sandhopperTalitrus saltator Montagu maintains its position along the beach mainly by means of an innate solar orientation. Different populations show different directional tendencies depending on the direction of the sealand axis. Experiments were designed which aimed to disentangle the innate and acquired components of the escape orientation. Therefore, the solar orientation of experienced adults living on shores subject to fluctuations of the shoreline and of their laboratory-born (inexperienced) offspring were compared. The innate sun compass orientation shown by the young is modified by learning during life under natural conditions, depending on the variability of the shore. Results showed: (1) an improvement in the solar orientation in individuals living on relatively constant shores; (2) a loss of precision in individuals living on highly dynamic shores; (3) a change to a new ecologically efficient escape direction in individuals living on a relatively stable lagoon shore.

Keywords

Beach Natural Condition Directional Tendency Experienced Adult Sandy Shore 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Abbreviation

TED

theoretical escape direction

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Copyright information

© Springer-Verlag 1988

Authors and Affiliations

  • A. Ugolini
    • 1
  • F. Scapini
    • 1
  1. 1.Dipartimento di Biologia Animale e GeneticaUniversitàe di FirenzeFirenzeItaly

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