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Journal of comparative physiology

, Volume 131, Issue 1, pp 13–21 | Cite as

Melanophore potentials of the chromatically intact spinal stoneloach (Noemacheilus barbatulus L.) following adaptation to varying backgrounds

  • C. S. Collis
Article
  • 21 Downloads

Summary

  1. 1.

    The transient colour response of the stoneloach (Noemacheilus barbatulus) is similar to that described for some other freshwater teleosts.

     
  2. 2.

    A method is described for measuring the melanophore transmembrane potentials resulting from direct activity of the intact chromatic system.

     
  3. 3.

    Using this method the melanophore index and the melanophore potential at the cell centrosphere were measured in fish adapted to black and white backgrounds and during background reversal (Figs. 5, 6).

     
  4. 4.

    The amount of pigment movement for the same change in centrosphere potential is greater in melanophores that are aggregating than in those that are dispersing.

     
  5. 5.

    The melanophore index and the melanophore potential at the cell centrosphere were measured in fish subjected to darkness following adaptation to black and white backgrounds (Fig. 7), and in fish subjected to illumination on black and white backgrounds after adaptation in darkness (Fig. 8).

     
  6. 6.

    The melanophore index and the melanophore potential both at the cell centrosphere and at the edge of the pigment were measured in fish adapted to backgrounds of varying reflectivity (Table 1). In all positions of the pigment the sum of these potentials remained nearly constant, although the potentials themselves varied (Figs. 9, 10).

     

Keywords

Colour Direct Activity Transmembrane Potential White Background Colour Response 
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.

Abbreviations

D.O.I.

Derived Ostwald Index (see Table 1)

M.I.

Melanophore Index

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Copyright information

© Springer-Verlag 1979

Authors and Affiliations

  • C. S. Collis
    • 1
  1. 1.Department of ZoologyBedford College (University of London)Regent's Park, LondonEngland

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