Which way is up? Asymmetric spectral input along the dorsal–ventral axis influences postural responses in an amphibious annelid

@article{Jellies2014WhichWI,
  title={Which way is up? Asymmetric spectral input along the dorsal–ventral axis influences postural responses in an amphibious annelid},
  author={John A Jellies},
  journal={Journal of Comparative Physiology A},
  year={2014},
  volume={200},
  pages={923-938}
}
Medicinal leeches are predatory annelids that exhibit countershading and reside in aquatic environments where light levels might be variable. They also leave the water and must contend with terrestrial environments. Yet, leeches generally maintain a dorsal upward position despite lacking statocysts. Leeches respond visually to both green and near-ultraviolet (UV) light. I used LEDs to test the hypothesis that ventral, but not dorsal UV would evoke compensatory movements to orient the body… CONTINUE READING

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