Corpus ID: 1747306

Sleep in fishes

@inproceedings{Reebs2014SleepIF,
  title={Sleep in fishes},
  author={S. G. Reebs},
  year={2014}
}
Do fishes sleep? This is not an easy question. It depends on what you mean by “sleep”. Most sleep researchers, being focused on mammals, recognise sleep when they see distinctive patterns of electrical activity of the brain. Fish, however, lack the complex brain structures from where these patterns originate. Another criterion to define sleep, used mainly in the field or in situations where electroencephalographs are not available, is prolonged eye closure. But fish do not have eyelids! 
Effect of feeding with different dietary protein levels and starvation on the health, nonspecific immune parameters, behavior and histoarchitectures of fantail goldfish (Carassius auratus L.).
TLDR
It is clarified that significant high growth rate, improved welfare; decrease aggressive behavior, improved biochemical serum parameters and immune response were observed in group feed with diet containing 45% crude protein. Expand

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It is argued that most fish species have a circadian system but that havingsuch a system does not necessarily imply strict diurnalism or nocturnalism, and that Rigidity ofactivity phase seems more common in species that display behavioral sleep. Expand
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