Second, there is a significant trend of increasing baseline ventilation frequency towards the end of the dark period.
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Characteristics of the sleep structure in the cleaner wrasse Labroides dimidiatus.
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The sentences
The sleep states of the cleaner wrasse were characterized by a decreased ventilation rate, occasional distinctive waving movements, rapid eye movement (REM) episodes, and an increasing trend in both ventilation rate and REM episodes toward the end of the night period.