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Postprandial sleep in larval Astyanax is only dependent on the amount of food consumed for surface fish fed before ZT2. Correlation of amount of Artemia nauplii consumed with sleep duration in the 4 hours following feeding with a simple linear regression for surface (A–C), Pachón (D–F), and Tinaja (G–I). (A, D, G) Larvae were fed before ZT2. (B, E, H) Larvae were fed before ZT6. (C, F, I) Larvae were fed before ZT10.
