Data for: Brain activity of diving seals reveals short sleep cycles at depth

Sleep is a crucial part of the daily activity patterns of mammals. However, in marine species that spend months or entire lifetimes at sea, the location, timing, and duration of sleep may be constrained. To understand how marine mammals satisfy their daily sleep requirements while at sea, we monitored electroencephalographic (EEG) activity in wild northern elephant seals (Mirounga angustirostris) diving in Monterey Bay, California, USA. In this study, we characterized the sleep patterns of northern elephant seals from land to sea. Periods of electrophysiological sleep (slow wave sleep and rapid-eye-movement sleep) were recorded in seals on land, floating in shallow water, on the ocean floor in shallow water and the continental shelf, and during open ocean drift dives. While there was considerable variation in sleep patterns across individuals, total sleep time was lowest while sleeping at sea (<2 h/day) and highest while sleeping on land (~10 h/day). We linked sleep patterns to accel..., See the associated code repository and manuscript (links in the Related Works section) for additional information on the methods for data collection and processing., This repository contains data relating to the manuscript “Brain activity of diving seals reveals short sleep cycles at depth.” Science (2023). Related code for this paper can be found in the versioned Zenodo repository.
 , # Data for: Brain activity of diving seals reveals short sleep cycles at depth

**Suggested citation for this dataset:** Kendall-Bar, JM; Williams, TM; Mukherji, R; Lozano, DA; Pitman, JK; Holser, RR; Keates, T; Beltran, RS; Robinson, PW; Crocker, DE; Adachi, T; Lyamin, OI; Vyssotski, AL; Costa, DP (2023). Data for: Brain activity of diving seals reveals short sleep cycles at depth.

**This repository contains the data and code for our paper:** Kendall-Bar, JM; Williams, TM; Mukherji, R; Lozano, DA; Pitman, JK; Holser, RR; Keates, T; Beltran, RS; Robinson, PW; Crocker, DE; Adachi, T; Lyamin, OI; Vyssotski, AL; Costa, DP (2023). Brain activity of diving seals reveals short sleep cycles at depth. *Science*.

## Data structure and files

Missing values may be represented by NA, NaN, or - when data are not available. See Column Description dropdown menus for dataset-specific information.

## 00 Metadata and Summary Data files:

### Results Summary

* Wide-format table with metadata for EE...