title: Electrocardiographic Studies of Free-Swimming Sharks.
abstract: Electrocardiograms were taken of young lemon sharks, Negaprion brevirostris, as they swam freely in a circular concrete pool. Electrodes attached to the fin and torso yielded negligible or minute deflections, but direct leads yielded satisfactory recordings.
authors.forename: P W
authors.initials: PW
authors.lastname: Gilbert
authors.forename: S D
authors.initials: SD
authors.lastname: Douglas