Upside-down swimming behaviour of free-ranging narwhals-2

• Main Authors: Dietz, Rune, Shapiro, Ari D, Bakhtiari, Mehdi, Orr, Jack, Tyack, Peter L, Richard, Pierre, Eskesen, Ida Grønborg, Marshall, Greg
• Format: Still Image
• Language: unknown
• Published: figshare 2011
• Subjects: Uncategorised; narwhal*
• Online Access: https://dx.doi.org/10.6084/m9.figshare.21752.v1; https://figshare.com/articles/figure/Upside-down_swimming_behaviour_of_free-ranging_narwhals-2/21752/1

Copyright information: Taken from "Upside-down swimming behaviour of free-ranging narwhals"http://www.biomedcentral.com/1472-6785/7/14BMC Ecology 2007;7():14-14.Published online 19 Nov 2007PMCID:PMC2238733.during the third dive of each animal. To dispense with the ambiguity of equal and opposite turns off the central axis, imagine a unit circle coincident with a trans-axial cross-section of the body where 0 and π lie along the right and left sides of the body midline, respectively. The thicker segments in the figure correspond to the roll angle ranging between ±π/2 passing through 0 and the thinner segments to the roll angle ranging between ±π/2 passing through π. The purple and green dots at the bottom of the two panels indicate when the animals were turning clockwise and counter-clockwise, respectively.