A new method to calibrate attachment angles of data loggers in swimming sharks

23Citations
Citations of this article
48Readers
Mendeley users who have this article in their library.

This article is free to access.

Abstract

Recently, animal-borne accelerometers have been used to record the pitch angle of aquatic animals during swimming. When evaluating pitch angle, it is necessary to consider a discrepancy between the angle of an accelerometer and the long axis of an animal. In this study, we attached accelerometers to 17 free-ranging scalloped hammerhead shark (Sphyrna lewini) pups from Kaneohe Bay, Hawaii. Although there are methods to calibrate attachment angles of accelerometers, we confirmed that previous methods were not applicable for hammerhead pups. According to raw data, some sharks ascended with a negative angle, which differs from tank observations of captive sharks. In turn, we developed a new method to account for this discrepancy in swimming sharks by estimating the attachment angle from the relationship between vertical speed (m/s) and pitch angle obtained by each accelerometer. The new method can be utilized for field observation of a wide range of species. © 2010 Shizuka Kawatsu et al.

Cite

CITATION STYLE

APA

Kawatsu, S., Sato, K., Watanabe, Y., Hyodo, S., Breves, J. P., Fox, B. K., … Miyazaki, N. (2010). A new method to calibrate attachment angles of data loggers in swimming sharks. Eurasip Journal on Advances in Signal Processing, 2010. https://doi.org/10.1155/2010/732586

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free