Tilt Angle and Theoretical Target Strength of the Japanese Sandeel, Ammodytes personatus Captured on the Northern Coast of Hokkaido, Japan - Safruddin, Yohai K., Yusuke I., Kenji M., Kazuhiko I., Keiji M., Ryuichi M., Koki A., Hiroki Y., and Kazushi M Y. Kawauchi, , Y. Ito, K. Minami, K. Itaya, K. Maeda , K. Abe, R. Matsukura, H. Yasuma, K. Miyashita (J. Marine Acoust. Soc. Jpn, 2014)