TY - JOUR
TI - Effect of Modified Magnetic Field on the Ocean Migration of Maturing Chum Salmon, Oncorhynchus keta
AU - Yano, A
AU - Ogura, M
AU - Sato, A
AU - Sakaki, Y
AU - Shimizu, Y
AU - Baba, N
AU - Nagasawa, K
T2 - Marine Biology
AB - To investigate the role of magnetic compass orientation in oceanic migrating chum salmon, Oncorhynchus keta, an ultrasonic telemetry study was carried out in the western North Pacific of the coast of Kushiro, Hokkaido. Four salmon were fitted with a tag which generated an artificial magnetic field and modified the geomagnetic field around the head of the fish. Initially, the free-ranging salmon with stomach-implanted ultrasonic transmitters were tracked for a period of several hours before the magnetic field was altered for a period of 16 h. The generator produced an alternating magnetic field intensity of about 6 gauss, with polarity which reversed every 11.25 min. There was no observable effect on the horizontal and vertical movements of the salmon when the magnetic field was modified. However, it was noted that salmon slowed their swimming speed significantly before changing direction, regardless of whether the fish were swimming under the normal geomagnetic field or whether they were swimming under the modified field.
DA - 1997/09//
PY - 1997
VL - 129
SP - 523
EP - 530
UR - https://link.springer.com/article/10.1007%2Fs002270050193
DO - 10.1007/s002270050193
LA - English
KW - EMF
KW - Fish
KW - Pelagic Fish
ER -