#ANOMALY ON SHARK ISLAND FREE#

Masters Thesis, California State University, Long Beach Horizontal and vertical movements and seasonal population shifts in the blue shark, Prionace glauca, near Santa Catalina Island, California. Food habits of the blue shark, Prionace glauca, in the Northwest Atlantic. Thesis, University of Rhode Island, Department of Oceanography, Dissertation Abstracts No. Aspects of the feeding ecology of the blue shark, Prionace glauca in the Western North Atlantic. Geological and geophysical investigations of continental margins. Magnetite biomineralization and magnetoreception in organisms.

(1986) Evidence from strandings for geomagnetic sensitivity in cetaceans. Electromagnetic fields and neurobehavioral function. Electromagnetic orientation: a relativistic approach. Cambridge University Press, Cambridge, p. Comparative physiology of sensory systems. Theory of electromagnetic orientation: a further analysis. Biophysics of geomagnetic field detection. Government Printing Office, Washington D.C., p. Sensory biology of sharks, skates and rays. Electric and magnetic sensory world of sharks, skates, and rays. Internal waves, fine-structure, microstructure and mixing in the ocean. 1st World Angling Conf., Cap d'Adge, France, 1984. (ed.) World angling resources and challenges. Transatlantic migrations of the blue shark A case history of cooperative shark tagging. The visceral temperatures of mackerel sharks ( Lamnidae). Daily patterns in the activities of swordfish, Xiphias gladius, observed by acoustic telemetry. Temperature regulation in free-swimming bluefin tuna.

#ANOMALY ON SHARK ISLAND FREE#

Blood flow in the muscle of free swimming fish.

Bird migration across a strong magnetic anomaly.

These possibilities are discussed in the appendix.Īlerstam, T. The sharks may orient to the earth's magnetic field, or to the ocean's electric fields, allowing them to swim on a constant heading in the absence of celestial cues. Most of the sharks moved in a southeasterly direction from the release point and many maintained a constant course day and night for several days. Diving is discussed in terms of a hunting tactic and behavioral thermoregulation. This behavior was prominent in trials from August through March, but was not seen from June through July. The oscillations, which were repeated every few hours, were largest in the daytime and were smaller in amplitude and confined to depths near the thermocline at night. The sharks frequently made vertical excursions between the surface and depths of several hundred meters. Acoustic telemetry was used to follow 22 blue sharks, Prionace glauca (Linnaeus), over the continental shelf and slope in the region between George's Bank and Cape Hatteras between 19.

Anomaly on shark island