“For 50 years, scientists have considered sharks to use the magnetic field as an infiltration aid,” says Brian Keller, a recent Ph.D. Florida State University (FSU) graduate who conducted his research at the Coastal and Marine Laboratory. “This theory is very popular because sharks, slides and rays have been shown to be highly sensitive to magnetic fields. They have been trained to react to unique geomagnetic signatures, so we know that they are capable of detecting and reacting to variations of the magnetic field.”
Although there has always been a theory about the relationship between electromagnetic fields and sharks, scientists have struggled to find a way to prove it… until now. Published in the latest issue of Current Biology, Keller and a team were able to show that sharks use the Earth’s magnetic fields to help guide them on these long journeys. Sharks, like many creatures and marine animals, travel long distances to reach the same place in a behavior and are referred to as “site reliability”. These large displacements always attract media attention and raise some questions. “The [main] The question is how they get back to the same garden every year, ”said Dean Groops, director of laboratory research.
One of these species is the bonnethead shark (Spirna Thiburo) Spends the summer on the beach outside the FSU before migrating south toward the heat for the winter. These warm-blooded sharks are part of the hammer family, and have been identified as omnivores that can integrate seagrass objects in addition to the prey they commonly eat (such as crustaceans). Bonnetheads like water at a certain temperature and use it as a penetration aid to get information like a map from the geomagnetic field there. But Keller says this capability could have other uses, such as “maintaining population structure”.
Scientists have predicted that if sharks use magnetic conditions as a directional tool, they will naturally head north when exposed to the southern magnetic field. They also believed that sharks show no preference in their orientation when exposed to a magnetic field that matches the field of the capture site. So, they caught 20 young bonnet heads from the forest and exposed them to magnetic conditions that marked hundreds of miles from where the sharks were caught … and their predictions came true! Although the study focuses on bonnetheads, Keller said the findings apply to other shark species as well. When there are other penetration tips (such as currents and waves), scientists believe our planet’s magnetic field will be “very effective.” […] Because it is relatively unchanged. ”
Many animals can sense the earth’s magnetic field and analyze changes in that field, such as bacteria, algae, birds, rodents, and waterfalls. The mechanisms by which sharks perceive and use magnetic information continue to be debated, and most agree that Lorenzini’s Ambulla and their relatives (skates, rays, and chimeras) play a major role in sharks. These jelly-filled sensory organs cover these predators ’moans and allow them to feel electric and magnetic fields. But what if this complex e-sensing system is overloaded? Well, this is something that researchers are noticing – a potential barrier! Adding cheap magnets to underwater fish traps has been shown to reduce shark and radiation exposure, so they look at how magnets can keep us safe when we share the same habitat.